java - 否定不适用于 .equalsIgnoreCase()

Question

我正在尝试运行一个 do...while 条件不满足，但出于某种原因，无论条件值如何，我的代码每次都会循环。我已经检查了我的调试器，变量的值是正确的，并且根据类似的逻辑满足循环内的条件。出于某种原因，! 不起作用。这是我的代码

do
  {
     if(isRaceHorse.equalsIgnoreCase("Y"))
     {
        System.out.print("Please enter the number of races your horse has been in >> ");
        numRaces = input.nextInt();
        input.nextLine();
        System.out.println("Your horse is named " + name + " it is a " + color + " horse born in " + birthYear + " and it has been in " + numRaces + " races.");
     }
     else if(isRaceHorse.equalsIgnoreCase("N"))
     {
        System.out.println("Your horse is named " + name + " it is a " + color + " horse born in " + birthYear + ".");
     }
     else
     {
        System.out.println("Please use Y for yes and N for no.");
        System.out.print("Is your horse a race horse? Enter Y for yes and N for no >> ");
        isRaceHorse = input.nextLine();
     }
  }while(!(isRaceHorse.equalsIgnoreCase("y")) || !(isRaceHorse.equalsIgnoreCase("n")));

有人知道为什么这没有给我我想要的东西吗？

Answer 1

!(isRaceHorse.equalsIgnoreCase("y")) || !(isRaceHorse.equalsIgnoreCase("n"))

在英语中，这意味着只要 isRaceHorse 不等于 "y" 或 isRaceHorse<，循环就会继续 不等于 "n"。因为它不能同时等于 "y" 和 "n"，我很确定你想使用 &&相反:

!isRaceHorse.equalsIgnoreCase("y") && !isRaceHorse.equalsIgnoreCase("n")