build.xml 学习

<?xml version = "1.0" encoding="GB2312" ?>
<project default = "main" basedir = "." >
 <property name = "srcpath" value = "sdkongkong"/>
 <property name = "classpath" value = "build/classes"/>
 <target name = "init">
   <mkdir dir = "${classpath}"/>
 </target>
 <target name = "main" depends = "init">
   <javac srcdir = "${srcpath}" destdir = "${classpath}"/>
 </target>
 <target name = "clean" descrīption = "clean old class">
   <delete dir ="${classpath}"/>
 </target>
</project>