编译器给我一个“无法达到的状态”错误

Question

这是我的代码中的一个方法，当我试图编译它时，它会抛出一个“无法到达的语句”错误。

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

确切的错误是：

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

然后，我尝试使用以下代码返回的布尔值：

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这个问题相关，但我只想展示一下我试图用布尔值做什么，这个布尔值会给我带来错误。谢谢。

Answer 1

永远无法到达return playerwhat;，因为if或else子句将返回true或false。因此，您应该删除此语句。不需要playerwhat变量。

顺便说一句，您的方法可以替换为一个线性方法：

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

我将此方法重命名为更具描述性的方法，如isFirstPlayer。

编辑：

您从不调用whoareyou是您的questions方法。你应该称之为：

替换

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

使用

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

Answer 2

只需这样更新代码即可。

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

Answer 3

试试这个：

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

你有问题，因为：

还球员什么；

永远达不到。您可以通过“if”或“either”-part退出函数。