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BigInteger equals() Method in Java

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  • Last Updated : 04 Dec, 2018
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The java.math.BigInteger.equals(Object x) method compares this BigInteger with the object passed as the parameter and returns true in both are equal in value else it returns false.

Syntax:

public boolean equals(Object x)

Parameter: This method accepts a single mandatory parameter x which is the Object to which BigInteger Object is to be compared.

Returns: This method returns boolean true if and only if the Object passed as parameter is a BigInteger whose value is equal to the BigInteger Object on which the method is applied. Otherwise it will return false.

Examples:

Input: BigInteger1=2345, BigInteger2=7456
Output: false
Explanation: BigInteger1.equals(BigInteger2)=false.

Input: BigInteger1=7356, BigInteger2=7456
Output: true
Explanation: BigInteger1.equals(BigInteger2)=true.

Below programs illustrate equals() method of BigInteger class:

Example 1: When both are equal in value.




// Java program to demonstrate equals() method of BigInteger
  
import java.math.BigInteger;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Creating 2 BigInteger objects
        BigInteger b1, b2;
  
        b1 = new BigInteger("321456");
        b2 = new BigInteger("321456");
  
        // apply equals() method
        boolean response = b1.equals(b2);
  
        // print result
        if (response) {
  
            System.out.println("BigInteger1 " + b1
                               + " and BigInteger2 "
                               + b2 + " are equal");
        }
        else {
  
            System.out.println("BigInteger1 " + b1
                               + " and BigInteger2 "
                               + b2 + " are not equal");
        }
    }
}

Output:

BigInteger1 321456 and BigInteger2 321456 are equal

Example 2: When both are not equal in value.




// Java program to demonstrate equals() method of BigInteger
  
import java.math.BigInteger;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Creating 2 BigInteger objects
        BigInteger b1, b2;
  
        b1 = new BigInteger("321456");
        b2 = new BigInteger("456782");
  
        // apply equals() method
        boolean response = b1.equals(b2);
  
        // print result
        if (response) {
  
            System.out.println("BigInteger1 " + b1
                               + " and BigInteger2 "
                               + b2 + " are equal");
        }
        else {
  
            System.out.println("BigInteger1 " + b1
                               + " and BigInteger2 " + b2 + " are not equal");
        }
    }
}

Output:

BigInteger1 321456 and BigInteger2 456782 are not equal

Example 3: When object passed as parameter is other than BigInteger.




// Java program to demonstrate equals() method of BigInteger
  
import java.math.BigInteger;
  
public class Main6 {
  
    public static void main(String[] args)
    {
  
        // Creating  BigInteger object
        BigInteger b1;
  
        b1 = new BigInteger("321456");
        String object = "321456";
  
        // apply equals() method
        boolean response = b1.equals(object);
  
        // print result
        if (response) {
  
            System.out.println("BigInteger1 " + b1
                               + " and String Object "
                               + object + " are equal");
        }
        else {
  
            System.out.println("BigInteger1 " + b1
                               + " and String Object "
                               + object + " are not equal");
        }
    }
}

Output:

BigInteger1 321456 and String Object 321456 are not equal

Reference: https://docs.oracle.com/javase/7/docs/api/java/math/BigInteger.html#equals(java.lang.Object)


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