public boolean isEmpty()

// Java program illustrating Bitset
// isEmpty() function.
 
import java.util.*;
public class GFG {
    public static void main(String[] args)
    {
        // Constructors of BitSet class
        BitSet bs1 = new BitSet();
        BitSet bs2 = new BitSet();
        BitSet bs3 = new BitSet();
 
        /* set is BitSet class method
        explained in next articles */
        bs1.set(0);
        bs1.set(1);
        bs1.set(2);
        bs1.set(4);
 
        // assign values to bs2
        bs2.set(4);
        bs2.set(6);
        bs2.set(5);
        bs2.set(1);
        bs2.set(2);
        bs2.set(3);
 
        // Printing the 2 Bitsets
        System.out.println("bs1 : " + bs1);
        System.out.println("bs2 : " + bs2);
        System.out.println("bs3 : " + bs3);
 
        // Performing isEmpty on bitsets
        System.out.println("Is bs1 empty : "
                           + bs1.isEmpty());
        System.out.println("Is bs2 empty : "
                           + bs2.isEmpty());
        System.out.println("Is bs3 empty : "
                           + bs3.isEmpty());
    }
}

bs1 : {0, 1, 2, 4}
bs2 : {1, 2, 3, 4, 5, 6}
bs3 : {}
Is bs1 empty : false
Is bs2 empty : false
Is bs3 empty : true