Java.util.BitSet.flip() Method

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Description

The java.util.BitSet.flip(int fromIndex,int toIndex) method sets each bit from the specified fromIndex (inclusive) to the specified toIndex (exclusive) to the complement of its current value.

Declaration

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

public void flip(int fromIndex,int toIndex)

Parameters

  • fromIndex -- index of the first bit to flip.

  • toIndex -- index after the last bit to flip.

Return Value

This method does not return a value.

Exception

  • IndexOutOfBoundsException -- if fromIndex is negative, or toIndex is negative, or fromIndex is larger than toIndex.

Example

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

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);

      // flip from index 2 to index 5 of bitset1 and print it
      bitset1.flip(2,5);
      System.out.println("" + bitset1);
      
      // flip from index 1 to index 5 of bitset2 and print it
      bitset2.flip(1,5);
      System.out.println("" + bitset2);

   }
}

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}
{0, 1, 5}
{1, 3, 6, 8, 10}



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