Java输入一个整数，将这个整数以字符串的形式逆序输出

import java.util.Scanner;

public class Demo3 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str = scanner.nextLine();
        StringBuffer stringBuffer = new StringBuffer(str);
        /*
            这里最推荐的是方法2
         */
        //fun1(stringBuffer);
        fun2(str);
    }

    private static void fun1(StringBuffer stringBuffer) {
        stringBuffer.reverse();
        System.out.println(stringBuffer.toString());
    }
    private static void fun2(String str){
        for (int i =str.length()-1;i>=0;i--){
            System.out.print(str.charAt(i));
        }
    }

}

1516000
0006151
Process finished with exit code 0