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The compareTo method is to use compare one number against another. This is useful if you want to compare the value of numbers.

Syntax

public int compareTo( NumberSubClass referenceName ) 

Parameters

referenceName – This could be a Byte, Double, Integer, Float, Long or Short.

Return Value

• If the Integer is equal to the argument then 0 is returned.
• If the Integer is less than the argument then -1 is returned.
• If the Integer is greater than the argument then 1 is returned.

Example

Following is an example of the usage of this method −

class Example { 
   static void main(String[] args) { 
      Integer x = 5;
		
      //Comparison against a Integer of lower value 
      System.out.println(x.compareTo(3));
		
      //Comparison against a Integer of equal value 
      System.out.println(x.compareTo(5)); 
		
      //Comparison against a Integer of higher value 
      System.out.println(x.compareTo(8)); 
   } 
} 

When we run the above program, we will get the following result −

1 
0 
-1 

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