list string互转

package com.test;import java.util.ArrayList;import java.util.Arrays;import java.util.List;public class Test {public static void main(String[] args) {//list转stringList<String> lst = new ArrayList<String>();lst.add("1");lst.add("2");String s = lst.toString();s = s.substring(1, s.length()-1);System.out.println(s);//打印出：1, 2//string转listString[] arr = s.split(",");List list = Arrays.asList(arr);  System.out.println(list.toString());//打印出：[1,  2]}}