package edu.xcdq.list;
import java.util.ArrayList;
import java.util.List;
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<>();
list.add("111");
list.add("222");
list.add("333");
list.add("444");
list.add("555");//增加
System.out.println(list);
list.remove(1);//删除
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");
}
for (int i=0;i<list.size();i++){
System.out.println(list.get(i)+"\t");
}
}
}
