Java中的 AbstractSequentialList equals() 方法和示例

Java.util.AbstractSequentialList类的equals()方法用于检查这个AbstractSequentialList 对象是否等于作为参数传递的对象。此方法返回一个布尔值，说明相同。

句法：

public boolean equals(Object o)

参数：此方法将对象 o作为参数，以便与此列表比较是否相等。

返回值：如果指定的对象等于此列表，则此方法返回true 。

下面是说明equals()方法的示例。

示例 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
        AbstractSequentialList
            arrlist1 = new LinkedList();
  
        // 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
        AbstractSequentialList
            arrlist2 = new LinkedList();
  
        // 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

示例 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
            arrlist1 = new LinkedList();
  
        // 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
            arrlist2 = new LinkedList();
  
        // 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