Java BitSet intersects() Method

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Description

The Java BitSet intersects(BitSet set) method returns true if the specified BitSet has any bits set to true that are also set to true in this BitSet.

Declaration

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

public boolean intersects(BitSet set)

Parameters

set − BitSet to intersect with

Return Value

This method returns boolean indicating whether this BitSet intersects the specified BitSet.

Exception

NA

Checking Intersection of Two BitSets Example

The following example shows the usage of Java BitSet intersects() method. We're creating two BitSets. We're setting true values at given indexes to the BitSet objects using set() method calls per index and using intersects() method we're performing intersects opearation and printing the result.

package com.tutorialspoint;

import java.util.BitSet;

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

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

      // assign values to bitset1
      bitset1.set(0, 6, true);

      // 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);

      // print if bitset1 intersects with bitset2
      System.out.println(bitset1.intersects(bitset2));
   }
}

Output

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}
true

Checking Intersection of Two BitSets of Bytes Example

The following example shows the usage of Java BitSet intersects() method. We're creating two BitSets using byte[] and using intersects() method we're performing intersects opearation and printing the result.

package com.tutorialspoint;

import java.util.BitSet;

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

      // create 2 bitsets
      BitSet bitset1 = BitSet.valueOf(new byte[] { 0, 1, 2, 3, 4, 5 });
      BitSet bitset2 = BitSet.valueOf(new byte[] { 2, 4, 6, 8, 10 });

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

      // perform and operation between two bitsets
      bitset1.and(bitset2);

      // print if bitset1 intersects with bitset2
      System.out.println(bitset1.intersects(bitset2));
   }
}

Output

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

Bitset1:{8, 17, 24, 25, 34, 40, 42}
Bitset2:{1, 10, 17, 18, 27, 33, 35}
true

Checking Intersection of Two BitSets of Longs Example

The following example shows the usage of Java BitSet intersects() method. We're creating two BitSets using long[] and using intersects() method we're performing intersects opearation and printing the result.

package com.tutorialspoint;

import java.util.BitSet;

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

      // create 2 bitsets
      BitSet bitset1 = BitSet.valueOf(new long[] { 0, 1, 2, 3, 4, 5 });
      BitSet bitset2 = BitSet.valueOf(new long[] { 2, 4, 6, 8, 10 });

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

      // print if bitset1 intersects with bitset2
      System.out.println(bitset1.intersects(bitset2));
   }
}

Output

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

Bitset1:{64, 129, 192, 193, 258, 320, 322}
Bitset2:{1, 66, 129, 130, 195, 257, 259}
true