集合框架07：LinkedList使用

1.视频链接：13.14 LinkedList使用_哔哩哔哩_bilibilihttps://www.bilibili.com/video/BV1zD4y1Q7Fw?spm_id_from=333.788.videopod.episodes&vd_source=b5775c3a4ea16a5306db9c7c1c1486b5&p=142.LinkedList集合的增删改查操作

java 复制代码

package com.yundait.Demo01;

import javax.swing.*;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.ListIterator;

public class LinkedListDemo01 {
    public static void main(String[] args) {
        //创建集合
        LinkedList linkedList = new LinkedList<>();

        //1.添加元素
        Student s1 = new Student("刘德华", 30);
        Student s2 = new Student("张学友", 30);
        Student s3 = new Student("郭富城", 30);
        Student s4 = new Student("梁朝伟", 30);
        linkedList.add(s1);
        linkedList.add(s2);
        linkedList.add(s3);
        linkedList.add(s4);

        //2.删除元素
//        linkedList.remove(s1);
//        linkedList.remove( new Student("张学友", 30));
        System.out.println("删除后元素个数" + linkedList.size());
        System.out.println(linkedList.toString());


        //3.遍历元素
        //3.1使用for循环
        System.out.println("-------使用for循环---------");
        for (int i = 0; i < linkedList.size(); i++) {
            System.out.println((Student)linkedList.get(i));
        }
        //3.2使用增强for循环
        System.out.println("-------使用for循环---------");
        for (Object object : linkedList) {
            Student s = (Student) object;
            System.out.println(s.toString());
        }
        //3.2使用iterator迭代器
        System.out.println("-------使用iterator迭代器---------");
        Iterator iterator = linkedList.iterator();
        while (iterator.hasNext()){
            Student s = (Student) iterator.next();
            System.out.println(s.toString());
        }

        //3.2使用listIterator迭代器
        System.out.println("-------使用iterator迭代器---------");
        ListIterator listIterator = linkedList.listIterator();
        while (listIterator.hasPrevious()){
            Student s = (Student) listIterator.next();
            System.out.println(s.toString());
        }


        //4.判断元素是否在集合中
        System.out.println(linkedList.contains(s3));
        System.out.println(linkedList.isEmpty());


        //5.获取元素在集合中的位置
        System.out.println(linkedList.indexOf(s4));
    }
}

代码运行结果：