diff -urEbwB java3d-1.5.2/j3d-core/src/classes/build.xml java3d-1.5.2/j3d-core/src/classes/build.xml
--- java3d-1.5.2/j3d-core/src/classes/build.xml	2017-09-18 17:48:49.037551872 +0200
+++ java3d-1.5.2/j3d-core/src/classes/build.xml	2017-09-18 17:52:38.396619682 +0200
@@ -45,8 +45,6 @@
     <!-- Compile the java code from ${src} into ${build}/${platform}/debug/classes -->
     <javac srcdir="${src}/classes/share:${src}/classes/${wstype}:${jogl.pipeline.srcdir}:${core_utils_src}/classes/share:${build-debug-gen}/classes"
            destdir="${build}/${platform}/debug/classes"
-	   source="1.5"
-	   target="1.5"
 	   debug="true"
            deprecation="off"
            excludes="${javac.excludes}">
@@ -93,8 +91,6 @@
 
     <!-- Compile the java code from ${src} into ${build}/${platform}/opt/classes -->
    <javac srcdir="${src}/classes/share:${src}/classes/${wstype}:${jogl.pipeline.srcdir}:${core_utils_src}/classes/share:${build-opt-gen}/classes"            destdir="${build}/${platform}/opt/classes"
-           source="1.5"
-           target="1.5"
            debug="true"
            debuglevel="lines,source"
            deprecation="off"
diff -urEbwB java3d-1.5.2/vecmath/build.xml java3d-1.5.2/vecmath/build.xml
--- java3d-1.5.2/vecmath/build.xml	2017-09-18 17:48:49.017551872 +0200
+++ java3d-1.5.2/vecmath/build.xml	2017-09-18 17:50:12.860617197 +0200
@@ -77,8 +77,6 @@
     <!-- Compile the java code from ${src} into ${build}/debug/classes -->
     <javac srcdir="${src}"
            destdir="${build}/debug/classes"	   
-	   source="1.5"
-	   target="1.5"
 	   debug="true"
            deprecation="on"
     />
@@ -98,8 +96,6 @@
     <!-- Compile the java code from ${src} into ${build}/opt/classes -->
     <javac srcdir="${src}"
            destdir="${build}/opt/classes"	   
-	   source="1.5"
-	   target="1.5"
            debug="true"
            debuglevel="lines,source"
            deprecation="on"