Install Sun JDK and JRE
Open terminal and type the following commands$ sudo apt-get install sun-java6-bin sun-java6-jre sun-java6-jdk
$ sudo vi /etc/jvm
Add following line at the top:
/usr/lib/jvm/java-6-sun
Set up environment:
$ echo 'export JAVA_HOME=/usr/lib/jvm/java-6-sun' >> ~/.bash_profile
$ echo 'export PATH=$PATH:$JAVA_HOME/bin' >> ~/.bash_profile
$ . ~/.bash_profile
Make sure you see correct JAVA version:
$ java -version
Sample output:
java version "1.6.0_06" Java(TM) SE Runtime Environment (build 1.6.0_06-b02) Java HotSpot(TM) Server VM (build 10.0-b22, mixed mode)
Install Eclipse
Type the following command to install extensible Tool Platform, Java IDE, Java Development Tools plug-ins for Eclipse:$ sudo apt-get install eclipse eclipse-jdt
How do I start eclipse?
Click on Applications > Programming > EclipseOR type the following command at shell prompt:
$ eclipse &
You should see an eclipse splash screen followed by workspace launcher:
Your first java program using Eclipse
Click Ok to load IDE. Close welcome screen. Click on Windows > Open perspective > Select Java .Step # 1: Create a project
You need to create a project to put all .java and related project files. Click on File > New > Project > Select Java ProjectClick Next > Type Project name "HelloWorld" > Click on Finish:
Step # 3: Create a new class
Now you need add a new class called HelloWorld. Click on File > New > Class > Set class name to "HelloWorld" > Select the checkbox to create the main() method > click Finish button:Step # 3: Type the code
Type the following code inside main() method:System.out.println("Hello world!\n");Press CTRL + S to save program (or visit File > Save option).
Step # 4: Run your first java application
To run your program Select HelloWorld.java from left panel. Click on Run > Run As > Java Application :The Console view should appear at the bottom of the IDE to display the "Hello, world!" output.
Via [CyberCiti]
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