Xcode: 'Generics are not supported in -source 1.3' compiler error?

dictionary = new ArrayList<String>();

<target name="compile" depends="init" description="Compile code">
	<mkdir dir="${bin}"/>
	<javac deprecation="on" srcdir="${src}" destdir="${bin}"
		   source="1.3" target="1.2"

/Developer/Library/XCode/Project Templates/Java/Java Tool/build.xml