BitSet.cardinality() has the following syntax.
public int cardinality()
In the following code shows how to use BitSet.cardinality() method.
import java.util.*; //from ww w. j a va 2s. com public class Main { public static void main(String[] args) { BitSet bitset1 = new BitSet(8); BitSet bitset2 = new BitSet(8); // assign values to bitset1 bitset1.set(0); bitset1.set(1); bitset1.set(2); // assign values to bitset2 bitset2.set(2); bitset2.set(4); // print the sets System.out.println("Bitset1:" + bitset1); System.out.println("Bitset2:" + bitset2); // print cardinality for bitset1 System.out.println(bitset1.cardinality()); // print cardinality for bitset2 System.out.println(bitset2.cardinality()); } }
The code above generates the following result.