java - 通过java数组访问float变量

Question

我是Java新手，我一直在编写一个程序来练习。贝娄是该程序的有问题的类。我试图通过数组操作浮点变量，但我似乎无法以这种方式影响它们(例如 array[i] = 1)，也无法获取它们的值(始终为 0.0)，但可以直接访问它们(例如，variable = 1) )有效。谁能告诉我我做错了什么？谢谢。

public class Statistics {
    private float switchWin, switchLose, stayWin, stayLose, gamesPlayed, switchWinP, switchLoseP, stayWinP, stayLoseP;
    private float statisticsArray[] = {switchWin, switchLose, stayWin, stayLose, gamesPlayed, switchWinP, switchLoseP, stayWinP, stayLoseP};

    public void setSwitchWin() {
        switchWin++;
    }

    public void setSwitchLose() {
        switchLose++;
    }

    public void setStayWin() {
        stayWin++;
    }

    public void setStayLose() {
        stayLose++;
    }

    public void setGamesPlayed() {
        gamesPlayed++;
    }

    public String getSwitchWinPercentage() {
        return Float.toString(switchWinP = (switchWin/gamesPlayed)*100);
    }

    public String getSwitchLosePercentage() {
        return Float.toString(switchLoseP = (switchLose/gamesPlayed)*100);
    }

    public String getStayWinPercentage() {
        return Float.toString(stayWinP = (stayWin/gamesPlayed)*100);
    }

    public String getStayLosePercentage() {
        return Float.toString(stayLoseP = (stayLose/gamesPlayed)*100);
    }

    public String getGamesPlayed() {
        return Integer.toString((int) gamesPlayed);
    }

    public void reset() {
        for(int i=0; i<statisticsArray.length; i++) {
            System.out.println(statisticsArray[i]);
            statisticsArray[i]=0.0f;
            System.out.println(statisticsArray[i]);
        }
    }
}

Answer 1

在 Java 中，基元(float、int 等)不能像对象一样被引用，也不能通过引用传递。

statisticsArray 不保存对初始化它的变量的引用，它会在您初始化时在数组内创建变量的副本执行此调用。

private float statisticsArray[] = {switchWin, switchLose, stayWin, [..]};

statisticsArray 现在保存 switchWin 等变量的默认值 (0)。