LinkedList
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package edu.xcdq.list;

import java.util.ArrayList;
import java.util.LinkedList;

public class LinkedListDemo01 {
public static void main(String[] args) {

LinkedList<String> list=new LinkedList<>();//数组列表  底层是数组
    list.add("111");
    list.add("222");
    list.add("333");
    list.add("444");
    list.add("555");//增加
    System.out.println(list);
    list.remove(1);//减少
    list.remove("444");
    System.out.println(list);
    list.set(2,"55555");//修改
    System.out.println(list);

//查询
    for (String l :list){
    System.out.println(l+"\t");
}
    System.out.println();
    for (int i = 0;i<list.size();i++){
    System.out.println(list.get(i)+"\t");
}

}
}
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ArrayList
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package edu.xcdq.list;

import java.util.ArrayList;

public class ArrayListDemo01 {
public static void main(String[] args) {
String [] str = new String[]{"1e21","12q","aqwdfqw"};
str[0]="111";
str[1]="222";
str[2]="333";
//删除位置为1的元素
str[1]=str[2];
str[2]=null;

    ArrayList<String>list=new ArrayList<>(99999999);//数组列表  底层是数组
    list.add("111");
    list.add("222");
    list.add("333");
    list.add("444");
    list.add("555");//增加
    System.out.println(list);
    list.remove(1);//减少
    list.remove("444");
    System.out.println(list);
    list.set(2,"55555");//修改
    System.out.println(list);

    //查询
    for (String l :list){
        System.out.println(l+"\t");
    }
    System.out.println();
    for (int i = 0;i<list.size();i++){
        System.out.println(list.get(i)+"\t");
    }
}

}
...