java 集合运算

package testjavapro;
import java.util.BitSet;

public class testjavaa {
 
  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);
  }
}

Initial pattern in bits1: 
{0, 2, 4, 6, 8, 10, 12, 14}

Initial pattern in bits2: 
{1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14}

bits2 AND bits1: 
{2, 4, 6, 8, 12, 14}

bits2 OR bits1: 
{0, 2, 4, 6, 8, 10, 12, 14}

bits2 XOR bits1: 
{}