java - 为什么终端不提示此 JAVA 代码的另一个输入？

Question

class test {
 public static void main(String args[])
  throws java.io.IOException {

    char ch, answer = 'K';

    System.out.println("I'm thinking of a letter between A and Z.");
    System.out.print("Can you guess it: ");

    ch = (char) System.in.read();

    if(ch == answer) {
     System.out.println(" *** YOU ARE RIGHT *** ");   
       else System.out.println("Please try again: ");
        ch = (char) System.in.read();        
   }
  }

}

我正在使用命令行来运行这个java程序，我希望用户能够连续输入一些东西，而不是每次猜错时都必须手动运行程序。尝试了很多方法，但第二种方法System.in.read()没有显示提示，而是代码只在终端结束，必须再次手动运行程序才能播放。我是初学者，所以我很难理解。

标签： java

Answer 1

这将起作用：

import java.util.Scanner;
class test {
    public static void main(String args[]) throws java.io.IOException {
            char ch, answer = 'K';
            Scanner s = new Scanner(System.in);
            System.out.println("I'm thinking of a letter between A and Z.");
            System.out.print("Can you guess it: ");
            ch = s.next().charAt(0);
            if(ch == answer){
                    System.out.println(" *** YOU ARE RIGHT *** ");
            } else{
                    System.out.println("Please try again: ");
                    ch = s.next().charAt(0);
            }
    }
}