关于ArrayList 的基础知识的小程序

package cn.edu.hpu.hlj;

import java.util.ArrayList;

public class test {

public static void main(String[] args) {

ArrayList<String> list = new ArrayList<String>();

ArrayList<String> list1 = new ArrayList<String>();

ArrayList<ArrayList<String>> a = new ArrayList<ArrayList<String>>();

list.add("s");

list.add("h");

list.add("e");

System.out.println("list中的元素为："+list);

list.remove(0);

System.out.println(list.indexOf("h"));

System.out.println(list.get(0));

a.add(list);

list1.add("s1");

list1.add("h1");

list1.add("e1");

a.add(list1);

System.out.println(a.size());

System.out.println(a.get(0));

}

}