diff --git a/playground/java/build.xml b/playground/java/build.xml
index dd40a21b9..7584b8fad 100644
--- a/playground/java/build.xml
+++ b/playground/java/build.xml
@@ -45,7 +45,8 @@
   <target name="compile" depends="init,resolve"
           description="compile the source">
     <!-- Compile the java code from ${src} into ${build} -->
-    <javac srcdir="${src}" destdir="${build}" classpathref="classpath" />
+    <javac srcdir="${src}" destdir="${build}" classpathref="classpath" 
+           debug="true" debuglevel="lines,vars,source" />
   </target>
 
   <target name="dist" depends="compile"