Java Integer compareTo() method with Examples

by Online Tutorials Library July 22, 2022

Java Integer compareTo() method

The compareTo() method is a method of Integer class under java.lang package. This method compares two integer objects numerically. It returns the result of the value 0 if Integer is equal to the argument Integer, a value less than 0 if Integer is less than the argument Integer and a value greater than 0 if Integer is greater than the argument Integer. This method is specified by Comparable<Integer>Interface.

Note: This method cannot be compared two different types of argument, so both the argument and the number should be the same type.

Syntax

Following is the declaration of compare() method:

Parameter:

DataType	Parameter	Description	Required/Optional
int	anotherInteger	The Integer value to be compare	Required

Returns:

This method will returns the following values:

  0 = The value 0 if this Integer = the argument Integer,  -1 = The value less than 0 if thisInteger < the argument Integer, and   1 = The value greater than 0 if this Integer > the argument Integer  

Exceptions:

Compatibility Version:

Java 1.2 and above

Example 1

  public class IntegerCompareToExample1 {  public static void main(String[] args) {    Integer num1 = new Integer(10);          Integer num2 = new Integer(20);          Integer num3 = new Integer(10);          Integer num4 = new Integer(30);          // as num1 num2, Output will be a value greater than zero          System.out.println(num4.compareTo(num2));  }  }  ,>

Test it Now

Output:

-1  0  1

Example 2

  public class IntegerCompareToExample2 {  public static void main(String[] args) {  // compares two Integer values numerically        Integer x = new Integer(“90”);        Integer y= new Integer(“58”);        int retResult =  x.compareTo(y);            if(retResult > 0) {           System.out.println(“x is greater than y”);        } else if(retResult< 0) {           System.out.println(“x is less than y”);        } else {           System.out.println(“x is equal to y”);        }  }  }  

Test it Now

Output:

x is greater than y

Example 3

  public class IntegerCompareToExample3 {  public static void main(String[] args) {  Integer value = new Integer(222);  // check if the value is less than 222  System.out.println(value.compareTo(155));  // check if value is equal to 222  System.out.println(value.compareTo(222));  // check if value is greater than 222  System.out.println(value.compareTo(305));  }  }  

Test it Now

Output:

1  0  -1

Example 4

  import java.util.Scanner;  public class IntegerCompareToExample4 {  public static void main(String[] args) {  Scanner sc = new Scanner(System.in);              System.out.print(“Enter the integer value to be campare with another Integer: “);  Integer value = sc.nextInt();  sc.close();  System.out.println(value.compareTo(305));  System.out.println(value.compareTo(200));  System.out.println(value.compareTo(155));  }  }  

Output:

Enter the integer value to be campare with another Integer: 200  -1  0  1

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Java Integer compareTo() method with Examples

Java Integer compareTo() method

Note: This method cannot be compared two different types of argument, so both the argument and the number should be the same type.

Syntax

Parameter:

Returns:

Exceptions:

Compatibility Version:

Example 1

Example 2

Example 3

Example 4

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