如何在一个Java的另一个方法中将一个方法的变量作为变量？

问题描述

这里我试图将我的'cash'变量从Player方法中包含在我的wagerBet（）方法中的等式中。目前Eclipse告诉我变量'cash'不能'静态引用非静态现金'。我试着寻找关于这个问题意味着什么的解释，但我只是得到解释，使用更多的编程术语我不明白是因为我是这个东西的新手。

Here I am trying to have my 'cash' variable from the Player method be included in an equation in my wagerBet() method. Currently Eclipse is telling me that variable 'cash' cannot 'make a static reference to the non-static field cash'. I tried looking for explanations as to what this problem means but I'm just getting explanations that use even more programming terminology I don't understand being that I'm a rookie at this stuff.

class Player {
    private ArrayList<Card>hand;
    private double cash, bet;

    public Player(double theCash)
    {
        cash = theCash; //'cash' variable here
        hand = new ArrayList<Card>();
    }

    public static double wagerBet()
    {
        Scanner in = new Scanner(System.in);
        System.out.print("Wager a bet: ");
        double bet = in.nextDouble();
        cash = cash - bet; // needs to be transferred here
        System.out.println("You wagered " + bet + ". " + "Now you have " + cash + " cash left.");
        return bet;
    }

    public void rewardBet(double bet)
    {
        cash = cash + (bet * 2); //cash and bet variable needs to be transferred here as well
        System.out.println("You now have " + cash + "cash.");
    }

有什么建议吗？

推荐答案

现金变量不属于任何方法。它是该类的实例成员。您无法从静态方法访问它。如果您只需要在那里读取它的值，请将该方法设置为非静态，或将现金作为参数传递给它。

The cash variable doesn't belong to any method. It is an instance member of the class. You can't access it from a static method. Make the method non-static, or pass 'cash' to it as a parameter if you only need to read its value there.

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