The compareTo() method of Integer class of java.lang package compares two Integer objects numerically and returns the value 0 if this Integer is equal to the argument Integer; a value less than 0 if this Integer is numerically less than the argument Integer; and a value greater than 0 if this Integer is numerically greater than the argument Integer (signed comparison).
Syntax :
public int compareTo(Integer anotherInt) Parameter : anotherInt- : the Integer to be compared. Return : - This method returns the value 0 if this Integer is equal to the argument Integer; - a value less than 0 if this Integer is numerically less than the argument Integer; - and a value greater than 0 if this Integer is numerically greater than the argument Integer (signed comparison).
Example 01 : To show working of java.lang.Integer.compareTo() method.
java
// Java program to demonstrate working// of java.lang.Integer.compareTo() methodimport java.lang.Integer;class Gfg { // driver code public static void main(String args[]) { Integer a = new Integer(10); Integer b = new Integer(20); // as 10 less than 20, Output will be a value less than zero System.out.println(a.compareTo(b)); Integer x = new Integer(30); Integer y = new Integer(30); // as 30 equals 30, Output will be zero System.out.println(x.compareTo(y)); Integer w = new Integer(15); Integer z = new Integer(8); // as 15 is greater than 8, Output will be a value greater than zero System.out.println(w.compareTo(z)); }} |
Output:
-1 0 1
Example 02 :The working of compareTo() method in Java to compare two integer values.
Java
import java.io.*;class GFG { public static void main(String[] args) { Integer num1 = 10; Integer num2 = 5; Integer num3 = 10; int result1 = num1.compareTo(num2); int result2 = num1.compareTo(num3); int result3 = num2.compareTo(num3); System.out.println("Comparing num1 and num2: " + result1); System.out.println("Comparing num1 and num3: " + result2); System.out.println("Comparing num2 and num3: " + result3); }} |
Output :
Comparing num1 and num2: 1 Comparing num1 and num3: 0 Comparing num2 and num3: -1