class ChildException extends Exception {
    ChildException(){
    }
    ChildException(String name){
      super(name);
    }
  }
  
  class Demo throws ChildException {
    void func(){
      throw new ChildException();
    }
  }
  
  class RunDemo {
    public static void main(String[] args){
      Demo d = new Demo();
      
      try{
        d.func();
      } catch(ChildException e){
        e.getMessage();
      } catch(Exception oe){
        System.out.println("other exception");
      }
      
    }
  }