Java.util.BitSet.clear() in Java Last Updated : 16 Aug, 2018 Improve Improve Like Article Like Save Share Report There are three variants of clear() method: clear() : The clear() method sets all of the bits in this BitSet to false. public void clear() Return Value This method does not return a value. // Java code to demonstrate the working // of clear() in BitSet import java.util.*; public class BitClr1 { public static void main(String[] args) { // Declaring Bitset BitSet bset = new BitSet(8); // assigning values to bitset for (int i = 0; i < 5; i++) bset.set(i); // printing original bitset System.out.println ("The bitset before clear() operation is : " + bset); // using clear() to clear contents of bitset bset.clear(); // printing bitset after clear() operation // empty bitset System.out.println ("The bitset after clear() operation is : " + bset); } } Output: The bitset before clear() operation is : {0, 1, 2, 3, 4} The bitset after clear() operation is : {} clear(int pos) : The clear(int pos) method sets the bit specified by the index to false. i.e removes from bitset. public void clear(int pos) Parameters pos : the index of the bit to be cleared. Return Value This method does not return a value. Exception IndexOutOfBoundsException : if the specified index is negative. // Java code to demonstrate the working // of clear(int pos) in BitSet import java.util.*; public class BitClr2 { public static void main(String[] args) { // Declaring Bitset BitSet bset = new BitSet(8); // assigning values to bitset for (int i = 0; i < 5; i++) bset.set(i); // printing original bitset System.out.println ("The bitset before clear(pos) operation is : " + bset); // using clear(pos) to clear element at specified position bset.clear(3); // printing bitset after clear(pos) operation // removes 3 System.out.println ("The bitset after clear(pos) operation is : " + bset); } } Output: The bitset before clear(pos) operation is : {0, 1, 2, 3, 4} The bitset after clear(pos) operation is : {0, 1, 2, 4} clear(int frompos, int topos) : The clear(int frompos, int topos) method sets the bits from the specified frompos (inclusive) to the specified topos (exclusive) to false i.e performs removal in a range. public void clear(int frompos, int topos) Parameters frompos : index of the first bit to be cleared topos : index of the last bit to be cleared Return Value This method does not return a value. Exception IndexOutOfBoundsException: if frompos is negative, or topos is negative, or frompos is larger than topos. // Java code to demonstrate the working // of clear(int frompos, int topos) in BitSet import java.util.*; public class BitClr3 { public static void main(String[] args) { // Declaring Bitset BitSet bset = new BitSet(8); // assigning values to bitset for (int i = 0; i < 5; i++) bset.set(i); // printing original bitset System.out.println ("The bitset before clear(frompos, topos) operation is : " + bset); // using clear(frompos, topos) to clear elements in range bset.clear(2, 4); // printing bitset after clear(frompos, topos) operation // removes 2, 3 System.out.println ("The bitset after clear(frompos, topos) operation is : " + bset); } } Output: The bitset before clear(frompos, topos) operation is : {0, 1, 2, 3, 4} The bitset after clear(frompos, topos) operation is : {0, 1, 4} Like Article Suggest improvement Previous BitSet size() Method in Java with Examples Next Check if Email Address is Valid or not in Java Share your thoughts in the comments Add Your Comment Please Login to comment...