Java BitSet equals()方法及示例

Java BitSet类的equals()方法是用来检查两个比特集之间是否相等。它验证作为参数传递的一个集合的元素是否与这个集合的元素相等。如果比特集匹配，该方法返回真，否则返回假。

语法

Bit_Set1.equals(Bit_Set2)

参数： 该方法接受一个比特集类型的参数Bit_Set2，指的是要用这个比特集检查其平等性的集合。

返回值： 如果两个对象集的平等性都成立，该方法返回真，否则返回假。

下面的程序说明了Java中BitSet equals()方法的工作。

程序1 :

// Java code to illustrate equals()
import java.util.*;
  
public class BitSet_Demo {
    public static void main(String args[])
    {
        // Creating an empty BitSet
        BitSet bit_set1 = new BitSet();
        BitSet bit_set2 = new BitSet();
  
        // Use set() method to add elements into the Set
        bit_set1.set(40);
        bit_set1.set(25);
        bit_set1.set(80);
        bit_set1.set(95);
        bit_set1.set(5);
  
        // Use set() method to add elements into the Set
        bit_set2.set(25);
        bit_set2.set(40);
        bit_set2.set(5);
        bit_set2.set(95);
        bit_set2.set(80);
  
        // Displaying the BitSets
        System.out.println("First BitSet: " + bit_set1);
        System.out.println("Second BitSet: " + bit_set2);
  
        // Checking for equality
        System.out.println("Are the sets equal? "
                           + bit_set1.equals(bit_set2));
    }
}

输出。

First BitSet: {5, 25, 40, 80, 95}
Second BitSet: {5, 25, 40, 80, 95}
Are the sets equal? true

程序2

// Java code to illustrate equals()
import java.util.*;
  
public class BitSet_Demo {
    public static void main(String args[])
    {
        // Creating an empty BitSet
        BitSet bit_set1 = new BitSet();
        BitSet bit_set2 = new BitSet();
  
        // Use set() method to add elements into the Set
        bit_set1.set(40);
        bit_set1.set(25);
        bit_set1.set(80);
        bit_set1.set(95);
        bit_set1.set(5);
  
        // Use set() method to add elements into the Set
        bit_set2.set(10);
        bit_set2.set(20);
        bit_set2.set(30);
        bit_set2.set(40);
        bit_set2.set(50);
  
        // Displaying the BitSets
        System.out.println("First BitSet: " + bit_set1);
        System.out.println("Second BitSet: " + bit_set2);
  
        // Checking for equality
        System.out.println("Are the sets equal? "
                           + bit_set1.equals(bit_set2));
    }
}

输出。

First BitSet: {5, 25, 40, 80, 95}
Second BitSet: {10, 20, 30, 40, 50}
Are the sets equal? false