Java.util.BitSet.isEmpty() Method


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Description

The java.util.BitSet.isEmpty() method returns true if this BitSet contains no bits that are set to true.

Declaration

Following is the declaration for java.util.BitSet.isEmpty() method

public boolean isEmpty()

Parameters

NA

Return Value

This method returns boolean indicating whether this BitSet is empty.

Exception

NA

Example

The following example shows the usage of java.util.BitSet.isEmpty() method.

Live Demo
package com.tutorialspoint;

import java.util.*;

public class BitSetDemo {
   public static void main(String[] args) {

      // create 2 bitsets
      BitSet bitset1 = new BitSet(8);
      BitSet bitset2 = new BitSet(8);

      // assign values to bitset1
      bitset1.set(0);
      bitset1.set(1);
      bitset1.set(2);
      bitset1.set(3);
      bitset1.set(4);
      bitset1.set(5);

      // assign values to bitset2
      bitset2.set(2);
      bitset2.set(4);
      bitset2.set(6);
      bitset2.set(8);
      bitset2.set(10);

      // print the sets
      System.out.println("Bitset1:" + bitset1);
      System.out.println("Bitset2:" + bitset2);

      // check if bitset1 and 2 are empty
      System.out.println("" + bitset1.isEmpty());
      System.out.println("" + bitset2.isEmpty());

      // create a new empty bitset
      BitSet bitset3 = new BitSet(8);

      // check if bitset3 is empty
      System.out.println("" + bitset3.isEmpty());
   }
}

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

Bitset1:{0, 1, 2, 3, 4, 5}
Bitset2:{2, 4, 6, 8, 10}
false
false
true

java_util_bitset.htm

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