Custom exception of use

 Here is an example of a defined custom exception, developers can serve as a reference, write your own exception classes according to project requirements

Package com.thinkgem.wlw.modules.job.service; 

// custom exception the Exception class to inherit 
public  class MyException the extends Exception {
     / ** 
     * It should be a non-reference and a constructor argument constructor 
     * / 
    public MyException ( ) {}
     public MyException (String S) {
         Super (S); 
    } 

    / ** 
     * a class definition may throw exception process, this method can be written in a single class 
     after * define the method, others can It is performed using the 
     * @param FEN 
     * @return 
     * @throws MyException
      * / 
    public String deiFen ( int FEN)throws MyException {
         IF (FEN> = 0 && FEN <= 100 ) {
             return "normal" ; 
        } the else {
             // when throws a custom exception scores outside the range of 0 to 100 
            the throw  new new MyException ( "Error Input" ); 
        } 
    } 

    / ** 
     * test 
     * @param args
      * / 
    public  static  void main (String args []) {
         the try { 
            MyException m = new new MyException (); 
            System.out.println (m.deiFen ( 123 ));　　@ 123 is not within the range, abnormality occurs

        } The catch (Exception E) { 
            System.out.println ( "exception information is:" + e.getMessage ()); 
        } 
    } 
}

Test Results: