Basic skeleton (build.xml):

<project name="projName" default="def-target" basedir="/base/path">
  <target name="targName" depends="a,b" if="prop-set" unless="prop-unset">
    <property name="propName" value="src" />
  </target>
</project>

Commands:

• <deltree dir="dir" />

• <mkdir dir="dir" />

• <javac srcdir="${sourceDir}" destdir="${outputDir}" />

• <taskdef name="customTask" classname="classFile" />

Custom Tasks:

1. Create a Java class that extends org.apache.tools.ant.Task.
2. For each attribute, write a "public void setAttributename" setter method that takes a single argument.
3. If the task supports character data (text nested between the start end end tags), write a "public void addText(String)" method.

4. Write a "public void execute()" that throws a BuildException.