package math;

public class MyMath {
    public int multi(int number1, int number2) {
        return number1 * number2;
    }
}

package test;

import math.MyMath;

public class Main {
    public static void main(String[] args) {
        MyMath math = new MyMath();
        System.out.println("Result is: " + math.multi(5, 10));
    }
}

<?xml version="1.0"?>
<project name="Ant-Test" default="main" basedir=".">
    <!-- Sets variables which can later be used. -->
    <!-- The value of a property is accessed via ${} -->
    <property name="src.dir" location="src" />
    <property name="build.dir" location="bin" />
    <property name="dist.dir" location="dist" />
    <property name="docs.dir" location="docs" />

    <!-- Deletes the existing build, docs and dist directory-->
    <target name="clean">
        <delete dir="${build.dir}" />
        <delete dir="${docs.dir}" />
        <delete dir="${dist.dir}" />
    </target>

    <!-- Creates the  build, docs and dist directory-->
    <target name="makedir">
        <mkdir dir="${build.dir}" />
        <mkdir dir="${docs.dir}" />
        <mkdir dir="${dist.dir}" />
    </target>

    <!-- Compiles the java code (including the usage of library for JUnit -->
    <target name="compile" depends="clean, makedir">
        <javac srcdir="${src.dir}" destdir="${build.dir}">
        </javac>

    </target>

    <!-- Creates Javadoc -->
    <target name="docs" depends="compile">
        <javadoc packagenames="src" sourcepath="${src.dir}" destdir="${docs.dir}">
            <!-- Define which files / directory should get included, we include all -->
             <fileset dir="${src.dir}">
                <include name="**" />
             </fileset>
        </javadoc>
    </target>

    <!--Creates the deployable jar file  -->
    <target name="jar" depends="compile">
        <jar destfile="${dist.dir}\de.vogella.build.test.ant.jar" basedir="${build.dir}">
            <manifest>
                <attribute name="Main-Class" value="test.Main" />
            </manifest>
        </jar>
    </target>

    <target name="main" depends="compile, jar, docs">
        <description>Main target</description>
    </target>

</project>

# run the build
ant -f build.xml

# run ant with defaults (build.xml file and the default target)
ant

<?xml version="1.0"?>
<project name="Ant-Test" default="Main" basedir=".">
    <!-- Sets variables which can later be used. -->
    <!-- The value of a property is accessed via ${} -->
    <property name="src.dir" location="src" />
    <property name="lib.dir" location="lib" />
    <property name="build.dir" location="bin" />

    <!--
        Create a classpath container which can be later used in the ant task
    -->
    <path id="build.classpath">
        <fileset dir="${lib.dir}">
            <include name="**/*.jar" />
        </fileset>
    </path>

    <!-- Deletes the existing build directory-->
    <target name="clean">
        <delete dir="${build.dir}" />
    </target>

    <!-- Creates the  build  directory-->
    <target name="makedir">
        <mkdir dir="${build.dir}" />
    </target>

    <!-- Compiles the java code -->
    <target name="compile" depends="clean, makedir">
        <javac srcdir="${src.dir}" destdir="${build.dir}" classpathref="build.classpath" />
    </target>



    <target name="Main" depends="compile">
        <description>Main target</description>
    </target>

</project>

<!-- Write the classpath to the console. Helpful for debugging -->
<!-- Create one line per classpath element-->
<pathconvert pathsep="${line.separator}" property="echo.classpath" refid="junit.class.path">
</pathconvert>
<!-- Write the result to the console -->
<echo message="The following classpath is associated with junit.class.path " />
<echo message="${echo.classpath}" />

<fail message="PDF file was not created.">
   <condition>
      <not>
          <available file="${pdf.dir}/path/book.pdf" />
      </not>
    </condition>
</fail>

<fail message="Files are missing.">
    <condition>
        <not>
            <resourcecount count="2">
                <fileset id="fs" dir="." includes="one.txt,two.txt"/>
            </resourcecount>
        </not>
    </condition>
</fail>

<!-- Location of a configuration -->
<property name="my.config" value="../my-config.xml"/>
<makeurl file="${my.config}" property="my.config.url"/>

<param name="highlight.xslthl.config" expression="${my.config.url}"/>

<target name="regular-expressions">
    <!-- Replace tabs with two spaces -->
    <replaceregexp flags="gs">
        <regexp pattern="(\t)" />
        <substitution expression="  " />
        <fileset dir="${outputtmp.dir}/">
            <include name="**/*" />
        </fileset>
    </replaceregexp>
</target>