The equals() method of Java BitSet class is used to check for equality between two bitsets. It verifies whether the elements of one set passed as a parameter is equal to the elements of this set or not. The method returns true if the bitsets match else false.
Syntax:
Bit_Set1.equals(Bit_Set2)
Parameters: The method accepts one parameter Bit_Set2 of bitset type and refers to the set whose equality is to be checked with this bit set.
Return Value: The method returns true if the equality holds for both the object set else it returns false.
Below programs illustrate the working of BitSet equals() method in Java.
Program 1:
// Java code to illustrate equals()import java.util.*;  public class BitSet_Demo {    public static void main(String args[])    {        // Creating an empty BitSet        BitSet bit_set1 = new BitSet();        BitSet bit_set2 = new BitSet();          // Use set() method to add elements into the Set        bit_set1.set(40);        bit_set1.set(25);        bit_set1.set(80);        bit_set1.set(95);        bit_set1.set(5);          // Use set() method to add elements into the Set        bit_set2.set(25);        bit_set2.set(40);        bit_set2.set(5);        bit_set2.set(95);        bit_set2.set(80);          // Displaying the BitSets        System.out.println("First BitSet: " + bit_set1);        System.out.println("Second BitSet: " + bit_set2);          // Checking for equality        System.out.println("Are the sets equal? "                           + bit_set1.equals(bit_set2));    }} |
Output:
First BitSet: {5, 25, 40, 80, 95}
Second BitSet: {5, 25, 40, 80, 95}
Are the sets equal? true
Program 2:
// Java code to illustrate equals()import java.util.*;  public class BitSet_Demo {    public static void main(String args[])    {        // Creating an empty BitSet        BitSet bit_set1 = new BitSet();        BitSet bit_set2 = new BitSet();          // Use set() method to add elements into the Set        bit_set1.set(40);        bit_set1.set(25);        bit_set1.set(80);        bit_set1.set(95);        bit_set1.set(5);          // Use set() method to add elements into the Set        bit_set2.set(10);        bit_set2.set(20);        bit_set2.set(30);        bit_set2.set(40);        bit_set2.set(50);          // Displaying the BitSets        System.out.println("First BitSet: " + bit_set1);        System.out.println("Second BitSet: " + bit_set2);          // Checking for equality        System.out.println("Are the sets equal? "                           + bit_set1.equals(bit_set2));    }} |
Output:
First BitSet: {5, 25, 40, 80, 95}
Second BitSet: {10, 20, 30, 40, 50}
Are the sets equal? false
