public static void javaXXeveryone(String version) throws CoreException {
   // 1: The eclipse workspace default VM should be Java 7
   IVMInstall vm = ensureJavaXXdefaultVM(version);
   // 2: Compiler/source compliance for JDT
   JavaUtils.setJavaXXCompliance(version); // Compiler/source compliance also Java 7
   // 3: Force Gradle JVM default
   GradleCore.getInstance().getPreferences().setJavaHomeJREName(vm.getName());
 }
 public static void setJava7Compliance() {
   setJavaXXCompliance("1.7");
 }
 public static void setJava16Compliance() {
   setJavaXXCompliance("1.6");
 }
 public static void setJava15Compliance() {
   setJavaXXCompliance("1.5");
 }