ArrayList 小例子

 

实现ArrayList 双重循环  小例子

public class TestArrayList {public static void main(String[] args) {ArrayList<ArrayList<String>>  out=new ArrayList<ArrayList<String>>();ArrayList<String> inside=new ArrayList<String>();   for (int i = 0; i < 10; i++) {        for (int j = 0; j < 5; j++) {      inside.add(j+"");   }      out.add(inside);      }   System.out.println(out.toString());}}