package Test03;

import java.util.ArrayList;

import java.util.List;

public class ReverseList {

    public static void main(String[] args) {

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

        list.add("Hello");

        list.add("World");

        list.add("Learn");                     //此时list 为Hello World Learn 

        StringBuffer a = new StringBuffer();

        for(String s:list){

                a.append(s);

        }

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

        //reverseList(list);

        //StringBuilder b = new StringBuilder(list.toString());

        //System.out.println(list);

        System.out.println(a.reverse().toString());

    }

}