Java.util.BitSet.clear() in Java

There are three variants of clear() method:

1. 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 : {}
   

2. 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}
   

3. 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}
   

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