JavacFileManager fm = null;
try {
fm = new JavacFileManager(new Context(), false, null);
Set<JavaFileObject.Kind> set = new HashSet<JavaFileObject.Kind>();
set.add(JavaFileObject.Kind.CLASS);
Iterable<JavaFileObject> files = fm.list(StandardLocation.PLATFORM_CLASS_PATH, "java.lang", set, false);
for (JavaFileObject file : files) {
// Note: Zip/Jar entry names use '/', not File.separator, but just to be sure,
// we normalize the filename as well.
if (file.getName().replace(File.separatorChar, '/').contains("java/lang/Object.class")) {
String str = fm.inferBinaryName(StandardLocation.CLASS_PATH, file);