package com.example;


import java.util.Scanner;

public class Test {

    public static void main(String[] args) {

        Scanner sc=new Scanner(System.in);
        System.out.println("請輸入一個字串");
        String line = sc.nextLine();

        System.out.println(isSymmetric(line));
        System.out
 
.println(isSymmetric1(line));
    }
    //方法一
public static boolean isSymmetric(String line){

        char[] chars=line.toCharArray();
        boolean flag=true;
        for (int start=0,end=chars.length-1;start<end;start++,end--){
            if (chars[start]!=chars[end]){
                flag=false
 
;
                break;
            }
        }
        return flag;
    }
    //方法二
public static boolean isSymmetric1(String line){

        return new StringBuffer(line).reverse().toString().equals(line);
    }

}

輸入abc 結果為 false 輸入abcba結果為true