Programmieren lernen mit Java GERMAN

Erwin Merker Roman Merker Programmieren lernen mit JAVA Aus dem Bereich IT erfolgreich lernen Lexikon für IT-Berufe...

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Erwin Merker Roman Merker

Programmieren lernen mit JAVA

Aus dem Bereich IT erfolgreich lernen

Lexikon für IT-Berufe von Peter Fetzer und Bettina Schneider Grundkurs IT-Berufe von Andreas M. Böhm und Bettina Jungkunz Java für IT-Berufe von Wolf-Gert Matthäus Prüfungsvorbereitung für IT-Berufe von Manfred Wünsche Grundlegende Algorithmen von Volker Heun Algorithmen für Ingenieure – realisiert mit Visual Basic von Harald Nahrstedt Grundkurs Programmieren mit Delphi von Wolf-Gert Matthäus Grundkurs Visual Basic von Sabine Kämper Visual Basic für technische Anwendungen von Jürgen Radel Grundkurs Smalltalk – Objektorientierung von Anfang an von Johannes Brauer Grundkurs Software-Entwicklung mit C++ von Dietrich May Grundkurs JAVA von Dietmar Abts Aufbaukurs JAVA von Dietmar Abts Grundkurs Java-Technologien von Erwin Merker Java ist eine Sprache von Ulrich Grude Middleware in Java von Steffen Heinzl und Markus Mathes Das Linux-Tutorial – Ihr Weg zum LPI-Zertifikat von Helmut Pils Rechnerarchitektur von Paul Herrmann Grundkurs Relationale Datenbanken von René Steiner Grundkurs Datenbankentwurf von Helmut Jarosch Datenbank-Engineering von Alfred Moos Grundlagen der Rechnerkommunikation von Bernd Schürmann Netze – Protokolle – Spezifikationen von Alfred Olbrich Grundkurs Verteilte Systeme von Günther Bengel Grundkurs Mobile Kommunikationssysteme von Martin Sauter

www.vieweg.de

Grundkurs Wirtschaftsinformatik von Dietmar Abts und Wilhelm Mülder Grundkurs Theoretische Informatik von Gottfried Vossen und Kurt-Ulrich Witt Anwendungsorientierte Wirtschaftsinformatik von Paul Alpar, Heinz Lothar Grob, Peter Weimann und Robert Winter Business Intelligence – Grundlagen und praktische Anwendungen von Hans-Georg Kemper, Walid Mehanna und Carsten Unger Grundkurs Geschäftsprozess-Management von Andreas Gadatsch Prozessmodellierung mit ARIS ® von Heinrich Seidlmeier ITIL kompakt und verständlich von Alfred Olbrich BWL kompakt und verständlich von Notger Carl, Rudolf Fiedler, William Jórasz und Manfred Kiesel Masterkurs IT-Controlling von Andreas Gadatsch und Elmar Mayer Masterkurs Computergrafik und Bildverarbeitung von Alfred Nischwitz und Peter Haberäcker Grundkurs Mediengestaltung von David Starmann Grundkurs Web-Programmierung von Günter Pomaska Web-Programmierung von Oral Avcı, Ralph Trittmann und Werner Mellis Grundkurs MySQL und PHP von Martin Pollakowski Grundkurs SAP R/3® von André Maassen und Markus Schoenen SAP ®-gestütztes Rechnungswesen von Andreas Gadatsch und Detlev Frick Kostenträgerrechnung mit SAP R/3® von Franz Klenger und Ellen Falk-Kalms Masterkurs Kostenstellenrechnung mit SAP® von Franz Klenger und Ellen Falk-Kalms Controlling mit SAP ® von Gunther Friedl, Christian Hilz und Burkhard Pedell Logistikprozesse mit SAP R/3® von Jochen Benz und Markus Höflinger IT-Projekte strukturiert realisieren von Ralph Brugger Programmieren lernen mit Java von Erwin Merker und Roman Merker

Erwin Merker Roman Merker

Programmieren lernen mit Java Leicht verständlich – Griffige Beispiele – Ausführbare Programme Mit 52 Abbildungen

Bibliografische Information Der Deutschen Bibliothek Die Deutsche Bibliothek verzeichnet diese Publikation in der Deutschen Nationalbibliografie; detaillierte bibliografische Daten sind im Internet über abrufbar.

Prof. Dr.-Ing. habil. Reiner R. Dumke lehrt Software-Technik an der Universität Magdeburg. Er ist Leiter des dortigen Software-Messlabors sowie Leiter bzw. Mitglied in maßgeblichen Gremien auf dem Gebiet der Softwaremetrie (GI-Fachgruppe für Software-Messung und -Bewertung; DASMA; COSMIC).

Die Wiedergabe von Gebrauchsnamen, Handelsnamen, Warenbezeichnungen usw. in diesem Werk berechtigt auch ohne besondere Kennzeichnung nicht zu der Annahme, dass solche Namen im Sinne von Warenzeichen- und Markenschutz-Gesetzgebung als frei zu betrachten wären und daher von jedermann benutzt werden dürfen. Höchste inhaltliche und technische Qualität unserer Produkte ist unser Ziel. Bei der Produktion und Auslieferung unserer Bücher wollen wir die Umwelt schonen: Dieses Buch ist auf säurefreiem und chlorfrei gebleichtem Papier gedruckt. Die Einschweißfolie besteht aus Polyäthylen und damit aus organischen Grundstoffen, die weder bei der Herstellung noch bei der Verbrennung Schadstoffe freisetzen.

1. Auflage Februar 2006 Alle Rechte vorbehalten © Friedr. Vieweg & Sohn Verlag | GWV Fachverlage GmbH, Wiesbaden 2006 Lektorat: Dr. Reinald Klockenbusch / Andrea Broßler Der Vieweg Verlag ist ein Unternehmen von Springer Science+Business Media. www.vieweg.de

Das Werk einschließlich aller seiner Teile ist urheberrechtlich geschützt. Jede Verwertung außerhalb der engen Grenzen des Urheberrechtsgesetzes ist ohne Zustimmung des Verlags unzulässig und strafbar. Das gilt insbesondere für Vervielfältigungen, Übersetzungen, Mikroverfilmungen und die Einspeicherung und Verarbeitung in elektronischen Systemen.

Konzeption und Layout des Umschlags: Ulrike Weigel, www.CorporateDesignGroup.de Umschlagbild: Nina Faber de.sign, Wiesbaden Druck und buchbinderische Verarbeitung: Tˇeˇsínská tiskárna, a.s.; Tschechische Republik Gedruckt auf säurefreiem und chlorfrei gebleichtem Papier. Printed in the Czech Republic ISBN 3-8348-0068-6

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Stand: 22.12.2005 13:39:00 ))


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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))


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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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int zahl = 4700;

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))


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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))


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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))


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Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

##

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##

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

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?a^VaP\\ EPaXPQ[T]!) 8]XcXP[XbXTaT] e^] [^ZP[T] EPaXPQ[T] public class Variablen02 { public static void main(String[] args) char zeichen = 'x'; double gehalt = 2000.00; boolean vorhanden= true; System.out.println(vorhanden); } }

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Stand: 22.12.2005 13:39:00 ))

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;»bd]VbeâbRW[PV) ?a^VaP\\ EPaXPQ[T]") FTacTidfTXbd]V P] EPaXPQ[T] public class Variablen03 { public static void main(String[] args) char zeichen; double gehalt; boolean vorhanden; zeichen = 'x'; gehalt = 2000; vorhanden = true; System.out.println(vorhanden); } }

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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text = new String("Merker");

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public class String02 { public static void main(String[] args) String str1 = new String("Java"); String str2 = new String("buch"); String ergebnis; ergebnis = str1.concat(str2); System.out.println(ergebnis); } }

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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String str1; str1 = new String("Java");

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String text = "Hallo";

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import java.awt.*; class Point01 { %

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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9]\abO\bS\ aW\R W\ 8OdO `]UÒ[[WS`S` ZSRWUZWQV [rUZWQV RWSaS >ZÉbhS TX]\P[ hc TºZZS\ RO\OQV Wab SW \S Ò\RS`c\U \WQVb [SV` S`ZOcPb 9]\abO\bS\ PSabSVS\ Oca •

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{

%#

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

%

BcaTP\:^]iT_c

?a^VaP\\ BcaTP\#) C2?8?ETaQX]Sd]V P[b 4X]VPQTbca^\ import java.net.*; import java.io.*; public class Stream04 { public static void main(String[] args) throws Exception { ServerSocket ss = new ServerSocket(1500); Socket s = ss.accept(); DataInputStream ein = new DataInputStream(s.getInputStream()); int zahl = ein.read(); System.out.println(zahl); } }

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{

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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9ZGTJGXJ+OTMGHK 4º` ROa 3W\ZSaS\ d]\ HSWQVS\ RWS RS` 0SRWS\S` O[ 0WZRaQVW`[ SW\USbW^^b VOb UWPb Sa SW\S U`]zS DWSZTOZb c\bSàQVWSRZWQVS` ;SbV]RS\ /ZZS VOPS\ OZa 0OaWa ROa 3W\ZSaS\ d]\ 3W\hSZhSWQVS\ R]QV UWPb Sa OcQV Y][T]`bOPZS ;SbV]RS\ RWS Tº` ROa >`]UÒ[[ UO\hS HSWQVS\YSbbS\ Y][^ZSbbS HSWZS\ ]RS` bg^WaWS`bS 2ObS\ SW\ZSaS\ c\R RWSaS \OQV PSabW[[bS\ @SUSZ\ O\OZgaWS`S\ c\R Tº` RWS DSÒ`PSWbc\U hc` DS`TºUc\U abSZZS\ ?a^VaP\\ 2^]b^[T ) ITXRWT]fTXbT ;TbT] e^] STa :^]b^[T SXTb\P[ \Xc 1hcTbcaTP\ d]S \Xc eTaZ¶aicT] BRWaTXQfTXbT import java.io.*; public class Console01 { public static void main(String[] args) throws Exception { int zeichen1 = System.in.read(); System.out.println(zeichen1); } } 2Oa >`]UÒ[[ 2^]b^[T SèO`bSb d][ 0SRWS\S` RWS 3W\UOPS SW\Sa HSWQVS\a ;Wb RS` ;SbV]RS aTPS eW`R dSàcQVb Oca RS[ 3W\UOPSab`][ SW\ HSWQVS\ hc ZSaS\ ES\\ RS` Ab`SO[ ZSS` aSW\ a]ZZbS ab]^^b ROa >`]UÒ[[ c\R Sa PSUW\\b RWS /`PSWb Sàb RO\\ eWSRS` eS\\ SW\ HSWQVS\ ºPS` BhbcT\X] SW\USUSPS\ ec`RS c\R RS` 0S RWS\S` RWS 3\bS`bOabS USR`ºQYb VOb ÎQd]V id\ ?a^VaP\\ 2^]b^[T 5SPS\ AWS ROa HSWQVS\ SW\ ROa OZa /\be]`b # OcaUWPb :rac\UaVW\eSWa( 0WbbS W\ RS` C\WQ]RSBOPSZZS \OQVaQVOcS\ c[ hc S`[WbbSZ\ eSZQVSa HSWQVS\ RS\ \c[S`W aQVS\ ES`b # VOb 2Oa \ÉQVabS 0SWa^WSZ RS[]\ab`WS`b ROa 3W\ZSaS\ d]\ [SV`S`S\ HSWQVS\ /\ RWSaS` AbSZZS TSVZS\ \]QV 9S\\b\WaaS hc` AQVZSWTS\PWZRc\U W\ 8OdO `]UÒ[[ bg^WaWS`bS 2ObS\ OZa] X]c U[^Pc cae SèO`bSb 3a YO\\ OcQV aSW\ ROaa SdS\bcSZZ d]`VO\RS\S AbScS`hSWQVS\ S`YO\\b c\R Ocb][ObWaQV W\bS`^`SbWS`b eS`RS\ a]ZZS\ 2WS AbO\RO`R0WPZW]bVSY d]\ 8 A3 S\b VÉZb RWS 9ZOaaS BRP]]Ta RWS SW\S Y][T]`bOPZS ;rUZWQVYSWb PWSbSb BSfbS c\R 8OdO W\bS`\S 2ObS\bg^S\ SW\hcZSaS\ 2WS SW\USZSaS\S\ 2ObS\ eS`RS\ d]\ ;SbV]RS\ RWSaS` 9ZOaaS O\OZgaWS`b c\R \OQV d]ÙSUSPS\S\ @SUSZ\ W\bS`^`SbWS`b A] Yr\\S\ Y][^ZSbbS HSWZS\ SW\USZSaS\ c\R WV` 7\VOZb `WQVbWU S`YO\\b eS`RS\ 2WSaS` D]ÙO\U eW`R >OàS\ ]RS` AQO\\S\ US \O\\b 0SWa^WSZaeSWaS YO\\ SW\S HSWZS \SPS\ UO\hS\ Er`bS`\ OcQV RWS 8OdOW\bS`\S\ 2ObS\bg^S\ eWS X]c ]RS` S^dQ[T S\bVOZbS\ 2WS ;SbV]RS\ RS` 9ZOaaS BRP]]Ta c\bS` aQVSWRS\ RWS SW\hSZ\S\ Er`bS` VWS` B]YS\ US\O\\b O\VO\R d]\ B`S\\hSWQVS\ RWS T`SW eÉVZPO` aW\R AbO\RO`R[ÉzWU eS`RS\ RWS SW\hSZ\S\ B]YS\ SW\S` HSWZS OPUS b`S\\b Rc`QV :SSàbSZZS\ PZO\Y ;Wb RS[ T]ZUS\RS\ 0SWa^WSZ^`]UÒ[[ eW`R SW\S Y][^ZSbbS HSWZS d][ 0WZRaQVW`[ US ZSaS\ 2OPSW eW`R ROd]\ OcaUSUO\US\ ROaa RWSaS HSWZS T]ZUS\RS\ /cTPOc VOb( hc \ÉQVab eW`R SW\S PSZWSPWUS HSWQVS\T]ZUS Ab`W\U SèO`bSb) PSS\RSb eW`R RWSaS` Ab`W\U PSW[ /cTb`SbS\ RSa B`S\\hSWQVS\a 0ZO\Y 2O\\ T]ZUb OZa \ÉQVabSa B]YS\ SW\S UO\hS HOVZ c\R ROa ZSbhbS B]YS\ W\ RWSaS` HSWZS [caa SW\S 5ZSWbY][[OhOVZ W\ eWaaS\ aQVOTbZWQVS` AQV`SWPeSWaS [Wb RS[ 0cQVabOPS\ T aSW\ ?a^VaP\\ BRP]]Ta ) 4X]VPQT e^] ch_XbXTacT] 3PcT] BcaX]V X]c d]S S^dQ[T import java.util.Scanner; public class Scanner01 { public static void main(String[] args) { Scanner eingabe = new Scanner(System.in); String str = eingabe.next(); // Komplettes Wort lesen int zahl1 = eingabe.nextInt(); // Ganzzahl lesen double zahl2 = eingabe.nextDouble(); // E-Format z.B. 5e3 lesen System.out.printf("%s | %d | %f", str, zahl1,zahl2); } }

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Stand: 22.12.2005 13:39:00 ))


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import java.util.Scanner; public class TryCatch01 { public static void main(String[] args) { int zahl; Scanner eingabe = new Scanner(System.in); String str = eingabe.next(); // Erstes Wort lesen try { zahl = Integer.parseInt(str); // Konvertieren in Ganzzahl } catch (NumberFormatException e) { System.out.println("Es wurde keine Ganzzahl eingegeben"); System.exit(8); } System.out.println("Der eingegebene Text ist ok"); } }

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ÎQd]V id\ ?a^VaP\\ Cah2PcRW Ò\RS`\ AWS ROa >`]UÒ[[ a] ROaa OcT SW\S W\RWdWRcSZZS 4SVZS`PSVO\RZc\U dS`hWQVbSb eW`R BSabS\ AWS ROa >`]UÒ[[ c\R PS]POQVbS\ AWS ROa AgabS[dS`VOZbS\ EOa Ôa aWS`b eS\\ RS` 0SRWS\S` TOZaQVS 2ObS\ SW\bW^^b- ?a^VaP\\ BRP]]Ta") ;»bd]VbeâbRW[PV U¶a ST] ETaiXRWc PdU X]SXeXSdT[[T 5TW[TaQTWP]S[d]V import java.util.Scanner; public class Scanner03 { public static void main(String[] args) throws Exception { int zahl; Scanner eingabe = new Scanner(System.in); String str = eingabe.next(); // Erstes Wort lesen zahl = Integer.parseInt(str); // Konvertieren in Ganzzahl System.out.println("Der eingegebene Text ist ok"); } }

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eTJKXTJKY*KROSOZKXJKY(KMXKT`[TMY`KOINKTY`[S'[LZXKTTKTJKX(KMXOLLK 2WS 9ZOaaS BRP]]Ta PWSbSb RS[ >`]UÒ[[WS`S` RWS ;rUZWQVYSWb RS\ 2SZW[WbS` B`S\\hSWQVS\ XS \OQV AWbcObW]\ hc É\RS`\ 2Oa B`S\\hSWQVS\ Tº` SW\hSZ\S B]YS\ YO\\ Rc`QV /cT`cT RS` ;SbV]RS dbT3T[X\XcTa USÉ\RS`b eS`RS\ ASV` VÉcTWU eS`RS\ RWS SW\hSZ\S\ 0SU`WTTS RS` 3W\UOPSRObS\ Rc`QV 9][[O OPUSb`S\\b c\R ROa T]ZUS\RS >`]UÒ[[ hSWUb SW\S :rac\U Tº` RWSaS /cTUOPS\abSZZc\U ?a^VaP\\ BRP]]Ta #) Ó]STa] STb 1TVaT]id]VbiTXRWT]b import java.util.Scanner; public class Scanner04 { public static void main(String[] args) { Scanner eingabe = new Scanner(System.in); eingabe.useDelimiter(","); // Delimiter aendern String str = eingabe.next(); // Komplettes Wort lesen int zahl1 = eingabe.nextInt(); // Ganzzahl lesen double zahl2 = eingabe.nextDouble(); // E-Format z.B. 5e3 lesen System.out.printf("%s | %d | %f", str, zahl1,zahl2); } }

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'XHKOZKTSOZVXOTZRT[TJVXOTZ 2Oa 3ÙSP\Wa SW\S` /caUOPS [Wb RS\ dSàQVWSRS\S\ _aX]c Phe Uâ\Pc;SbV]RS\ Wab W[[S` SW\ Ab`W\U Ch_XbXTacT 3PcT] eWS X]c ]RS` U[^Pc eS`RS\ d]` RS` SWUS\bZWQVS\ /caUOPS Ocb][ObWaQV W\ SW\S Ab`W\U@S^`ÉaS\bObW]\ c[USeO\RSZb ?a^VaP\\ ?aX]c ) 0dbVPQT e^] 9PeP3PcT]ch_T] PdU 2^]b^[T public class Print01 { public static void main(String args[]){ int monat = 5; float gehalt = 2123.45f; String s1 = "Im Monat "; String s2 = "haben Sie "; System.out.print(s1 + monat + " "); System.out.print(s2 + gehalt + " "); System.out.println("verdient"); } } 2S` /caUOPSab`][ YO\\ OZa] Oca SW\S` 9][PW\ObW]\ d]\ PSZWSPWUS\ 8OdO2ObS\bg^S\ PSabSVS\ 2WS ^`W[WbWdS\ 2ObS\bg^S\ eS`RS\ Ocb][ObWaQV W\ SW\S\ Ab`W\U c[USeO\ ''

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public class Format01 { public static void main(String args[]) { float gehalt = 2000.00f; System.out.format("%f \n", gehalt); System.out.format("%e \n", gehalt); System.out.format("%g \n", gehalt); } } ÎQd]V id\ ?a^VaP\\ 5â\Pc 3àSbhS\ AWS RS\ ;SbV]RS\\O[S Uâ\Pc Rc`QV _aX]cU

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import java.io.*; public class Format02 { public static void main(String args[]) { int zahl = 90; System.out.format("%1$d / %ZObbS\ ]RS` 2D22ObSWS\ SW\USaSbhb /ZZS`RW\Ua UWPb Sa SW\S U`]zS 4ºZZS d]\ 9ZOaaS\ RWS XSeSWZa a^ShWOZWaWS`b aW\R c\R Tº` SÙÉ\hS\RS /cTUOPS\ WV`S 2WS\abS O\ PWSbS\ 2Oa /`PSWbS\ [Wb RWSaS\ 9ZOaaS\ Wab d]ZZ ]PXSYb]`WS\bWS`b 2SaeSUS\ \]QV SW\[OZ RS` 6W\eSWa( 3a TSVZS\ O\ RWSaS` AbSZZS \]QV SW\WUS D]ÒcaaSbhc\US\ c[ OZZS 1]RWS`bSQV\WYS\ RS` T]ZUS\RS\ 0SWa^WSZS hc dSàbSVS\ B`]bhRS[ e]ZZS\ eW` RS []\ab`WS`S\ eWS 2ObS\ OcT SW\S\ SfbS`\S\ A^SWQVS` h0 W\ SW\S ;OU\Sb^ZObbS\RObSW USaQV`WSPS\ [O\ aOUb( ^SàWabS\b US[OQVb eS`RS\ c\R eWS RWSaS O\aQVZWSzS\R eWSRS` USZSaS\ eS`RS\ Yr\\S\ 2Oa 9O^WbSZ YO\\ OZa] d][ 3W\abSWUS` hc\ÉQVab º PS`TZ]US\ c\R a^ÉbS` PSW 0SRO`T \OQVUSO`PSWbSb eS`RS\ 2WSaS` /PaQV\Wbb S\bVÉZb R`SW BVS[S\PS`SWQVS( •

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import java.io.*; public class Datei01 { public static void main(String[] args) throws Exception { OutputStream aus = new FileOutputStream("test1.dat"); DataOutput datenAus = new DataOutputStream(aus);

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Stand: 22.12.2005 13:39:00 ))


ÎQd]VT] id\ ?a^VaP\\ 3PcTX ÎQd]V ( 9ZÉ`S\ AWS T]ZUS\RS 4ÒUS\ Rc`QV /ca^`]PWS`S\( O EOa ÔaaWS`b eS\\ AWS RWSaSa >`]UÒ[[ S`\Scb OcT`cTS\- AW\R RWS 2ObS\ W\ RS` 2ObSW heSW[OZ d]`VO\RS\ ]RS` eW`R RWS 2ObSW ºPSàQV`WSPS\- P E] abSVb RWS 2ObSW eS\\ AWS W\ RS` dWS`bS\ HSWZS W\\S`VOZP RS` /\TºV`c\Uaab`WQVS T]ZUS\RSa O\USPS\( c:\test1.dat - ÎQd]V !( Ò\RS`\ AWS RWS /caUOPS[SbV]RS W\ faXcT1hcTb EWS É\RS`b aWQV RS` 7\ VOZb RS` /caUOPSRObSW- /\aQVZWSzS\R e]ZZS\ eW` SW\ >`]UÒ[[ Q]RWS`S\ ROa RWS 2ObS\ Oca RS` 2ObSW cTbc SPc eWSRS` W\ RS\ /`PSWbaa^SWQVS` SW\ZWSab c\R d]\ R]`b W\ SW\S[ 9]\a]ZTS\abS` OcaUWPb ?a^VaP\\ 3PcTX!) 4X][TbT] e^] ch_XbXTacT] EPaXPQ[T] Pdb TX]Ta 3PcTX

import java.io.*; public class Datei02 { public static void main(String[] args) throws Exception { InputStream ein = new FileInputStream("test1.dat"); DataInput datenEin = new DataInputStream(ein); int plz = datenEin.readInt(); String kdname = datenEin.readUTF(); String ort = datenEin.readUTF(); System.out.println(plz + " " + kdname + " " + ort); } } ÎQd]VT] id\ ?a^VaP\\ 3PcTX! ÎQd]V ( Ò\RS`\ AWS hc\ÉQVab ROa AQV`SWP>`]UÒ[[ 3PcTX YPeP a] OP ROaa SW\S heSWbS /R`SaaS W\ RWS 2ObSW USaQV`WSPS\ eW`R ÎQd]V !( 2O\OQV a]ZZ OcQV ROa :SaS>`]UÒ[[ 3PcTX!YPeP a] USÉ\RS`b eS`RS\ ROaa RWSaS heSWbS /R`SaaS SW\USZSaS\ c\R O\UShSWUb eW`R

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Stand: 22.12.2005 13:39:00 ))

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00 00 00 AE #

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


2WSaS` 7\VOZb YO\\ OcQV OZa SW\S 4]ZUS d]\ " SW\hSZ\S\ 0gbSa W\bS`^`SbWS`b eS`RS\ 2Oa ZSbhbS 0gbS S\bVÉZb f/3 VSfORShW[OZ /3 ROa Wab SW\ ES`b RS` XS\aSWba RS` /A 177AbO\RO`R1]RWS`c\U d]\ %4 ZWSUb C\R eW` eWaaS\( OZZS HSWQVS\ RWS ]PS`VOZP d]\ f%4 ZWSUS\ aW\R W\ /A177 \WQVb abO\RO`RWaWS`b 6WS` Wab S\baQVSWRS\R [Wb eSZ QVS[ 1VOÒQbSàSb USO`PSWbSb eW`R /cT RS` ;AEW\R]ea>ZObbT]`[ eW`R PSW RS` 7\ abOZZObW]\ SW\ AbO\RO`R1VOÒQbSàSb OPVÉ\UWU d][ :É\RSàQVZºaaSZ TSabUSZSUb 2WSa Wab W\ ESabSc`]Ô RS` 1VOÒQbSàSb 1> # :SWRS` VOb RWS 2=A0]f c\bS` ;A EW\R]ea SW\S ROd]\ OPeSWQVS\RS 1]RWS`c\U \É[ZWQV 1>&# 7[ /\VO\U 1 aW\R PSWRS HSWQVS\Q]RWS`c\US\ hcaO[[S\ [Wb RS[ C\WQ]RS OcTUS TºV`b 4º` RWS VSfDSàQVZºaaSZc\U /3 TW\RS\ eW` R]`b T]ZUS\RS HSWZS: Codepoint: UnicodeZeichen/Text: %" f/3 { @357AB3@32 A75<

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Stand: 22.12.2005 13:39:00 ))

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3PcTXeTaPaQTXcd]V

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import java.io.*; public class Konvert02 { public static void main(String[] args) throws Exception { BufferedReader eingabe = new BufferedReader( new InputStreamReader(new FileInputStream( "Stream01.txt"), "CP1252")); BufferedWriter ausgabe = new BufferedWriter( new OutputStreamWriter(new FileOutputStream( "Stream02.txt"), "UTF-16")); int zeichen = eingabe.read(); ausgabe.write(zeichen); zeichen = eingabe.read(); ausgabe.write(zeichen); zeichen = eingabe.read(); ausgabe.write(zeichen); zeichen = eingabe.read(); System.out.println((char)zeichen); ausgabe.close(); } } 7\ RS[ >`]UÒ[[ :^]eTac! a]ÙS\ RWS 0`ºQYS\YZOaaS\ 8]_dcBcaTP\ATPSTa Phe >dc_dcBcaTP\ATPSTa Tº` ROa 3\Q]RW\U d]\ &PWb/A177 \OQV CB4$ C\WQ]RS 2Oa 3ÙSP\Wa RWSaS` 9]\dS`bWS`c\U abSVb W\ RS` 2ObSW BcaTP\!cgc 2WSaS 2ObSW Wab W\aUS aO[b 0gbSa U`]z \SPS\ RS\ 0gbSa XS HSWQVS\ S\bVÉZb aWS OcQV SW\ AbScS`hSW QVS\ ÎQd]VT] id\

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Stand: 22.12.2005 13:39:00 ))


ÎQd]V !( 0WbbS É\RS`\ AWS ROa >`]UÒ[[ a] ROaa ROa dWS`bS USZSaS\S HSWQVS\ O[ 0WZRaQVW`[ OcaUSUSPS\ eW`R [Wb T]ZUS\RS[ 0STSVZ(

ausgabe.write((char)zeichen);

2Oa 3ÙSP\Wa RWSaS` /caUOPS Wab RS` R]^^SZbS >TSWZ ZOcb 1VOÒQbSàSb 1>&# ÎQd]V "( >`ºTS\ AWS eWS aWQV RS` 2ObSWW\VOZb RS` /caUOPSRObSW dS`É\RS`b eS\\ AWS Tº` RWS /caUOPS abObb CB4$ RS\ 1VOÒQbSàSb CB4& PS\cbhS\ ÎQd]V #( ;caa Tº` RWS 3W\UOPSRObSW RS` 1VOÒQbSàSb 1> # heW\US\R O\USUSPS\ eS`RS\ ]RS` Wab RWSa RWS AbO\RO`RO\\OV[S- 9O\\ OZa] RWS /\UOPS S\bTOZZS\- 2Oa \ÉQVabS >`]UÒ[[ eW`R RS\ 7\VOZb RS` 2ObSW BcaTP\!cgc OZa dWS` C\WQ]RS HSWQVS\ W\bS`^`SbWS`S\ c\R RWSaS eWSRS` hc`ºQYTºV`S\ W\ /A1772ObS\ ?a^VaP\\ :^]eTac") 4X][TbT] e^] # D]XR^STiTXRWT] d]S X] 0B288 d\fP] ST[] import java.io.*; public class Konvert03 { public static void main(String[] args) throws Exception { BufferedReader eingabe = new BufferedReader( new InputStreamReader(new FileInputStream( "Stream02.txt"), "UTF-16")); BufferedWriter ausgabe = new BufferedWriter( new OutputStreamWriter(new FileOutputStream( "Stream03.txt"), "8859_1")); int zeichen = eingabe.read(); ausgabe.write(zeichen); zeichen = eingabe.read(); ausgabe.write(zeichen); zeichen = eingabe.read(); ausgabe.write(zeichen); zeichen = eingabe.read(); ausgabe.write(zeichen); ausgabe.close(); } } 2Oa 3ÙSP\Wa \OQV /caTºV`c\U RSa >`]UÒ[[a :^]eTac" abSVb W\ RS` 2ObSW BcaTP\"cgc /ca RS\ 0gbSa RS` 3W\UOPSRObSW ec`RS\ eWSRS` RWS " 0gbSa RWS OcQV aQV]\ RWS 2ObSW BcaTP\ cgc VObbS 8Sbhb Yr\\bS\ eW` W\ SW\S[ eSWbS`S\ >`]UÒ[[ RWSaS " 0gbSa OZa 7\bSUSèS`b W\bS` ^`SbWS`S\ c\R O[ 0WZRaQVW`[ OZa 2ShW[OZhOVZ %" OcaUSPS\(

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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3PcTXeTaPaQTXcd]V

?a^VaP\\ :^]eTac#) 8]cTa_aTcXTaT] e^] # 0B2881hcTb P[b 8]cTVTafTac import java.io.*; public class Konvert04 { public static void main(String[] args) throws Exception { InputStream ein = new FileInputStream("Stream03.txt"); DataInput eingabe = new DataInputStream(ein); int zeichen = eingabe.readInt(); System.out.println(zeichen); } }

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Stand: 22.12.2005 13:39:00 ))


Writer writer = new OutputStreamWriter(fos, "UTF-8"); writer.write("testing\u2030"); writer.close(); } }

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writer.write(0x0078);

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))


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Stand: 22.12.2005 13:39:00 ))

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zahl = 25 a + 5 / b a > 3

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zahl = 25; System.out.println(a+ 5 / b); boolean b = a > 3;

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Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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gehalt * 1.15 - 8

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class Ausdruck02 { public static void main(String[] args) { // int z1 = (int)1.23 * 100; // Zuerst 1.23 in int konvertieren int z1 = (int) (123 * 100); // Zuerst multiplizieren System.out.println(z1); } }

#

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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class Arithmetik01 { public static void main(String[] args) { float a = 25.7f; float b = 5f; short x = 212; int y = 148; System.out.println("x System.out.println("x System.out.println("x System.out.println("a

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class Arithmetik02 { public static void main(String[] args) { int y = 15; System.out.println(y % 4); } } $

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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public class Arithmetik11 { public static void main(String args[]) double d1 = 0.17; float f1 = 0.000001f; System.out.println(d1 / f1); System.out.println(d1 * f1); } }

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Stand: 22.12.2005 13:39:00 ))


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import java.math.*; public class BigDecimal01 { public static void main(String args[]) { BigDecimal d1 = new BigDecimal("0.17"); BigDecimal d2 = new BigDecimal("0.000001"); System.out.println(d1.divide(d2)); System.out.println(d1.multiply(d2)); } } ÎQd]V id\ ?a^VaP\\ 1XV3TRX\P[ ÍPS`^`ºTS\ AWS ]P RWS /caUOPS RSa >`]UÒ[[a OcQV [Wb T]ZUS\RS[ /caUOPSPSTSVZ [rUZWQV Wab( System.out.printf("%s", d1.divide(d2)); &!"$ Ad]Sd]V STa 4aVTQ]XbbT 8Sbhb PZSWPb \c` \]QV SW\S 4ÒUS( C\R eWS Wab Sa [Wb RS[ /cT ]RS` /P`c\RS\ RS` 2ShW[OZabSZZS\- 5SÒRS W[ /ZZbOU c\R W[ YOcT[É\\WaQVS\ 0S`SWQV eW`R [Wb SW\S` dS`SW\PO`bS\ 5S\OcWUYSWb RS` 2ShW[OZabSZZS\ VW\bS` RS[ 9][[O USO`PSWbSb 0SW[ /`PSWbS\ [Wb EÉV`c\US\ VOb ROa 3ÙSP\Wa \]`[OZSèSWaS \c` heSW AbSZZS\ VW\bS` RS[ 9][[O RO\OQV eW`R OcT ]RS` OPUS`c\RSb 2WS 9ZOaaS 1XV3TRX\P[ S`ZOcPb RS[ >`]UÒ[[WS`S` RWS d]ZZS 9]\b`]ZZS ºPS` RWS dS` aQVWSRS\S\ ;rUZWQVYSWbS\ RSa @c\RS\a 3a UWPb W\aUSaO[b aWSPS\ dSàQVWSRS\S ;rU ZWQVYSWbS\ 2WSaS aW\R ºPS` `]UÒ[[ Wab SW\ ^`W[WbWdS` 3c`]C[`SQV\S` Sa `SQV\Sb SW\S\ 2; ES`b c[ W\ 3c`] ?a^VaP\\ 4da^ ) ATRW]T] ^W]T SPb 4aVTQ]Xb id ad]ST]

public class Euro01 { public static void main(String args[]) double dm = 100.00; double euro = dm / 1.95583; System.out.println(euro); } }

{

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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import java.math.*; public class Euro02 { public static void main(String args[]) { BigDecimal dm = new BigDecimal("100.00"); BigDecimal kurs = new BigDecimal("1.95583"); BigDecimal euro = dm.divide(kurs,2, BigDecimal.ROUND_HALF_UP); System.out.printf("%s", euro); } }

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import java.math.*; public class BigDecimal03 { public static void main(String[] args) { MathContext def = MathContext.DECIMAL32; BigDecimal start = new BigDecimal(100000); BigDecimal jahre = new BigDecimal(20); BigDecimal zinssatz = new BigDecimal("1.065"); // 6.5% BigDecimal total; total = zinssatz.multiply(jahre).multiply(start); System.out.println("Neues Kapital: " + total.toString()); } }

!

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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public class Vergleich04 { public static void main(String[] args) float zahl1 = 0.1f; zahl1 = zahl1 / 0.0001f; System.out.println(zahl1 == 1000); System.out.println(zahl1); } }

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))


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public class While01 { public static void main(String[] args) int zahl = 1; while (zahl < 5) System.out.println(zahl++); } }

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(( merker2.doc

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public class While99 { public static void main(String[] args) int zahl = 5; while (zahl > 0) System.out.println(zahl--); } }

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

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public class For04 { public static void main(String[] args) { for (int i=0; i < 0;) System.out.println("Ich werde nie ausgegeben"); System.out.println("Programmende"); } } 4OhWb( 2WS 4]ÀQVZSWTS Wab SW\S Y]^TUSabScS`bS SW\S OPeSWaS\RS AQVZSWTS W\ RWSaS` 6W\aWQVb dSÙZSWQVPO` [Wb RS` fWX[TAQVZSWTS eSWZ RWS >`ºTc\U RSa P]]ZSaQVS\ /ca R`cQYa d]` 3W\b`Wbb W\ RWS AQVZSWTS S`T]ZUb 1Tb^]STaWTXcT]) •

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Stand: 22.12.2005 13:39:00 ))


?a^VaP\\ 5â$) 8]XcXP[XbXTad]V PdvTaWP[Q `]UÒ[[ 2WS SàbS c\R RWS R`WbbS 9][^]\S\bS W[ 9]^T SW\S` 4=@AQVZSWTS Yr\\S\ Oca SW\S` /cThÉVZc\U d]\ [SV`S `S\ BSWZOcaR`ºQYS\ PSabSVS\ 2WS SW\hSZ\S\ BSWZOcaR`ºQYS eS`RS\ eWS US\S`SZZ PSW /cThÉVZc\US\ W\ 8OdO RO\\ Rc`QV 9][[O OPUSb`S\\b ?a^VaP\\ 5â%) `ºTc\U OcT AQVZSW TS\S\RS a]ZZbS US\S`SZZ d]\ 5O\hhOVZS\ OPVÉ\UWU US[OQVb eS`RS\ \WQVb hc S[^ TSVZS\ Wab RWS /PTÒUS SW\Sa 5ZSWbY][[OeS`ba 2WSa YO\\ hc 3\RZ]aaQVZSWTS\ TºV`S\ ?a^VaP\\ 5â&) D]VTf^[[cT 4]S[^bbRW[TXUT fTX[ 6[TXcZ^\\PFTac d]VT]Pd public class For07 { public static void main(String[] args)throws Exception for (float i=0; i != 5.0; i=i+0.2f) { System.out.println(i); if (i > 5) break; } } } %$

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))


9INGINZKR[TM\UT9INRKOLKT 5S\Oc a] eWS 740STSVZS USaQVOQVbSZb eS`RS\ Yr\\S\ Wab OcQV SW\S AQVOQVbSZc\U d]\ AQVZSWTS\PSTSVZS\ [rUZWQV h0 YO\\ SW\S EWSRS`V]Zc\U SW\S eSWbS`S EWSRS` V]Zc\U S\bVOZbS\ eS\\ W\\S`VOZP SW\S` Uâ/\eSWac\U W[ @c[^T SW\S eSWbS`S Uâ AQVZSWTS abSVb /ZZS AbScS`PSTSVZS aW\R OcQV PSZWSPWU Y][PW\WS`PO` ?a^VaP\\ 5â') 5âBRW[TXUT bRWPRWcT[]

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public class While08 { public static void main(String[] args) { int zahl1 = 1; while (zahl1 `]UÒ[[ 1aTPZ YPeP a]ZZ SW\S 7bSÒbW]\ [OfW[OZ [OZ Rc`QVTºV`S\ c\R ROPSW HOVZS\ OcTac[[WS`S\ 2WS Ac[[S RS` HOVZS\ RO`T XSR]QV RS\ ES`b \WQVb ºPSàQV`SWbS\ 7ab RWSa RS` 4OZZ eW`R RWS AQVZSWTS d]`hSWbWU OPUSP`]QVS\ ?a^VaP\\ 1aTPZ ) 0QQadRW STa BRW[TXUT fT]] Bd\\T TaaTXRWc import java.util.*; public class Break01 { public static void main(String[] args) { int zahl; int summe = 0; Scanner eingabe = new Scanner(System.in); for (int i=0; i < 10; i++) { System.out.println("Bitte Zahl eingeben: "); zahl = eingabe.nextInt(); if ((summe + zahl) > 1000) { System.out.println("Die Summe ist > 1000"); break; } else { summe = summe + zahl; System.out.println("Summe = " + summe); } } } } Bg^WaQVSa /\eS\Rc\UaPSWa^WSZ Tº` RWS QaTPZ/\eSWac\U Wab RS` /PP`cQV SW\S` 3\R Z]aaQVZSWTS( &

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))


eVWZS b`cS i WT RObSWS\RS QaTPZ) AQVZSWTS PSS\RS\ WT `]PZS[ hc ZraS\( 6ÉcTWU Wab RWS 0SRW\Uc\U Tº` RWS EWSRS`V]Zc\U ROa D]`VO\RS\aSW\ eSWbS`S` 2ObS\ W[ 3W\ UOPSab`][ ]RS` W\ RS` 1]ZZSQbW]\ /Za] eW`R RWSaS 0SRW\Uc\U eâ RS` /caTºV`c\U RSa AQVZSWTS\`c[^Ta US^`ºTb /PS` eWS Wab RWSaS >`ºTc\U [rUZWQV eS\\ R]QV PSW[ SàbS\ 2c`QVZOcT \]QV UO` \WQVb dSàcQVb e]`RS\ Wab hc ZSaS\- 4]ZUS\RSa 0SWa^WSZ a]ZZ RWSaS >`]PZS[ObWY dS`RScbZWQVS\ ?a^VaP\\ =Tgc ) CTgc e^] BhbcT\X] [TbT] d]S eTaPaQTXcT] import java.io.*; public class Next01 { public static void main (String[] args) throws Exception { BufferedReader in = new BufferedReader( new InputStreamReader(System.in)); String str = " "; while (str != null) { System.out.println("Bitte Text eingeben: "); str = in.readLine(); System.out.println("Verarbeitet wird; " + str); } System.out.println("Programmende"); } } &"

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Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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(( merker2.doc

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(( merker2.doc

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(( merker2.doc

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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GregorianCalendar

Field Summary static int AD

Value of the ERA field indicating the common era (Anno Domini), also known as CE.

static int BC

Value of the ERA field indicating the period before the common era (before Christ), also known as BCE.

is a concrete subclass of Calendar and provides the standard calendar system used by most of the world.

GregorianCalendar

Constructor Summary Constructs a default GregorianCalendar using the current time in the default time zone with the default locale.

GregorianCalendar()

GregorianCalendar(int year, int month, int dayOfMonth) Constructs a GregorianCalendar with the given date set in the

default

time zone with the default locale

Method Summary void add(int field, int amount)

Adds the specified (signed) amount of time to the given calendar field, based on the calendar's rules.

Object clone()

Creates and returns a copy of this object.

proteccomputeFields() Converts the time value ted void from the Epoch) to calendar field values.

(millisecond offset

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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2WS /\UOPS RS` 9][^]\S\bS\O\hOVZ YO\\ TSVZS\ eS\\ ROa /`Òg OZa T]`[OZS` >O Ò[SbS` SW\S` ;SbV]RS RSTW\WS`b eW`R SW\ bg^WaQVSa 0SWa^WSZ ROTº` S\bVÉZb RWS \PX] ;SbV]RS R]`b Wab SW\ Ab`W\U/`Òg OZa 3[^TO\UaÔÒ[SbS` RSTW\WS`b /PS` Sa UWPb W\ 8OdO YSW\S ;rUZWQVYSWb RWS /\hOVZ RS` 3ZS[S\bS hc É\RS`\ eS\\ ROa /`Òg SW\[OZ W[ /`PSWbaa^SWQVS` O\USZSUb Wab ;O\ aOUb RWS 6a»vT TX]Tb 0aaPhb Xbc bcPcXbRW ES`RS\ Rg\O[WaQVS /`Òga PS\rbWUb a] [caa RWS AbO\RO`RYZOaaS ETRcâ PS\cbhb eS`RS\ ]RS` SW\S O\RS`S 9ZOaaS RSa 4Ò[Se]`Ya 2^[[TRcX^] ÎQd]V 3àbSZZS\ AWS SW\ \ScSa >`]UÒ[[ [Wb SW\S` @STS`S\hdO`WOPZS\ 2WSaS DO`WOPZS a]ZZ RWS 4ÉVWUYSWb VOPS\ OcT SW\ /`Òg [Wb U[^PcDO`WOPZS\ hc `STS`S\hWS`S\ 2WS @STS `S\hdO`WOPZS a]ZZ RS\ 7RS\bWTWS` iPW[T] VOPS\ 2O\OQV a]ZZ ROa /`Òg W[ /`PSWbaa^SW QVS` O\USZSUb eS`RS\ 0S\rbWUb eS`RS\ " 3ZS[S\bS ;»bd]VbeâbRW[PV public class Array02 { public static void main(String[] args) float[] zahlen; zahlen = new float[4]; } }

{

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int[] zahlenreihe = new zahlenreihe[a + 5];

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int[] zahlenreihe = {5, 3, 4, 17, 21};

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

"

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{

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public class Array04 { public static void main(String[] args) { char[] buchstaben = {'a','b','c','d','e'}; System.out.println(buchstaben[3]); } } ES\\ RS` >`]UÒ[[WS`S` YSW\S /\TO\UaeS`bS d]ÙWPb eS`RS\ RWS 9][^]\S\bS\ SW \Sa /`Òga [Wb AbO\RO`ReS`bS\ W\WbWOZWaWS`b 0SWa^WSZaeSWaS PSY][[S\ \c[S`WaQVS Bg^S\ RS\ ES`b 2Oa T]ZUS\RS >`]UÒ[[ RSTW\WS`b SW\ /`Òg Tº` RWS /cT\OV[S d]\ ATUTaT]iT] PdU >QYTZcT aWSVS OcQV /PaQV\Wbb !" /PS` eSWZ \]QV YSW\S =PXSYbS S`hScUb e]`RS\ aW\R S\bVOZbS\ RWS 9][^]\S\bS\ RS\ /\TO\UaeS`b ]d[[ ?a^VaP\\ 0aaPh$) 3XT :^\_^]T]cT] fTaST] \Xc 3TUPd[cfTacT] eâQT[TVc public class Array05 { public static void main (String args[]) { Object[] obj = new Object[3]; System.out.println(obj[0]); } } !$

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Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

"

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{

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

"% `]UÒ[[ S`hScUb SW\ RW[S\aW]\OZSa /`Òg Tº` RWS A^SWQVS`c\U d]\ Ab`W\Ua 3a a]ZZS\ " AÉbhS dSÒ`PSWbSb eS`RS\ RWS XSeSWZa Oca [SV`S`S\ Er`bS`\ PS abSVS\ 2WS [OfW[OZS /\hOVZ d]\ Er`bS`\ ^`] AObh Wab ! ?a^VaP\\ 0aaPh! ) IfTXSX\T]bX^]P[Tb 0aaPh \Xc >QYTZcT] public class Array21 { public static void main(String[] args) { String[][] woertermatrix = { {"Wort1", "Wort2", "Wort3"}, {"Wort4", "Wort5", "Wort6"}, {"Wort7", "Wort8", "Wort9"}, {"Wort10","Wort11","Wort12"} }; for(int i=0; i`]UÒ[[ a]ZZ Rc`QV ES`bShceSWac\U W\ SW\S` VTbRWPRWcT[cT] UâBRW[TXUT RWS SàbS\ dWS` RWPa DO`WOPZS\ [Wb RS\ 9ZSW\PcQVabOPS\ O R RWS \ÉQVabS\ [Wb RS\ 0cQVabOPS\ S V c\R RWS ZSbhbS\ dWS` DO`WOPZS\ [Wb RS\ HSWQVS\ W Z USTºZZb eS`RS\ 2WS /caUOPS a]ZZ eWS T]ZUb OcaaSVS\( a b c d e f g h i j k l ;»bd]VbeâbRW[PV

public class Array22 { public static void main(String[] args) char[][] zeichen; zeichen = new char[3][4]; char unicode = 97; // Fuellen mit Zeichen for(int i=0; iQYTRc

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z1[2] = 100;

! &

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

# 4abcT[[T] e^] BcaX]V>QYTZcT]

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str = new String("Dies ist eine Zeichenkette");

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

# ITXRWT]ZTccT] P]fT]ST] bcaX]Vb

String str = new String("Dies ist eine Zeichenkette");

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String str = "Dies ist eine Zeichenkette";

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public class String03 { public static void main(String[] args) String vorname = " "; System.out.println(vorname); } }

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


3KZNUJKTJKX)RGYY9ZXOTM

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


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import java.util.Scanner; public class Scanner01 { public static void main(String[] args) { Scanner eingabe = new Scanner(System.in); eingabe.useDelimiter(","); String s =eingabe.next(); System.out.println("Erster Teil: " + s); s =eingabe.next(); System.out.println("Zweiter Teil: " + s); } } ÎQd]V id\ ?a^VaP\\ BRP]]Ta 5SPS\ AWS hc[ BSabS\ PWbbS T]ZUS\RS\ AObh SW\( C[ =PXSYbS hc S`hScUS\ PS\cbhb [O\ ROa AQVZºaaSZe]`b \Se EWQVbWU Wab ROa 9][[O W[ AObh 2Oa 3ÙSP\Wa eW`R aSW\ ROaa RWS SàbS AObhVÉZTbS OZa 3QV] eWSRS` OcaUSUSPS\ eW`R Hc[ /\hSWUS\ RS` heSWbS\ AObhVÉZTbS [caa SW\ eSWbS`Sa B`S\\hSWQVS\ 9][[O SW\USUSPS\ eS`RS\ 2WS 9ZOaaS BRP]]Ta O`PSWbSb [Wb SW\S[ d]ÒcaaQVOcS\RS\ :SaS\ RSa BSfbSa 2Ohc UWPb Sa RWS ;SbV]RS WPb=Tgc 2WSaS ;SbV]RS Wab PSa]\RSà VWZT`SWQV PSW[ 4]`[cZWS `S\ d]\ :SaSaQVZSWTS\ aWS ^`ºTb ]P eSWbS`S 2ObS\ d]`ZWSUS\ c\R RO\\ YO\\ hc[ SWUS\bZWQVS\ :SaS\ RWSaS` 2ObS\ RWS ;SbV]RS ]Tgc PS\cbhb eS`RS\ ?a^VaP\\ BRP]]Ta!) ;TbT] X] BRW[TXUT \Xc WPb=Tgc d]S ]Tgc import java.util.Scanner; class Scanner02 { public static void main(String[] args) { Scanner eingabe = new Scanner(System.in); String zeilenende = System.getProperty("line.separator"); eingabe.useDelimiter(zeilenende); // Delimiter aendern while (eingabe.hasNext()) System.out.println(eingabe.next()); }

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Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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public class Konversion03 { public static void main(String[] args) byte b = 66; System.out.println((char)b); } }

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public class Konversion06

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Stand: 22.12.2005 13:39:00 ))


public static void main(String[] args) short a = 110; float b = 456789.1f; float erg = a * b; System.out.println(erg); }

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Stand: 22.12.2005 13:39:00 ))

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>`]PZS[ObWaQV Wab SW\S C[eO\RZc\U d]\ SW\S[ P`SWbS`S\ 2ObS\bg^ W\ SW\S\ aQV[OZS `S\ Bg^ RS\\ ROPSW Yr\\S\ 7\T]`[ObW]\S\ dS`Z]`S\ USVS\ 2WS d]`VS`WUS ÍPc\U S\bVWSZb SW\ 0SWa^WSZ Tº` RWSaS AWbcObW]\ 2Oa UZSWQVS >`]PZS[ YO\\ OcQV PSW SW\S` ES`bShceSWac\U S\babSVS\ ]RS` PSW RS` \c[S`WQ ^`][]bW]\ d]\ O`WbV[SbWaQVS\ /caR`ºQYS\ Hc\ÉQVab SW\ 0SWa^WSZ Tº` SW\S HceSWac\U SW\S` ZO\US\ DO`WOPZS\ W\ SW\S DO`WOPZS [Wb SW\S[ aQV[OZS`S\ ES`bSPS`SWQV ?a^VaP\\ :^]eTabX^]') 4X] ETabdRW e^] [^]V PdU bWâc eTaZ¶aiT] public class Konversion08 { public static void main(String[] args) long a = 1234567; short b = a; } }

{

2WSaS 1]RWS`c\U TºV`b hc SW\S[ C[eO\RZc\UaTSVZS` [Wb RS` ;SZRc\U( >]aaWPZS Z]aa ]T ^`SQWaW]\ C[ RS\\]QV RWS 9]\dS`bWS`c\U hc S`heW\US\ [caa RWSa d][ >`] UÒ[[WS`S` OcaR`ºQYZWQV Q]RWS`b eS`RS\ c\R heO` Rc`QV 6W\aQV`SWPS\ RSa HWSZRO bS\bgâ W\ `c\RS\ 9ZO[[S`\ ?a^VaP\\ :^]eTabX^]() 4aifX]VT] STa Ch_d\fP]S[d]V SdaRW 2PbcX]V public class Konversion09 { public static void main(String[] args) long a = 123; short b = (short)a; System.out.println(b); } }

{

ÎQd]V \Xc ?a^VaP\\ :^]eTabX^]( 0WbbS É\RS`\ AWS ROa :WbSÒZ W\ HSWZS ! d]\ ! OcT !"#$% c\R ^`ºTS\ AWS ROa 3` USP\Wa 9O\\ TSVZS`T`SW c[USeO\RSZb eS`RS\- 7ab ROa 3ÙSP\Wa aW\\d]ZZ- 2WS 9]\dS`bWS`c\U SW\Sa U`]zS\ ^`W[WbWdS\ 2ObS\bgâ W\ SW\S\ YZSW\S\ ^`W[WbWdS\ 2ObS\bg^ \S\\b [O\ SW\aQV`É\YS\RS 9]\dSàW]\ SW\S\US\RS Bg^c[eO\RZc\U \O``]eW\U Q]\dSàW]\ ESWZ RO[Wb SdS\bcSZZ RS` DS`Zcab d]\ 7\T]`[ObW]\ dS`Pc\ RS\ Wab S`T]ZUb RWS 9]\dSàW]\ \WQVb Ocb][ObWaQV a]\RS`\ \c` OcT OcaR`ºQYZWQVS\ Ec\aQV RSa >`]UÒ[[WS`Sà 2WSaS\ D]ÙO\U \S\\b [O\ 2PbcX]V S\UZ Tº` W\ 4]`[ UWSzS\ ]RS` OcQV SW\S @]ZZS PSaSbhS\ 3`T]`RS`ZWQV Wab RWS Sf^ZWhWbS /\UOPS SW\Sa 1Oab=^SÒb]à( ROa Wab HWSZRObS\bg^ W\ 9ZO[[S`\ 2c`QV 3W\aObh SW\Sa 1Oab=^SÒb]à YO\\ OcQV ROa >`]UÒ[[ :^]eTabX^]& T]`[OZ TSVZS`T`SW SàbSZZb eS`RS\ !#!

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


;»bd]V ida ÎQd]V :^]eTabX^]&

public class Konversion10 i public static void main (String[] args) { ausgeben((int)25.3); } static void ausgeben(int zahl) { System.out.println(zahl); } } 2c`QV RWS Sf^ZWhWbS /\UOPS RSa HWSZbgâ eW`R SW\S C[eO\RZc\U RSa 2ObS\bgâ d][ >`]UÒ[[WS`S` S`hec\US\ 2O[Wb ºPS`\W[[b S` OcQV RWS DSÒ\be]`bc\U ROTº` ]P ROa 3ÙSP\Wa aW\\d]ZZ Wab ]RS` \WQVb ?a^VaP\\ :^]eTabX^]

) Ch_d\fP]S[d]V QTX 6[TXcZ^\\PIPW[T]

public class Konversion11 { public static void main(String[] args) double a = 12345678E300; float b = a; // Fehler ! System.out.println(a); } } ÎQd]V \Xc ?a^VaP\\ :^]eTabX^]

{

2Oa >`]UÒ[[ S\bVÉZb SW\S\ T]`[OZS\ 4SVZS` RS` PSW RS` C[eO\RZc\U TSabUSabSZZb eW`R 0WbbS Y]``WUWS`S\ AWS RS\ ?cSZZbSfb ?a^VaP\\ :^]eTabX^] !) 4g_[XiXcTb 2PbcX]V \Xc 3PcT]eTa[dbc

public class Konversion12 { public static void main(String[] args) { double a; long b = 12345678912348999L; a = b; // korrekt b = (long)a; // Datenverlust System.out.println(b); } } 2WS 0ShSWQV\c\U Bg^c[eO\RZc\U Yr\\bS acUUS`WS`S\ ROaa RWS DS`Yº`hc\U RSa 2ObS\bgâ ROhc TºV`b ROaa RS` \ScS ES`b RS` DO`WOPZS\ \OQV SW\S[ OcaUSTSWZbS\ DS`TOV`S\ S`[WbbSZb eW`R 7\ EW`YZWQVYSWb Wab Sa UO\h SW\TOQV a] ROaa \WQVb c[USeO\ RSZb a]\RS`\ ZSRWUZWQV OPUSaQV\WbbS\ Phe OcTUSTºZZb eW`R

!#"

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

$" ETaP[[VT\TX]Ta]ST :^]eTacXTad]V QTX ATUTaT]ich_T]

8Sbhb T]ZUb \]QV SW\ 0SWa^WSZ ROa hSWUb ROaa OcQV SW\S SèSWbS`\RS 9]\dS`bWS`c\U [O\QV[OZ S`hec\US\ eS`RS\ [caa RO[Wb ºPS`VOc^b SW\ Y]``SYbSa 3ÙSP\Wa S\babS VS\ YO\\ ?a^VaP\\ :^]eTabX^] ") 4afTXcTa]STb 2PbcX]V TaifX]VT] public class Konversion13 { public static void main(String[] args) { double erg; int x = 5; int y = 3; erg = x / y; // Abschneiden System.out.println(erg); erg = (double)x / y; // Korrekt System.out.println(erg); } }

`]PZS[S UWPb Sa eS\\ RWS @STS`S\h SW\S` C\bS`YZOaaS c[USRScbSb eW`R OcT SW\S @STS`S\h RS` =PS`YZOaaS 8SRS C\bS`YZOaaS S\bVÉZb OZZS 3ZS[S\bS RS` =PS`YZOaaS a] ROaa RWSaS C[RScbc\U heO` hc 7\T]`[ObW]\adS`Zcab TºV`S\ YO\\ OPS` bSQV\WaQV c\R T]`[OZ YSW\S >`]PZS[S dS`càOQVb RS\\ RWS AcPYZOaaS YO\\ c\R VOb [W\RSabS\a ROa OZZSa eOa RWS =PS`YZOaaS S\bVÉZb ?a^VaP\\ :^]eTabX^]!) 8\_[XiXcT Ch_P]_Pbbd]V QTX ETaP[[VT\TX]Tad]V public class Konversion20 { public static void main(String[] args) A referenzA = new A(); B referenzB = new B(); referenzA = referenzB; } } class A {} class B extends A {}

{

2WS ES`bShceSWac\U d]\ 0 \OQV / Wab ]V\S >`]PZS[S [rUZWQV ROPSW TW\RSb SW\S Oc b][ObWaQVS 9]\dS`bWS`c\U RSa Bgâ d]\ c\bS\ 0 \OQV ]PS\ / abObb 2OPSW PZSW PS\ W\bS`\ RWS a^ShWSZZS\ 7\T]`[ObW]\S\ ºPS` RWS AcPYZOaaS S`VOZbS\ !##

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


9VKÒGROYOKXKTJK1UT\KXZOKX[TMHKO8KLKXKT`Z_VKT

5O\h O\RSà Wab RWS AWbcObW]\ PSW SW\S` @STS`S\h OcT RWS =PS`YZOaaS RWS \c\ OZa @STS `S\h W\bS`^`SbWS`b eS`RS\ a]ZZ RWS OcT SW\ ROd]\ OPUSZSWbSbSa =PXSYb hSWUb 2WS C\ bS`YZOaaS S\bVÉZb [SV` 7\T]`[ObW]\S\ /bb`WPcbS c\R]RS` ;SbV]RS\ OZa RWS Ac^S` YZOaaS 2SaeSUS\ eW`R RWSaS` DSàcQV d][ 1][^WZS` OPUSZSV\b ?a^VaP\\ :^]eTabX^]! ) ATUTaT]ich_ b_TiXP[XbXTaT] public class Konversion21 { public static void main(String[] args) { A referenzA = new A(); B referenzB = new B(); referenzB = referenzA; // Fehler, inkompatibel } } class A {} class B extends A {} 2S` >`]UÒ[[WS`S` YO\\ OPS` OcQV VWS` ROa 1OabW\U S`heW\US\ US\Oc eWS PSW RS\ ^`W[WbWdS\ 2ObS\bg^S\ 2WS 9]\dS`bWS`c\U eW`R OcQV PSW @STS`S\hbg^S\ S`hec\US\ Rc`QV /\UOPS RSa 1Oab=^SÒb]à 2S` 1Oab=^SÒb]` PSabSVb Oca RS[ _TaPcâ QTX ATUTaT]ich_T]

public class Konversion22 { public static void main(String[] args) A referenzA = new A(); B referenzB = new B(); referenzB = (B)referenzA; } } class A {} class B extends A {}

{

8Sbhb Wab SW\S TSVZS`T`SWS C[eO\RZc\U [rUZWQV /PS`( 0SW[ DSàcQV ROa >`]UÒ[[ OcahcTºV`S\ UWPb Sa SW\S\ /PP`cQVTSVZS` @c\BW[S3``]`( 1Oab3fQS^bW]\ 2S` 5`c\R Tº` RWSaS\ 4SVZS`( EW` VOPS\ dSàcQVb Oca SW\S[ @STS`S\hbg^ RS` OZZUS [SW\S\ 9ZOaaS / SW\S\ a^ShWOZWaWS`bS\ Bg^ RS` 9ZOaaS 0 hc [OQVS\ 2Oa USVb \WQVb ]RS` PSaaS` USaOUb ROa USVb \c` eS\\ Sa aWQV OcQV eW`YZWQV c[ RWSaS\ a^ShWOZWaWS` bS\ Bg^ VO\RSZb ;SV` AQVSW\ OZa ASW\ ZÉzb RWS 8D; \WQVb hc !#$

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

$# B_TiXP[XbXTaT]ST :^]eTacXTad]V QTX ATUTaT]ich_T]

EWQVbWUS @SUSZ( `]UÒ[[WS`S` aWQV UO\h aWQVS` Wab ROaa RWS @STS`S\h W\ EOV`VSWb SW\S @STS`S\h OcT RWS AcPYZOaaS Wab RO`T ROa 1OabW\U S`hec\US\ eS`RS\ O\RS`\TOZZa TºV`b RS` Sf^ZWhWbS 1Oab hc SW\S[ @c\BW[S4SVZS` FXT ZP]] bXRWTaVTbcT[[c fTaST] SPbb ZTX]T ;PdUiTXcUTW[Ta T]cbcTWT]. 3a UWPb SW\S\ =^SÒb]` [Wb RSaaS\ 6WZTS hc` :OcThSWb ºPS`^`ºTb eS`RS\ YO\\ OcT eSZQVS\ 2ObS\bg^ SW\S @STS`S\h dSèSWab( X]bcP]RTÛ 2WSa Wab RS` R`W\US\R S[^ T]VZS\S ESU c[ aWQVS` hc abSZZS\ ROaa YSW\ TOZaQVSa 1OabW\U Rc`QVUSTºV`b eW`R ?a^VaP\\ :^]eTabX^]!") ;PdUiTXcch__a¶Ud]V SdaRW X]bcP]RTÛ public class Konversion23 { public static void main(String[] args) { A referenzA = new A(); B referenzB = new B(); if (referenzA instanceof B) referenzB = (B)referenzA; else System.out.println("Kein Casting möglich"); } } class A {} class B extends A {} 2Oa \ÉQVabS 0SWa^WSZ RS[]\ab`WS`b PSWRS /`bS\ RS` 9]\dS`bWS`c\U d]\ @STS`S\hS\ ?a^VaP\\ :^]eTabX^]!#) ETaP[[VT\TX]Tad]V d]S B_TiXP[XbXTad]V SdaRW 2PbcX]V

import java.awt.Point; public class Konversion24 { public static void main(String[] args) Point p1, p2; Object object;

{

p1 = new Point(100,200); p2 = new Point(300,400); object = new Object(); object = p1; // generalisierende Konvertierung p2 = (Point)object; // spezialisierende Konvertierung System.out.println(p2); } } !#%

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


:_V;S]GTJR[TM`]OYINKTKOTLGINKT[TJ8KLKXKT`Z_VKT

7\ 8OdO Wab Sa \WQVb S`ZOcPb SW\TOQVS Bg^S\ W\ @STS`S\hbg^S\ hc QOabS\ ]RS` c[US YSV`b 3a Wab OZa] h0 \WQVb [rUZWQV [Wb 6WZTS SW\Sa 1Oab=^SÒb]à Oca SW\S[ SW\TO QVS\ U[^PcBg^ SW\S\ 9ZOaaS\bg^ 3^dQ[T hc [OQVS\ 2]QV Sa UWPb O\RS`S ;rUZWQVYSWbS\ c[ •

Oca SW\TOQVS\ Bg^S\ RWS S\ba^`SQVS\RS\ @STS`S\hbg^S\ hc S`hScUS\ Phe

•

Oca @STS`S\hbg^S\ RWS S\ba^`SQVS\RS\ ^`W[WbWdS\ Bg^S\ VSÒcahchWSVS\

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OÒ[SbS` OYhS^bWS`b c\R YSW \S ^`W[WbWdS\ 2ObS\bg^S\ hcZÉaab 7\ RS\ [SWabS\ 4ÉZZS\ S`T]ZUb RO\\ ROa 3W\Ô QYS\ eÒ^^W\U P]fW\U Ocb][ObWaQV RV Oca RS[ SW\TOQVS\ 2ObS\bg^ eW`R ]V\S PSa]\RS`S D]`YSV`c\U Rc`QV RS\ >`]UÒ[[WS`S` SW\ @STS`S\hbg^ RS` EÒ^^S`YZOaaS S`hScUb 2WSaS` D]ÙO\U eW`R /cb]P]fW\U US\O\\b C[USYSV`b S`T]ZUb OcQV ROa /caÔQYS\ c\P]fW\U W\ RS\ [SWabS\ 4ÉZZS\ Ocb][ObWaQV W\bBg^

=PXSYb

@STS`S\hD

/PP #( 0SWa^WSZ Tº` ROa EÒ^^S\ SW\S` ^`W[WbWdS\ W\bDO`WOPZS\ 7\ [O\QVS\ AWbcObW]\S\ [caa ROa /`PSWbS\ [Wb RS\ EÒ^^S`9ZOaaS\ OPS` OcaR`ºQY ZWQV Q]RWS`b eS`RS\ 2O[Wb hc\ÉQVab SW\[OZ ^ÒYbWaQV USºPb eS`RS\ YO\\ eWS [O\ [Wb EÒ^^S`YZOaaS\ O`PSWbSb hSWUb ROa >`]UÒ[[ FaP__Ta eWS SW\S UO\hS HOVZ OZa =PXSYb S`hScUb c\R dSÒ`PSWbSb eW`R ?a^VaP\\ FaP__Ta ) 6P]iiPW[ P[b TX]UPRWTa 3PcT]ch_ d]S P[b ATUTaT]ich_ class Wrapper01 { public static void main(String[] args) int zahl1 = 15; // Integer zahl1 = new Integer(15); System.out.println(zahl1); } }

{

!#&

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

$$ Ch_D\fP]S[d]V ifXbRWT] TX]UPRWT] d]S ATUTaT]ich_T]

ÎQd]V id\ ?a^VaP\\ FaP__Ta 3àSbhS\ AWS RWS 2STW\WbW]\ RSa SW\TOQVS\ Bgâ W\ RS` HSWZS ! Rc`QV RWS UZSWQVeS`bWUS 2STW\WbW]\ W\ HSWZS " c\R bSabS\ AWS ROa 3ÙSP\Wa Ò\RS`b aWQV ROa 3ÙSP\Wa- HcaO[[S\TOaac\U( 3W\S 9]\dS`bWS`c\U heWaQVS\ @STS`S\hbg^ c\R SW\TOQVS[ Bg^ Wab W\ 8OdO \WQVb [rUZWQV E]VZ [rUZWQV Wab ROa 3W\ÔQYS\ P]fW\U d]\ SW\TOQVS\ Bg ^S\ W\ ST] T]cb_aTRWT]ST] Ch_ RS` ROhcUSVr`S\RS\ EÒ^^S`YZOaaS Phe ROa /caÔQYS\ c\P]fW\U d]\ @STS`S\hbg^S\ c[ eWSRS` SW\TOQVS Bg^S\ hc PSY][ [S\

'[ZUHUÔTM;THUÔTM

2Oa 3W\ ]RS` /caÔQYS\ S`T]ZUb W[[S` RO\\ Ocb][ObWaQV eS\\ 8OdO S`YS\\b ROaa RWSa \]beS\RWU c\R [rUZWQV Wab 0SWa^WSZ( ES\\ ^`W[WbWdS Bg^S\ O\ RWS ;SbV]RS _aX]cU ºPSÙSPS\ eS`RS\ RO\\ eS`RS\ RWSaS SW\TOQVS\ Bg^S\ W\ =PXSYbS RS` XSeSW ZWUS\ 9ZOaaS c[USeO\RSZb aWS eS`RS\ SW\USÔQYb W\ SW\S 0]f OcT S\UZWaQV( Oc b]P]fW\U ]RS` Ocb]eÒ^^W\U /cQV RS` c[USYSV`bS D]ÙO\U ROa 3\bÔQYS\ ] RS` c\P]fW\U YO\\ S`T]ZUS\ ]V\S ROaa RS` >`]UÒ[[WS`S` ROTº` PSa]\RS`S D]` YSV`c\US\ b`STTS\ [caa ?a^VaP\\ 1^gX]V ) 0dc^\PcXbRWTb 1^gX]VD]Q^gX]V

class Boxing01 { public static void main(String[] args) int zahl1 = 15; Integer zahl2 = new Integer(25); System.out.println(zahl1 + zahl2); zahl1 = zahl2; System.out.println(zahl1); } }

{

// Autoboxing // Auto-Unboxing

1UT\KXZOKXKTSOZYVKÒKRRKT3KZNUJKT

EWS PS`SWba [SV`TOQV PSb]\b PWSbSb RWS 8OdOA^ÒQVS YSW\S ;rUZWQVYSWb c[ [Wb SW \S[ 1OabW\U=^SÒb]` heWaQVS\ SW\TOQVS\ c\R @STS`S\hbg^S\ hc Y]\dS`bWS`S\ /PS` Sa UWPb ;SbV]RS\ hc[ C[eO\RSZ\ d]\ Ab`W\U]PXSYbS\ W\ ^`W[WbWdS Bg^S\ c\R OcQV ;SbV]RS\ c[ SW\TOQVS Bg^S\ W\ Ab`W\U]PXSYbS hc Y]\dS`bWS`S\ D\fP]ST[] e^] TX]UPRWT] Ch_T] X] BcaX]V^QYTZcT 2WS EÒ^^S`YZOaaS\ S\bVOZbS\ SW\S c^BcaX]V;SbV]RS RWS SW\S Ab`W\U@S^`ÉaS\bObW]\ Tº` SW\S\ SW\TOQVS\ 2ObS\bg^ ZWSTS`b EW` eWaaS\ OcQV PS`SWba ROaa c^BcaX]V d]\ PS abW[[bS\ ;SbV]RS\ Ocb][ObWaQV OcTUS`cTS\ eW`R a] h0 d]\ RS` _aX]c[];SbV]RS !#'

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))


?a^VaP\\ :^]eTac`]UÒ[[ a] OP ROaa RS` BcaX]V W\ SW\S\ SW\TOQVS\ U[^PcBg^ c[ USeO\RSZb eW`R

!$

(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

$$ Ch_D\fP]S[d]V ifXbRWT] TX]UPRWT] d]S ATUTaT]ich_T]

;»bd]VbeâbRW[PV

class KonvertMethod04 { public static void main(String[] args) String str = "153E5"; float zahl = Float.parseFloat(str); System.out.println(zahl); } }

{

IdbP\\T]UPbbd]V >`W\hW^WSZZ Wab PSW[ /`PSWbS\ [Wb DO`WOPZS\ RS` d][ >`]UÒ[[WS`S` W\ RS` 2SYZOÒbW ]\ TSabUSZSUbS 2ObS\bg^ ab`S\U SW\hcVOZbS\ 2WSa eW`R d][ 1][^WZS` ºPS`^`ºTb c\R aWQVSÙSabSZZb >`W\hW^WSZZ Yr\\S\ HceSWac\US\ ]RS` >OÒ[SbS`ºPSÙOPS\ \c` Rc`QV USTºV`b eS`RS\ eS\\ RWS 2ObS\bg^S\ SfOYb ºPS`SW\abW[[S\ AbW[[S\ 2ObS\bg^ d]\ AS\RS` c\R 3[^TÉ\US` \WQVb ºPS`SW\ a] YO\\ W\ PSabW[[bS\ 4ÉZZS\ SW\S Ocb] [ObWaQVS 2ObS\bg^/\Ôaac\U S`T]ZUS\ 2Oa USaQVWSVb OPS` \c` eS\\ RWS 9]\dSàW ]\ ]V\S 5STOV`S\ d]\ 7\T]`[ObW]\adS`Zcab ]RS` TÉZaQVc\U [rUZWQV Wab C\R ROTº` UWPb Sa ab`S\US @SUSZ\( •

PSW SW\TOQVS\ Bg^S\( C[eO\RZc\U \c` d]\ YZSW\ \OQV U`]z

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(( merker2.doc

Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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Stand: 22.12.2005 13:39:00 ))

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(( merker2.doc

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