Question

我很困惑为什么我不能介入这些if语句中的任何一个。我错过了一些非常简单的东西吗？我输入aa或AA或c或C，它不会进入if语句。有什么想法吗？

while(play){
        String answer;
        Scanner input = new Scanner( System.in );
        System.out.println("Please select an option");
         answer = input.nextLine();
         answer = answer.toUpperCase().trim();
         System.out.println(answer);

     if(answer == "AA"){
         System.out.println("Have fun!");
         System.out.println("Enter player 1's name");
         Player player1 = new Player(input.nextLine());
         System.out.println("Enter player 2's name");
         Player player2 = new Player(input.nextLine());

         System.out.println(player1.getName());
         System.out.println(player1.getCash());
     }

     else if (answer == "C"){
         play = false;
         System.out.println("Thanks for playing");
     }



}

Answer 1

对于比较字符串，您需要使用equals方法。例如：

if(answer.equals("AA")){

请注意，这将比较区分大小写。如果您不想使用区分大小写：

if(answer.equalsIgnoreCase("AA")){

程序没有踩到if语句

1 个答案: