Huffman Encoder(SizeReduction)

#1

didn’t understand the use of BitSet.is it used to convert encoded string to bits for reduction of size.
It would be really appriciated if you can brief me about BitSet .

#2

The BitSet class creates a special type of array that holds bit values. The BitSet array can increase in size as needed.

import java.util.BitSet;
public class BitSetDemo {

  public static void main(String args[]) {
      BitSet bits1 = new BitSet(16);
      BitSet bits2 = new BitSet(16);
      
      // set some bits
      for(int i = 0; i < 16; i++) {
         if((i % 2) == 0) bits1.set(i);
         if((i % 5) != 0) bits2.set(i);
      }
     
      System.out.println("Initial pattern in bits1: ");
      System.out.println(bits1);
      System.out.println("\nInitial pattern in bits2: ");
      System.out.println(bits2);

      // AND bits
      bits2.and(bits1);
      System.out.println("\nbits2 AND bits1: ");
      System.out.println(bits2);

      // OR bits
      bits2.or(bits1);
      System.out.println("\nbits2 OR bits1: ");
      System.out.println(bits2);

      // XOR bits
      bits2.xor(bits1);
      System.out.println("\nbits2 XOR bits1: ");
      System.out.println(bits2);
   }
}

You can run this code and refer the output

This class implements a vector of bits that grows as needed. Each component of the bit set has a boolean value. The bits of a BitSet are indexed by nonnegative integers. Individual indexed bits can be examined, set, or cleared. One BitSet may be used to modify the contents of another BitSet through logical AND, logical inclusive OR, and logical exclusive OR operations.
By default, all bits in the set initially have the value false.

Every bit set has a current size, which is the number of bits of space currently in use by the bit set. Note that the size is related to the implementation of a bit set, so it may change with implementation. The length of a bit set relates to logical length of a bit set and is defined independently of implementation.

Unless otherwise noted, passing a null parameter to any of the methods in a BitSet will result in a NullPointerException.

A BitSet is not safe for multithreaded use without external synchronization.

1 Like
#3

I am closing the doubt if you have any issue just reopen the thread
Hope this helps

#4