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

public class CatchOrSpecifyDemo2 {

  public static void main(String[] args) throws Problem  {   
      explosion();
  }

  static void explosion() throws Problem{                    
    System.out.println("Explosion!");
    throw new Problem("We have an explosive problem");
  }

}