重复一个方法

Question

如果没有键入是或否，如果我想重复该方法，我将如何处理？我试过了：

while (!answer.equals("yes") && !answer.equals("no")) {

但它一直在输入 "please answer either yes or no" 而没有给出再次写入的选项。

感谢

import acm.program.*;

public class YesOrNoQuestion extends ConsoleProgram {
 public void run() {
  println("This program asks you whether you want instructions");
  String answer = readLine("Type your answer here: ");
  YesOrNo(answer);
 }

 private void YesOrNo(String answer) {
  if (answer.equals("yes")) {
   println("Alright here you go");
  } if (answer.equals("no")) {
   println("Alright fine");
  } else println("Please type either yes, or no: ");
  
 }
}

Answer 1

• 您缺少 else if!!
  
• 此外，使用 String::toLowerCase() 将用户条目转换为小写字母以获得 NO、nO、No 和 no。
• 要在控制台中打印，请使用 System.out.println()

private void YesOrNo(String answer) {
    if (answer.toLowerCase.equals("yes")) {
        System.out.println("Alright here you go");
    } else if (answer.toLowerCase.equals("no")) {
    //↑ here!!!
        System.out.println("Alright fine");
    } else {
        System.out.println("Please type either yes, or no: ");
        run();
    }

}