Java - Integer equals() method



Description

The Java Integer equals() method compares this object to the specified object. The result is true if and only if the argument is not null and is an Integer object that contains the same int value as this object.

Declaration

Following is the declaration for java.lang.Integer.equals() method

public boolean equals(Object obj)

Parameters

obj − This is the object to compare with.

Return Value

This method true if the objects are the same, else false.

Exception

NA

Example 1

The following example shows the usage of Integer equals() method to compare two Integer objects. We've created two Integer objects with different integer values. Then using equals() method, we're checking and printing the result of objects being equal or not.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {
      Integer obj1 = new Integer(32);
      Integer obj2 = new Integer(75);
      System.out.print("Is obj1 and obj2 equal ? ");
      System.out.println(obj1.equals(obj2));
   }
} 

Output

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

Is obj1 and obj2 equal ? false

Example 2

The following example shows the usage of Integer equals() method to compare two Integer objects. We've created two Integer objects with same integer value. Then using equals() method, we're checking and printing the result of objects being equal or not.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {
      Integer obj1 = new Integer(32);
      Integer obj2 = new Integer(32);
      System.out.print("Is obj1 and obj2 equal ? ");
      System.out.println(obj1.equals(obj2));
   }
} 

Output

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

Is obj1 and obj2 equal ? true

Example 3

The following example shows the usage of Integer equals() method to compare two Integer objects. We've created two Integer objects with same string of integer value. Then using equals() method, we're checking and printing the result of objects being equal or not.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {
      Integer obj1 = new Integer("32");
      Integer obj2 = new Integer("32");
      System.out.print("Is obj1 and obj2 equal ? ");
      System.out.println(obj1.equals(obj2));
   }
} 

Output

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

Is obj1 and obj2 equal ? true

Example 4

The following example shows the usage of Integer equals() method to compare two Integer objects. We've created two Integer objects with different string of integer value. Then using equals() method, we're checking and printing the result of objects being equal or not.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {
      Integer obj1 = new Integer("32");
      Integer obj2 = new Integer("75");
      System.out.print("Is obj1 and obj2 equal ? ");
      System.out.println(obj1.equals(obj2));
   }
} 

Output

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

Is obj1 and obj2 equal ? false
java_lang_integer.htm
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