Three cheers (or more) for Java 9 release!

Java9AtLast.java

// Compile and run in Java 9.  Then compile and run in Java 8 and 9.  Enjoy your new JDK :-D
public class Java9AtLast {
  public static void hiphip(int cheers) {
    try {
      hiphip(cheers + 1);
    } catch(StackOverflowError er) {
      System.out.println("hooray x " + cheers);
    }
  }
  public static void main(String... args) {
    hiphip(0);
  }
}

For java 8 the output is not what I've expected... It is able to catch an error (thanks for the learning experience 👍 )!
For java 9 you'd better don't try to catch the error (it becomes some cryptic):

Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class java.lang.invoke.MethodType
	at java.base/java.lang.invoke.MethodHandleNatives.findMethodHandleType(MethodHandleNatives.java:292)
	at Java9AtLast.hiphip(Java9AtLast.java:6)

When removing the try-catch, it is more comprehensible:

Exception in thread "main" java.lang.StackOverflowError
	at Java9AtLast.hiphip(Java9AtLast.java:5)

You can produce some marvelous hacks with StackOverflowError - for example, make threads die without releasing their locks ... :-)

Fortunately synchronized is fairly robust in this way ...