列表迭代器

package com.study.exception.demo20;

import java.util.ArrayList;
import java.util.List;
import java.util.ListIterator;

public class ListIteratorDemo {
    

    public static void main(String[] args) {
        List lis = new ArrayList<>();
        lis.add("张三");
        lis.add("李四");
        lis.add("王五");

        ListIterator sList = lis.listIterator();
        while (sList.hasNext()){
            String next = sList.next();
            System.out.println(next);
        }

        System.out.println("============================");

        while (sList.hasPrevious()){
            String previous = sList.previous();
            System.out.println(previous);
        }

        System.out.println("============================");

        while (sList.hasNext()) {
            String s = sList.next();
            if (s == "李四"){
                sList.add("猴子");
            }
        }
        System.out.println(lis);
    }
}