diff -Naur old/source/build.xml new/source/build.xml

--- old/source/build.xml	2022-03-28 17:29:56.000000000 -0400

+++ new/source/build.xml	2022-05-30 09:01:12.038023625 -0400

@@ -14,7 +14,7 @@

     <!-- First, ensure the build directory exists. -->

     <mkdir dir="${build.dir}" />

     <!-- Build everything; add debug="on" to debug -->

-    <javac srcdir="./ij" destdir="${build.dir}" optimize="on" source="1.6" target="1.6" debug="on" includeantruntime="false" encoding="utf-8">

+    <javac srcdir="./ij" destdir="${build.dir}" optimize="on" source="1.8" target="1.8" debug="on" includeantruntime="false" encoding="utf-8">

     </javac>

   </target>