Using ANT on Raspberry Pi

Install the Java Runtime

pi@raspberrypi ~/testProject $ sudo apt-get install openjdk-7-jre

Install the Java Development Kit

pi@raspberrypi ~/testProject $ sudo apt-get install openjdk-7-jdk

Check where Java is installed

pi@raspberrypi ~/testProject $ which java

It was installed in /usr/bin/java on my Pi
Set up the JAVA_HOME environment variable

pi@raspberrypi ~/testProject $ export JAVA_HOME=/usr 

Install ANT

pi@raspberrypi ~/testProject $ sudo apt-get install ant

Make a directory for the Java project

pi@raspberrypi ~/testProject $ mkdir ~/testProject 

Change to the testProject directory

pi@raspberrypi ~/testProject $ cd ~/testProject 

Create a simple Java file Test.java. This just prints a message saying "Test.java is running".

public class Test {
        public static void main(String[] args) {
                System.out.println("Test.java is running");
        }
}

Create an ANT build file, build.xml

There is just one target in the build file to compile the source code. You can run the build file with ant by just running ant

pi@raspberrypi ~/testProject $ ant

After this finishes building, check the contents of the directory for the java class file

pi@raspberrypi ~/testProject $ ls
build.xml Test.class Test.java

Run the Java program

pi@raspberrypi ~/testProject $ java Test
Test.java is running