java - 编译器给我一个 'unreachable statment' 错误

Question

这是我代码中的一个方法，当我尝试编译它时，它向我抛出一个“无法访问的语句”错误。

public static boolean whoareyou(String player)
{
    boolean playerwhat;
    if (player.equalsIgnoreCase("Player 1"))
    {
        return true;
    }
    else
    {
        return false;
    }
    return playerwhat;
}

准确的错误是:

java:82: error: unreachable statement
                return playerwhat;
                ^

然后我尝试使用我在以下代码中返回的这个 boolean 值:

public static int questions(int diceroll, int[] scorep1)
{
 String wanttocont = " ";
 boolean playerwhat;
 for (int i = 0; i <= 6; i++)
 {
   while (!wanttocont.equalsIgnoreCase("No"))
   {
    wanttocont = input("Do you wish to continue?"); 
    // boolean playerwhat; wasn't sure to declare here or outside loop
    if (diceroll == 1)
    {
       String textinput = input("What's 9+10?");
       int ans1 = Integer.parseInt(textinput);
       output("That's certainly an interesting answer.");
       if (ans1 == 19)
       {
          if (playerwhat = true)
          {
             output("Fantastic answer player 1, that's correct!");
             diceroll = dicethrow(diceroll);
             scorep1[0] = scorep1[0] + diceroll;
             output("Move forward " + diceroll + " squares. You are on square " + scorep1[0]);
          }
          else if (playerwhat = false)
          {
             output("Fantastic answer player 2, that's correct!");
             diceroll = dicethrow(diceroll);
             scorep1[1] = scorep1[1] + diceroll;
             output("Move forward " + diceroll + " squares. You are on square " + scorep1[1]);
          }
    } // END if diceroll is 1
   } // END while wanttocont
 } // END for loop
} // END questions

我不确定上面的代码是否与问题相关，但我只是想展示我正尝试对抛出错误的 boolean 值执行的操作。谢谢。

Answer 1

return playerwhat; 永远无法到达，因为 if 或 else 子句将返回 true 或错误。因此，您应该删除此声明。 playerwhat 变量不是必需的。

顺便说一句，您的方法可以替换为单行方法:

public static boolean whoareyou(String player)
{
    return player.equalsIgnoreCase("Player 1");
}

我会将此方法重命名为更具描述性的名称，例如 isFirstPlayer。

编辑:

你永远不会调用 whoareyou 是你的 questions 方法。你应该这样调用它:

替换

if (playerwhat = true) // this is assigning true to that variable, not comparing it to true

与

if (whoareyou(whateverStringContainsTheCurrentPlayer)) {
    ..
} else {
    ...
}