Java AbstractSequentialList equals()方法及实例

java.util.AbstractSequentialList 类的 equals() 方法用于检查这个AbstractSequentialList对象是否与作为参数传递的对象相等。该方法返回一个布尔值，说明两者相同。

语法

public boolean equals(Object o)

参数： 该方法以对象o为参数，与该列表进行平等比较。

返回值： 如果指定的对象与这个列表相等，该方法返回真。

下面是说明 equals() 方法的例子。

例1 :

// Java program to demonstrate equals()
// method of AbstractSequentialList
  
import java.util.*;
  
public class GFG {
    public static void main(String[] argv)
    {
  
        // Creating object of AbstractSequentialList<String>
        AbstractSequentialList<String>
            arrlist1 = new LinkedList<String>();
  
        // Populating arrlist1
        arrlist1.add("A");
        arrlist1.add("B");
        arrlist1.add("C");
        arrlist1.add("D");
        arrlist1.add("E");
  
        // print arrlist1
        System.out.println("First AbstractSequentialListlist: "
                           + arrlist1);
  
        // Creating another object of AbstractSequentialList<String>
        AbstractSequentialList<String>
            arrlist2 = new LinkedList<String>();
  
        // Populating arrlist2
        arrlist2.add("A");
        arrlist2.add("B");
        arrlist2.add("C");
        arrlist2.add("D");
        arrlist2.add("E");
  
        // print arrlist2
        System.out.println("Second AbstractSequentialList: "
                           + arrlist2);
  
        // comparing first AbstractSequentialList to another
        // using equals() method
        boolean value
            = arrlist1.equals(arrlist2);
  
        // print the value
        System.out.println("Are both list equal: "
                           + value);
    }
}

输出。

First AbstractSequentialListlist: [A, B, C, D, E]
Second AbstractSequentialList: [A, B, C, D, E]
Are both list equal: true

例2 :

// Java program to demonstrate equals()
// method of AbstractSequentialList
  
import java.util.*;
  
public class GFG1 {
    public static void main(String[] argv)
    {
  
        // Creating object of AbstractSequentialList
        AbstractSequentialList<Integer>
            arrlist1 = new LinkedList<Integer>();
  
        // Populating arrlist1
        arrlist1.add(10);
        arrlist1.add(20);
        arrlist1.add(30);
        arrlist1.add(40);
        arrlist1.add(50);
  
        // print arrlist1
        System.out.println("First AbstractSequentialListlist: "
                           + arrlist1);
  
        // Creating another object of AbstractSequentialList
        AbstractSequentialList<Integer>
            arrlist2 = new LinkedList<Integer>();
  
        // Populating arrlist2
        arrlist2.add(10);
        arrlist2.add(20);
        arrlist2.add(30);
  
        // print arrlist2
        System.out.println("Second AbstractSequentialList: "
                           + arrlist2);
  
        // comparing first AbstractSequentialList to another
        // using equals() method
        boolean value = arrlist1.equals(arrlist2);
  
        // print the value
        System.out.println("Are both list equal: "
                           + value);
    }
}

输出。

First AbstractSequentialListlist: [10, 20, 30, 40, 50]
Second AbstractSequentialList: [10, 20, 30]
Are both list equal: false