Java

Install openjdk

See http://openjdk.java.net/install/. On Ubuntu, I can use

sudo apt-get install openjdk-7-jdk

Some projects written in Java

• FastQC The code uses Java 2D graphics APIs in awt like BasicStroke, Color, Dimension, Graphics, Graphics2D, RenderingHints and javax.swing.JPanel. It also uses java.util.Vector.

Tutorial

• Oracle Tutorial
• Head First Java
• Programming by Doing
• Introduction to programming in Java
• Package, classpath

Compile a simple Java program

javac Example.java # generate Example.class; bytecode version of the program
java Example   # run bytecode in Java Virtual Machine

Get a hello world program from http://docs.oracle.com/javase/tutorial/getStarted/cupojava/unix.html.

Swing

Hello World Example

• http://docs.oracle.com/javase/tutorial/uiswing/start/compile.html

For example, create a new subdirectory 'start' and put HelloWorldSwing.java there. Then we can build and run the swing program by

javac start/HelloWorldSwing.java # Or javac HelloWorldSwing.java if we are in start directory
java start.HelloWorldSwing

Quit Button Example

• http://zetcode.com/tutorials/javaswingtutorial/

Note that it is necessary to create the directory com/zetcode according to package statement in java code. Also the filename must be consistent with the class name.

mkdir com
mkdir com/zetcode
nano com/zetcode/QuitButtonExample.java
javac com/zetcode/QuitButtonExample.java
java com/zetcode/QuitButtonExample