class MyException extends Exception {                // define my own type of Exception
  public MyException(String s) {                     // can just use Exception itself for simple cases
    super(s);                                        // but need own definitions for bigger subsystems
  }
}

public class Except {
  public static void main(String args[]) {
    try {
      function4();                                   // no cascading ifs, nice-and-clean
      function5();                                   // function calls are just inline as if everything is OK
      function6();
    } catch (MyException e) {                        // if an Exception is thrown, it will be caught here
       System.out.println(e.getMessage());           // note the declaration of the variable: MyException e
    }                                                // Exceptions store error Strings which are accessed
  }                                                  // via getMessage()

  private static void function4() throws MyException { // must declare any possible Exception it might throw
  }

  private static void function5() throws MyException {
  }

  private static void function6() throws MyException {
    throw new MyException("error: 49");                // here's an actual error situation, note the String
  }                                                    // this will be caught in the main
}