210 鍵盤字元判斷

import java.util.*;
class JPA210 {
    static Scanner keyboard = new Scanner(System.in);
    public static void main(String[] args) {
        test();
        test();
        test();
        test();
        test();
    }

    public static void test() {
        String s;
        System.out.println("Input a character :");
        s=keyboard.next();
switch(s){
case "a":
case "b":
System.out.println("You entered a or b");break;
case "x":
System.out.println("You entered x");break;
case "y":
System.out.println("You entered y");break;
default:
System.out.println("You entered something else.");break;
}
        
    }
}