static boolean isJavaCompilable(String text) ctex {
  Class javax = getJavaX();
  File srcDir = (File) call(javax, "TempDirMaker_make");
  saveTextFile(new File(srcDir, "main.java").getPath(), text);
  File classesDir = (File) call(javax, "TempDirMaker_make");
  new List<File> libraries;

  try {
    call(javax, "compileJava", srcDir, libraries, classesDir);
    return true;
  } catch (Exception e) {
    return false;
  }
}