Super basic ANT build for a standard java project. Uses a src/test/bin/lib/dist project structure.

build.xml

<project name="Project" default="dist" basedir=".">
    
    <property name="version" value="0.0"/>
    <property name="src"   location="src"/>
    <property name="build" location="bin"/>
    <property name="dist"  location="dist"/>
	<property name="test"  location="test"/>
    <property name="lib"  location="lib"/>

    <path id="project.class.path">
        <pathelement path="${build}"/>
        <fileset dir="${lib}">
            <include name="**/*.jar"/>
        </fileset>
    </path>

	<!-- Test and Generate Runtime -->
	<target name="test-deploy" 
        depends="test,dist" 
        description="Test and generte distribution" />

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

    <target name="init" depends="clean">
        <mkdir dir="${build}"/>
    </target>    

    <target name="compile" depends="init">
        <javac includeantruntime="false" 
                srcdir="${src}" destdir="${build}">
            <classpath refid="project.class.path" />
        </javac>
    </target>
	
	<target name="compile-test" depends="init">
        <javac includeantruntime="true" 
        	   srcdir="${test}" destdir="${build}">
            <classpath refid="project.class.path" />
        </javac>
    </target>

    <target name="dist" depends="compile">
        <mkdir dir="${dist}"/>
        <jar jarfile="${dist}/project-${version}.jar" basedir="${build}"/>
    </target>

	<target name="test" depends="compile,compile-test">
		<junit printsummary="yes" haltonfailure="yes" showoutput="yes">
			<classpath refid="project.class.path" />
		    <batchtest fork="yes">
		    	<fileset dir="${test}">
		    	    <include name="**/*Test*.java"/>	
	    		</fileset>
	        </batchtest>
		</junit>
	</target>
</project>