Java - Long compareTo() method

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Description

The Java Long compareTo() method compares two Long objects numerically.

Declaration

Following is the declaration for java.lang.Long.compareTo() method

public int compareTo(Long anotherLong)

Parameters

anotherLong − This is the Long to be compared.

Return Value

This method returns the value 0 if this Long is equal to the argument Long, a value less than 0 if this Long is numerically less than the argument Long and a value greater than 0 if this Long is numerically greater than the argument Long.

Exception

NA

Example 1

The following example shows the usage of Long compareTo() method to compare two Long objects. We've created two Long variables and assigned them Long objects created using a positive long values. Then using compareTo() method, we're comparing the Long objects.

package com.tutorialspoint;
public class LongDemo {
   public static void main(String[] args) {
      // compares two Long objects numerically
      Long obj1 = new Long("25");
      Long obj2 = new Long("10");
      int retval =  obj1.compareTo(obj2);
    
      if(retval > 0) {
         System.out.println("obj1 is greater than obj2");
      } else if(retval < 0) {
         System.out.println("obj1 is less than obj2");
      } else {
         System.out.println("obj1 is equal to obj2");
      }
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

obj1 is greater than obj2

Example 2

The following example shows the usage of Long compareTo() method to compare two Long objects. We've created two Long variables and assigned them Long objects created using a negative long values. Then using compareTo() method, we're comparing the Long objects.

package com.tutorialspoint;
public class LongDemo {
   public static void main(String[] args) {

      // compares two Long objects numerically
      Long obj1 = new Long("-25");
      Long obj2 = new Long("-10");
      int retval =  obj1.compareTo(obj2);
    
      if(retval > 0) {
         System.out.println("obj1 is greater than obj2");
      } else if(retval < 0) {
         System.out.println("obj1 is less than obj2");
      } else {
         System.out.println("obj1 is equal to obj2");
      }
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

obj1 is less than obj2

Example 3

The following example shows the usage of Long compareTo() method to compare two Long objects. We've created two Long variables and assigned them Long objects created using a same positive long values. Then using compareTo() method, we're comparing the Long objects.

package com.tutorialspoint;
public class LongDemo {
   public static void main(String[] args) {

      // compares two Long objects numerically
      Long obj1 = new Long("25");
      Long obj2 = new Long("25");
      int retval =  obj1.compareTo(obj2);
    
      if(retval > 0) {
         System.out.println("obj1 is greater than obj2");
      } else if(retval < 0) {
         System.out.println("obj1 is less than obj2");
      } else {
         System.out.println("obj1 is equal to obj2");
      }
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

obj1 is equal to obj2