Java 迴文

import java.util.Scanner;

public class Palindrome{
        public static void main(String[] args){
                Scanner sc = new Scanner(System.in);
                String str;
  
                while( sc.hasNext() ){
                        str = sc.nextLine();
   
                        String tmp = "";
                        int length = str.length() - 1;
                        for(int i = length; i >= 0; i--){
                                tmp += str.charAt(i);
                        }
   
                        if( str.equals(tmp) ){
                                System.out.println("yes");
                        }
                        else{
                                System.out.println("no");
                        }
                }
        }
}

題目
參考程式