Verifying if the BitSet is empty

A bit set is considered as empty when all the values in it are false. The BitSet class provides the isEmpty() method. This method returns a boolean value, which is false when the current BitSet is empty and true when it is not empty.

You can verify whether a particular BitSet is empty using the isEmpty() method.

Example

import java.util.BitSet;
public class isEmpty {
   public static void main(String args[]) {
      BitSet bitSet = new BitSet(10);  
      
      for (int i = 1; i<25; i++) {
         if(i%2==0) {
            bitSet.set(i);
         }      
      }
      
      if (bitSet.isEmpty()) {
         System.out.println("This BitSet is empty");    
      } else {
         System.out.println("This BitSet is not empty"); 
         System.out.println("The contents of it are : "+bitSet);
      }
      bitSet.clear();
      
      if (bitSet.isEmpty()) {
         System.out.println("This BitSet is empty");    
      } else {
         System.out.println("This BitSet is not empty"); 
         System.out.println("The contents of it are : "+bitSet);
      }    
   }
}

Output

This BitSet is not empty
The contents of it are : {2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24}
This BitSet is empty