java变量无法解决 [英] java Variable cannot be resolved

问题描述

最后一行代码给出错误p1无法解决。我相信这是因为它不在范围内，但我不确定如何解决这个问题。谢谢任何帮助赞赏。

The final line of code gives an error p1 cannot be resolved. I believe this is due to it not being in scope but i am unsure how to resolve this problem. Thanks any help appreciated.

switch (Player1) 
{
    case "Human":
    { 
        HumanPlayer p1 = new HumanPlayer(sc, theGame);
        break;
    }
    case "Simple":
    { 
        SimpleComputerPlayer p1 = new SimpleComputerPlayer();
        break;
    }
    case "Random":
    { 
        RandomComputerPlayer p1 = new RandomComputerPlayer();
        break;
    }
    case "Expert":
    { 
        ExpertPlayer p1 = new ExpertPlayer();
        break;
    }
}                                                            
p1.setMySymbol(SquareStatus.CROSS);

推荐答案

声明 Player p1 开关外。

Declare Player p1 outside of the switch.

Player p1;
switch (Player1) {...}
if(p1 != null) p1.setMySymbol(SquareStatus.CROSS);

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