将数组元素与方法的返回值进行比较

Question

public static void main(String[] args) {

    String[] months = {"January", "February", "March","April","May","June","July","August","September","October","November","December"};
    double[] rainfall = new double[months.length];

    Rainfall amazon = new Rainfall();

    //scanner to get user input
    Scanner scanner = new Scanner(System.in);

    //for loop to iterate through the months to get user input of rainfall each month
    for(int i = 0; i<rainfall.length; i++) {
        System.out.println("How much rainfall did you recieve, in inches, for the month of: " + months[i]);
        rainfall[i] = scanner.nextDouble();

        //while statement to reject negative numbers         
        while(rainfall[i] < 0) {
            System.out.println("You can not enter a negative number");
            System.out.println("How much rainfall did you recieve for the month of: " + months[i]);
            rainfall[i] = scanner.nextDouble();  
        }
    }

    System.out.println("total rainfall: " + amazon.getTotalRainfall(rainfall) + 
                       " average Rainfall: " + amazon.getAverageRainfall(rainfall) + 
                       " min: " + amazon.getMinRainfall(rainfall) + 
                       " max: " + amazon.getMaxRainfall(rainfall));

}

public double getMaxRainfall(double[] rainfall) {
    double max = rainfall[0];
    for(int i = 1; i < rainfall.length; i++)
        if(rainfall[i] > max) {
            max = rainfall[i];
        }
    return max;
}      

public double getMinRainfall(double[] rainfall) {
    double min = rainfall[0];
    for(int i = 1; i < rainfall.length; i++)
        if(rainfall[i] < min) {
            min = rainfall[i];
        }
    return min;
}

Answer 1

你可以解决这个问题的方法是跟踪最高降雨量的指数，而不是数值。现在的问题是，您有两个不同的数组，其中一个数组的值与另一个数组没有关联。

为此，您可以这样做：

    public int getMaxRainfallIndex(double[] rainfall) {
        int max = 0;
        for (int i = 1; i < rainfall.length; i++)
            if (rainfall[i] > rainfall[max]) {
                max = i;
            }
        return max;
    } 

然后可以使用这个返回值从原始的2个数组中获得实际的降雨量和月份。

    public static void main(String[] args) {
        Rainfall[] rainfall = new Rainfall[12];
        //Do everything else
    }

    public class Rainfall {
        private String month;
        private double rainfall;

        //Constructor, Getters + Setters
    }