Question

我希望实现一个Android应用程序，它根据温度和湿度这两个参数计算热量指数。我可以从 JSON 中提取两个变量，并将它们与下表进行比较：

Heat Index Table http://www.eurometeo.com/img/humidex.gif

我正在考虑将此表存储为Matrix，bun我不知道如何比较数据并返回适当的值。

提前感谢您的帮助。

此致泰特斯

Answer 1

这是一个选项：

public class HeatIndexTable {

    // TODO write unittests for all methods in this class

    public static int minHumidity = 25;
    public static int maxHumidity = 100;
    public static int humidityStep = 5;

    public static int minTemperature = 22;
    public static int maxTemperature = 42;

    /** converts a humidity percentage to an index in our array */
    int humidityToIndex(int humidity) {
        if (humidity < minHumidity || humidity > maxHumidity || humidity % humidityStep != 0) {
            throw new IllegalArgumentException("Cannot handle humidity " + humidity);
        }
        return (humidity - minHumidity) / humidityStep;
    }

    /** converts a temperature in degrees to an index in our array */
    int temperatureToIndex(int temperature) {
        if (temperature < minTemperature || temperature > maxTemperature) {
            throw new IllegalArgumentException("Cannot handle temperature " + temperature);
        }
        return temperature - minTemperature;
    }

    int[][] heatIndex = new int[][] {
            { 22, 22, 22, 22, 23, /* etc. */ 31 },
            { 23, 23 /* etc. */ }
            // TODO fill in the rest
    };

    public int getHeatIndex(int temperature, int humidity) {
        return heatIndex[temperatureToIndex(temperature)][humidityToIndex(humidity)];
    }

}

有了这个，你可以去：

System.out.println(new HeatIndexTable().getHeatIndex(22, 45)); // prints 23

希望它有所帮助。

基于矩阵参数的返回值

1 个答案: