408遞迴字串反向

/******
檔名：JPA04.java
題目：TQC+ JAVA6物件導向程式設計 參考答案
時間：2015/06
作者：fang shi mai
******/
import java.util.Scanner;

public class JPA04
{
    static Scanner keyboard = new Scanner(System.in);
    
    public static void main(String args[])
    {
        String s, c; 
        System.out.print("Input a string: ");
        s = keyboard.nextLine();
        System.out.printf("%s\n", reverse(s));
        System.out.print("Input a string: ");
        s = keyboard.nextLine();
        System.out.printf("%s\n", reverse(s));
    }
    public static String reverse(String a)
    {
        if(a.equals(""))
            return a;
        return reverse(a.substring(1))+a.substring(0,1);
    }
}