PreliminariesPreliminaries

CS 310: Object-oriented CS 310: Object-oriented ProgrammingProgramming

Java API

Course FocusCourse Focus

Object-oriented Software DevelopmentObject-oriented Software Development Problem Solving TechniquesProblem Solving Techniques Object-oriented Programming ConceptsObject-oriented Programming Concepts

Classes and ObjectsClasses and Objects EncapsulationEncapsulation InheritanceInheritance PolymorphismPolymorphism

GUI and Applets GUI and Applets Java Programming LanguageJava Programming Language

Tools You Will NeedTools You Will Need

Tools required for this class.Tools required for this class. Computer with an Internet connection Computer with an Internet connection Java SDK (J2SE v. 1.5) Java SDK (J2SE v. 1.5) Email account Email account USB drive (thumb drive)USB drive (thumb drive)

Java SDK (Software Dev. Java SDK (Software Dev. Kit)Kit)

Available free from Sun MycrosystemsAvailable free from Sun Mycrosystems http://java.sun.com/j2se/1.5.2/http://java.sun.com/j2se/1.5.2/

download.htmldownload.html Download J2SE v. 1.5 SDK (v. 1.6 is also Download J2SE v. 1.5 SDK (v. 1.6 is also

OK)OK) How to install Java SDKHow to install Java SDK

http://www.rkmaruyama.net/class/310/http://www.rkmaruyama.net/class/310/howto/310howto.htmlhowto/310howto.html

jGRASP IDEjGRASP IDE

JGRASP—an integrated development JGRASP—an integrated development environment, which allows you to environment, which allows you to edit source code, compile, and run edit source code, compile, and run the program.the program.

Available free from Available free from jGRASPjGRASP(click “download” in left column)(click “download” in left column)

Need to have Java SDK installed firstNeed to have Java SDK installed first

Testing SDKTesting SDK

Create FolderCreate Folder Each java project should be in separate Each java project should be in separate

folderfolder C:\310\practice\test\C:\310\practice\test\

Use text editor or Java IDE to write Use text editor or Java IDE to write source codesource code Java source code file has extension Java source code file has extension .java.java File name is File name is case-sensitivecase-sensitive..

JCreator IDEJCreator IDE

JCreator—an integrated development JCreator—an integrated development environment, which allows you to edit environment, which allows you to edit source code, compile, and run the source code, compile, and run the program.program.

Available free from XINOXAvailable free from XINOXhttp://www.jcreator.com/http://www.jcreator.com/

Need to have Java SDK installed firstNeed to have Java SDK installed first How to install JCreatorHow to install JCreator

http://www.rkmaruyama.net/class/310http://www.rkmaruyama.net/class/310/310howto/310howto

Java Virtual MachineJava Virtual Machine

Source Code Bytecode Output

Text Editor Compiler JVM

Sample Source CodeSample Source Code

Write the following code exactly, and Write the following code exactly, and save it as save it as HelloTest.javaHelloTest.java..

class HelloTest{ public static void main(String[] args){ System.out.print("Hello, world.”); })

Compile Source CodeCompile Source Code

Assume:Assume: JDK is installed in D:\jdk15JDK is installed in D:\jdk15

Set path--To make JDK compiler Set path--To make JDK compiler visible in any foldervisible in any folder Set path D:\jdk15\binSet path D:\jdk15\bin

Check pathCheck path C:\> pathC:\> path -- DOS command -- DOS command D:\jdk15\bin -- pathD:\jdk15\bin -- path

Create Byte CodeCreate Byte Code

Compile the source code to create a Compile the source code to create a byte codebyte code, as follows., as follows. D:\310\hello> javac HelloTest.javaD:\310\hello> javac HelloTest.java

If there are syntax errors, correct the If there are syntax errors, correct the source code and recompile.source code and recompile.

The result of a successful compilation The result of a successful compilation is a byte code file named is a byte code file named HelloTest.classHelloTest.class..

Run ProgramRun Program

Run the program as follows:Run the program as follows: D:310\hello> D:310\hello> java HelloTestjava HelloTest

Useful DOS CommandsUseful DOS Commands C:\> cd 310C:\> cd 310 -- Go down one level to -- Go down one level to

310 folder 310 folder C:\310> cd ..C:\310> cd .. -- Go up one level, to C:\>-- Go up one level, to C:\> C:\310> D:C:\310> D: -- Change to drive D-- Change to drive D

C:\310\> dirC:\310\> dir -- List all files in the folder -- List all files in the folder C:\310\> del fileName.extC:\310\> del fileName.ext -- Delete -- Delete

fileName.ext fileName.ext C:\310\> md aFolderC:\310\> md aFolder -- Create -- Create

aFolder aFolder C:\310\> rd oldFolderC:\310\> rd oldFolder -- Delete -- Delete

oldFolderoldFolder

JAR FilesJAR Files

JAR Files—Java Archive filesJAR Files—Java Archive files To package several files into one fileTo package several files into one file To compress themTo compress them For easier transmission over the InternetFor easier transmission over the Internet

JAR Files (cont.)JAR Files (cont.)

SyntaxSyntaxjar {options} jar-file-name file1 file2 file3jar {options} jar-file-name file1 file2 file3

Assume: Assume: Mypro.java, Mypro.class, Mypro.java, Mypro.class, Show.htmlShow.html exist in current folder. exist in current folder.

jar cf rkm.jar Mypro.jar Mypro.class show.htmjar cf rkm.jar Mypro.jar Mypro.class show.htm

For more details refer toFor more details refer to HowToHowTo Create Jar Create Jar..http://www.rkmaruyama.net/class/310/310howtohttp://www.rkmaruyama.net/class/310/310howto