Java 中的抽象顺序列表集合()方法，示例

原文:https://www . geesforgeks . org/abstractsequentialist-set-method-in-Java-with-examples/

Java . util . abstractsequentialist的 set() 方法用于将使用 LinkedList 类创建的序列列表中的任何特定元素替换为另一个元素。这可以通过在 set()方法的参数中指定要替换的元素和新元素的位置来实现。

语法:

AbstractSequentialList.set(int index, Object element)

参数:该函数接受两个参数，如上语法所示，如下所述。

  • 索引:这是整数类型，指的是列表中要替换的元素的位置。
  • 元素:是替换现有元素的新元素，与顺序列表的对象类型相同。

返回值:该方法返回序列列表中被新值替换的前一个值。

下面的程序说明了 Java . util . abstractsequentialilist . set()方法:

例 1:

// Java code to illustrate set()

import java.util.*;
import java.util.AbstractSequentialList;

public class AbstractSequentialListDemo {
    public static void main(String args[])
    {
        // Creating an empty AbstractSequentialList
        AbstractSequentialList<String>
            absqlist = new LinkedList<String>();

        // Use add() method to add elements in the list
        absqlist.add("Geeks");
        absqlist.add("for");
        absqlist.add("Geeks");
        absqlist.add("10");
        absqlist.add("20");

        // Displaying the AbstractSequentialList
        System.out.println("AbstractSequentialList:"
                           + absqlist);

        // Using set() method to replace Geeks with GFG
        System.out.println("The Object that is replaced is: "
                           + absqlist.set(2, "GFG"));

        // Using set() method to replace 20 with 50
        System.out.println("The Object that is replaced is: "
                           + absqlist.set(4, "50"));

        // Displaying the modified linkedlist
        System.out.println("The new List is:" + absqlist);
    }
}

Output:

AbstractSequentialList:[Geeks, for, Geeks, 10, 20]
The Object that is replaced is: Geeks
The Object that is replaced is: 20
The new List is:[Geeks, for, GFG, 10, 50]

例 2:

// Java code to illustrate set()

import java.util.*;
import java.util.AbstractSequentialList;

public class AbstractSequentialListDemo {
    public static void main(String args[])
    {

        // Creating an empty AbstractSequentialList
        AbstractSequentialList<Integer>
            absqlist = new LinkedList<Integer>();

        // Use add() method to add elements in the list
        absqlist.add(50);
        absqlist.add(40);
        absqlist.add(30);
        absqlist.add(20);
        absqlist.add(10);

        // Displaying the AbstractSequentialList
        System.out.println("AbstractSequentialList:"
                           + absqlist);

        // Using set() method to replace 40 with 400
        System.out.println("The Object that is replaced is: "
                           + absqlist.set(1, 400));

        // Using set() method to replace 10 with 100
        System.out.println("The Object that is replaced is: "
                           + absqlist.set(4, 100));

        // Displaying the modified linkedlist
        System.out.println("The new List is:" + absqlist);
    }
}

Output:

AbstractSequentialList:[50, 40, 30, 20, 10]
The Object that is replaced is: 40
The Object that is replaced is: 10
The new List is:[50, 400, 30, 20, 100]

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