Try using -verbose:class to find which class fails to load. Use -d on ant to find problems during ant build. Try using JDK 7 to do compile for 1.7 target, instead of using JDK 8.
On Tue, Dec 20, 2016 at 1:55 PM, Jan Tosovsky <[email protected]> wrote: > Dear All, > > I am trying to modify build.xml config to produce bytecode compatible with > JDK 1.7. > > So far I tried: > > (1) compile on JDK 8 with modifying all <javac> tasks to <javac > target="1.7" > ...> > (2) compile on JDK 8 with global param <property > name="ant.build.javac.target" value="1.7" /> > (3) same as above with older Ant version to avoid possible issue: > https://bz.apache.org/bugzilla/show_bug.cgi?id=59683 > (4) compile on JDK 7u80 > > Nothing helped. Especially the last item is very suspicious. Both JAVA_HOME > and PATH variable points to JDK7, but when testign the produced jars, I am > getting the same error message: > > "jdk1.7.0_80\bin\java" -Xmx2G -jar batik-rasterizer-svn-trunk.jar -m > image/png -w 200 -h 200 horologium.svg > Exception in thread "main" java.lang.UnsupportedClassVersionError: > org/apache/batik/apps/rasterizer/Main : Unsupported major.minor version > 52.0 > at java.lang.ClassLoader.defineClass1(Native Method) > at java.lang.ClassLoader.defineClass(ClassLoader.java:800) > at > java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) > at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) > at java.net.URLClassLoader.access$100(URLClassLoader.java:71) > at java.net.URLClassLoader$1.run(URLClassLoader.java:361) > at java.net.URLClassLoader$1.run(URLClassLoader.java:355) > at java.security.AccessController.doPrivileged(Native Method) > at java.net.URLClassLoader.findClass(URLClassLoader.java:354) > at java.lang.ClassLoader.loadClass(ClassLoader.java:425) > at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308) > at java.lang.ClassLoader.loadClass(ClassLoader.java:358) > at > sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482) > > Is it possible Ant could somehow bypass my JDK settings and use another JDK > version? > > I am stuck now. Windows 10 64-bit + Oracle JDK 7/8. > > Thanks, > > Jan > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > >
