How to run java program with ant

Question

I am a complete noob in java and I want to know how do you run a java program after you use build.xml. I am using 'cmd' and I got the message BUILD SUCCESSFUL after compiling (?) Now what should I do to run the program ?

Sorry If I am not allowed to post this type of question. I couldn't find any rules.

Thanks in advance :)

Edit: it created a .war file. how do I execute it ?

Answer 1

I assume that this is a simple "Hello, World" Java program ( HelloWorld.java ) and that the HelloWorld.java , build.xml and the HelloWorld.class (to be generated) are in the current directory ( . )

HelloWorld.java file :

public class HelloWorld {

public static void main(String[] args) {
    // Prints "Hello, World" to the terminal window.
    System.out.println("Hello, World");
}

}

Create two targets : compile and run in your build.xml file :

<project name="Hello World" basedir=".">

<target name="compile">
       <javac srcdir="." includeantruntime="true" includes="HelloWorld.java" destdir="."></javac>
</target>

<target name="run" depends="compile">
       <java classname="HelloWorld" fork="true"></java>
</target>

</project>

Now you simply need to navigate to the current directory in your terminal and run :

ant run