Java can be tricky, too :)

gistfile1.java

public class Main {
	
	public static class Hello {

		void fun() throws NullPointerException {
			
		}
	}

	public static class Hello2 extends Hello {
	
		@Override
		void fun() throws RuntimeException {
			throw new ArithmeticException();
		}
	}

	public static void main(String[] args) {
		Hello hello = new Hello2();
		try {
			hello.fun();
		} catch (NullPointerException e) {
			e.printStackTrace();
		}
	}

}