How to create user defined exceptions

You can create user defined exception by simply extending the Exception class.

Example

class MyException extends Exception{
 MyException(String msg){
  super(msg);
 }
}

    

class MyExceptionTest{
 static void print(int val)throws Exception{
  if(val < 0 ){
   throw new MyException("Values is less than zero:" + val);
  }
  else{
   System.out.println(val);
  }
 }

 public static void main(String args[]){
  try{
   print(-10);
  }
  catch(Exception e){
   System.out.println(e);
  }
 }
}

   

Output

MyException: Values is less than zero:-10

  

In the same way we can create RuntimeExceptions by extending the RuntimeException class.

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