diff -uprN weka.orig/build.xml weka/build.xml
--- weka.orig/build.xml	2004-11-14 17:25:34.451506656 +0100
+++ weka/build.xml	2004-11-14 17:27:31.085775552 +0100
@@ -45,7 +45,8 @@
   <target name="compile_inline" depends="init_all"
    description="Compile weka and leave class files in the source tree">
      <javac srcdir="${path_modifier}weka"
-      destdir="${path_modifier}"/>
+      destdir="${path_modifier}"
+      source="1.4" target="1.4" />
       <rmic base="${path_modifier}" 
        classname="weka.experiment.RemoteEngine"/>
   </target>
@@ -61,7 +62,8 @@
      <property name="build.compiler.emacs" value="true"/>
      <javac srcdir="${path_modifier}weka"
       destdir="${path_modifier}"
-      deprecation="on" />
+      deprecation="on" 
+      source="1.4" target="1.4" />
      <rmic base="${path_modifier}" 
       classname="weka.experiment.RemoteEngine"/>
   </target>
@@ -70,7 +72,8 @@
   <target name="compile" depends="init_compile" 
    description="Compile weka and deposit class files in ${path_modifier}/build/classes">
     <javac srcdir="${path_modifier}weka" 
-    destdir="${path_modifier}${build}/classes"/>
+    destdir="${path_modifier}${build}/classes" 
+    source="1.4" target="1.4" />
     <copy todir="${path_modifier}${build}/classes" >
        <fileset dir="${path_modifier}.">
           <include name="weka/**/*.props"/>
@@ -117,7 +120,8 @@
   <target name="compile_tests" depends="init_tests, compile" 
    description="Compile unit tests into ${path_modifier}/build/testcases">
      <javac srcdir="${path_modifier}tests" 
-      destdir="${path_modifier}${build}/testcases">
+      destdir="${path_modifier}${build}/testcases"
+      source="1.4" target="1.4" >
         <classpath>
 	   <pathelement location="${path_modifier}${build}/classes"/>
 	   <pathelement path="${path_modifier}${java.class.path}"/>
@@ -343,4 +347,4 @@
     <delete dir="${path_modifier}tests"/>
     <delete dir="${path_modifier}${doc}"/>
   </target>
-</project>
\ No newline at end of file
+</project>