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Java BitSet clear() Method

The Java BitSet clear() method sets all of the bits in this BitSet to false.

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

public void clear()

NA

This method does not return a value.

NA

The Java BitSet clear(int bitIndex) method sets the bit specified by the index to false.

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

public void clear(int bitIndex)

bitIndex − the index of the bit to be cleared.

This method does not return a value.

IndexOutOfBoundsException − if the specified index is negative.

The Java BitSet clear(int fromIndex,int toIndex) method sets the bits from the specified fromIndex (inclusive) to the specified toIndex (exclusive) to false.

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

public void clear(int fromIndex,int toIndex)

• fromIndex − index of the first bit to be cleared

• toIndex − index of the last bit to be cleared

This method does not return a value.

IndexOutOfBoundsException − if fromIndex is negative, or toIndex is negative, or fromIndex is larger than toIndex.

The following example shows the usage of Java BitSet clear() method. We're creating a BitSet. We're setting true values in the BitSet object using set() method call and using clear() method we're resetting all bits to be false and printing the bitset cardinality.

package com.tutorialspoint;

import java.util.BitSet;

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

      // create a bitset
      BitSet bitset = new BitSet();

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

      // print the set
      System.out.println("Bitset:" + bitset);

      // clear the bitset
      bitset.clear();

      // print cardinality for bitset, it should be zero
      System.out.println(bitset.cardinality());
   }
}

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

Bitset:{0, 1, 2, 3, 4, 5}
0

The following example shows the usage of Java BitSet clear(index) method. We're creating a BitSet. We're setting true values in the BitSet object using set() method call and using clear(index) method we're resetting one of the bits to be false and printing the bitset.

package com.tutorialspoint;

import java.util.BitSet;

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

      // create a bitset
      BitSet bitset = new BitSet();

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

      // print the set
      System.out.println("Bitset:" + bitset);

      // clear the bitset value at index 3
      bitset.clear(3);

      // print the bitset
      System.out.println("Bitset:" + bitset);
   }
}

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

Bitset:{0, 1, 2, 3, 4, 5}
Bitset:{0, 1, 2, 4, 5}

The following example shows the usage of Java BitSet clear(fromIndex, toIndex) method. We're creating a BitSet. We're setting true values in the BitSet object using set() method call and using clear(fromIndex, toIndex) method we're resetting few of the bits to be false and printing the bitset.

package com.tutorialspoint;

import java.util.BitSet;

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

      // create a bitset
      BitSet bitset = new BitSet();

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

      // print the set
      System.out.println("Bitset:" + bitset);

      // clear the bitset value from index 3(inclusive) to 5(exclusive)
      bitset.clear(3, 5);

      // print the bitset
      System.out.println("Bitset:" + bitset);
   }
}

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

Bitset:{0, 1, 2, 3, 4, 5}
Bitset:{0, 1, 2, 5}

java_util_bitset.htm

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