This is a conceptual question.

Assume there are two user threads U1 and U2 that
a program spawns. Thread U1 throws an exception
which is not handled by the thread/program.
Which of the following is true -

  a) U1 terminates and U2 continues to run.
  b) U1 and U2 both terminate.
  c) (b) and the JVM terminates too.

As I understand, uncaught exceptions
are handled by ThreadGroup.uncaughtException() which
terminates the program. But I am not very clear
how it affects the other threads that may
or may not be in the same thread group.

I really appreciate your inputs.

class Question {
	public static void main(String[] args) {
		System.out.println("Starting User therad 1....");
		Thread t1 = new MyThread1();
		t1.start();
		System.out.println("Starting User therad 2....");
		Thread t2 = new MyThread2();
		t2.start();
		System.out.println("Last statement of Main(..) method");
	}
}
class MyThread1 extends Thread {
	 public void run() {
		for(int i=0; i<100; i++) {
			try {
				sleep(1000);
			}catch(InterruptedException e){}
			System.out.println(getName());
		}
	}
}
class MyThread2 extends Thread {
	 public void run() {
		for(int i=0; i<100; i++) {
			try {
				sleep(1000);
			}catch(InterruptedException e){}
			if(i==3)
				throw new RuntimeException();
			System.out.println(getName());
		}
	}
}