字符串反转，一行代码就可解决，java也可如此简单

两种实现方法，String和StringBuffer

import java.util.Scanner;

/**
 * @Auther: 206069780
 * @Date: 2020/4/21 08:58
 */
public class Main {

/*1、采用数组的反转形式反转*/
    public static String ans(String string){
        String ans="";
        for(int i=string.length()-1;i>=0;i--){
            ans+=string.charAt(i);
        }
        return ans;
    }
/*采用Stringbuffer的reverse()方法反转*/
    public static String string(StringBuffer stringBuffer){
        return stringBuffer.reverse().toString();
    }
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        String string=scanner.nextLine();
        StringBuffer str=new StringBuffer(string);
        System.out.println(ans(string));
        System.out.println(string(str));
    }
}