class Problem extends Exception{
  Problem(){super();}
  Problem(String s) {super(s);}
}

public class CatchOrSpecifyDemo0 {

  static void eksplosion() throws Problem {
    System.out.println("Eksplosion!");
    throw new Problem("Vi har et eksplosivt problem");
  }

  public static void main(String[] args){
      eksplosion();
  }
}