Ant Tutorial: Hello World with Apache Ant(1)

/* source code from */

package oata;

public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello World");
    }
}

build.xml:

<project name="HelloWorld" basedir="." default="main">

  <property name="src.dir" value="src"/>
  <property name="build.dir" value="build"/>
  <property name="classes.dir" value="${build.dir}/classes"/>
  <property name="jar.dir" value="${build.dir}/jar"/>

  <property name="main-class" value="oata.HelloWorld"/>


  <target name="clean">
    <delete dir="${build.dir}"/>
  </target>

  <target name="compile">
    <mkdir dir ="${classes.dir}"/>
    <javac srcdir="${src.dir}" destdir="${classes.dir}"/>
  </target>

<target name="jar" depends="compile">
  <mkdir dir="${jar.dir}"/>
  <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}">
    <manifest>
      <attribute name="Main-Class" value="${main-class}"/>
    </manifest>
  </jar>
</target>

<target name="run" depends="jar">
  <java jar="${jar.dir}/${ant.project.name}.jar" fork="true"/>
</target>

<target name="clean-build" depends="clean,jar"/>

<target name="main" depends="clean,run"/>

</project>