TestyDigitalMode created by max_l - https://repl.it/@max_l/TestyDigitalMode

TestyDigitalMode.java

class EndOfTheWorldException extends Exception {
  
  public EndOfTheWorldException(String reason) {
    super("The world has ended, because of "+ reason);
  }
}


class Main {
  
  public static void main(String[] args) {
    System.out.println("Hello world!");
  }

/*  
 this method does not compile, because it throws a checked exception that is neither 
declared (throws clause) or caught, if uncommented, the compiler will output this error :
  
Main.java:20: error: unreported exception EndOfTheWorldException; must be caught or declared to be thrown
      throw new EndOfTheWorldException("it happened !");
      ^
1 error

/  public static void dangerousMethod1() {
//      throw new EndOfTheWorldException("it happened !");
//  }  
*/


  // this method correctly declares the throwing of EndOfTheWorldException in it's signature : 
  public static void dangerousMethod2() throws EndOfTheWorldException {
      throw new EndOfTheWorldException("it happened !");
  }
  
  public static void dangerousMethodThatCanRecoverFromDisasters() {
    
    try {
      throw new EndOfTheWorldException("yes... it happened !");
    }
    catch(EndOfTheWorldException e) {
      // recover from end of the world...
    }
  }  
}