JAVA I have The operator is undefined for the argument type

(JAVA)

I have \'The operator - is undefined for the argument type(s) Integer, Integer\'.

Here is my code:

==================

import java.util.Comparator;

public class Integer implements Comparator<Integer> {

   @Override
   public int compare(Integer int1, Integer int2) {
       return int1 - int2;// error occurs in this line
   }
}

Solution

Hi Friend, Integer is your defined class. You need to define the meaning of (-) operator for your class.

Please see my one of the implementation.

Lets assume there is a instance variable, called \"value\" in your Integer class, then you can simpy implement

\'compare\' method like this.

Please let me know in case of any issue.

import java.util.Comparator;

public class Integer implements Comparator<Integer> {

   // instance variable

   private int value;

   // others instance variables and methods

   ///

   @Override

   public int compare(Integer int1, Integer int2) {

       return int1.value - int2.value;// error occurs in this line

   }

}