我正在编写一个程序,该程序读取天气数据的.txt文件,并且除其他事项外,还要记录一年中每一天的各种天气模式。

.txt文件具有365行各种值(一年中的每一天都有一行值)。每行都包含高温,低温和天气状态(格式为由六个1和0组成的String,其中1表示当天发生了雾/雨/雪/冰雹/雷电/龙卷风)。例如,String 011000表示同时下雨和下雪。

示例天气文件看起来像(换行符为空格):

高,低,天气字符串:

45,32.4,100000

43.2、35、100001

50.2,32.1 101101

我已经完成了跟踪weather.txt文件并跟踪年度最高和年度最低的程序的绝大部分,但是在计算每种类型(6种类型)的天气状况时遇到了麻烦。我意识到我并没有尽全力去解释,但是我的目标是对所有365个格式化的String值保持计数,每个String索引中有多少个1。因此,在查看上面的示例天气文件时,我的最终结果将是[3,0,1,1,0,2]。

在下面的粘贴方法中,我传入了String array(我之前在程序中创建了String array,其中包含所有365个String格式的值... [100001,100000,101101,...])。在此方法中,我创建了一个具有6个值的新tally array。我正在尝试编写一个循环,该循环跟踪传入的weather array(365个值),如果在所述索引处出现1,则增加tally array index。最终的tally array看起来像[101、31、3、218、42、101] ...组成用于样本输出的数字。

逻辑给我带来了很多麻烦。假设我已经尽力解释了这一点,那么谁能给我建议。

注意-NUMBER_OF_WEATHER_TYPES的类常量设置为6。

public static int[] getWeatherCounts(String[] weather) {
    int[] tally = new int[6];

    for (int i = 0; i < weather.length; i++) {
        for (int j = 0; j < NUMBER_OF_WEATHER_TYPES; j++) {
            if (weather[j].charAt(j) == 1) {
                tally[j]++;
            }
            return tally;
        }
    }

    return tally;
}


整个程序的上下文:

import java.util.*;
import java.io.*;

public class WeatherInfo {
public static final int DAYS_PER_YEAR = 365;
public static final int NUMBER_OF_WEATHER_TYPES = 6;

public static void main (String[] args) {
    String firstArgs = args[0];
    Scanner input = null;

    if (args.length != 1) {
        System.out.println("Error"); //Look more into this!!!!
    } else {
        try {
            input = new Scanner(new File(firstArgs));

        } catch (FileNotFoundException e) {
            System.out.println("Error: " + e);
            System.exit(1);
        }
    }

    String lineDiscard = input.nextLine();

    double[] highs = new double[DAYS_PER_YEAR];
    double[] lows = new double[DAYS_PER_YEAR];
    String[] weather = new String[DAYS_PER_YEAR];

    for (int i = 0; i < DAYS_PER_YEAR; i++) {
        input.next();
        input.next();
        highs[i] = input.nextDouble();
        lows[i] = input.nextDouble();
        weather[i] = input.next();
    }

    displayWeatherStatistics(highs, lows, weather);

}

public static void displayWeatherStatistics(double[] highs, double[] lows, String[] weather) {
    double highTemp = Integer.MIN_VALUE;
    double lowTemp = Integer.MAX_VALUE;

    // for loop for highs
    for (int i = 0; i < highs.length; i++) {
        if (highs[i] > highTemp) {
            highTemp = highs[i];
        }
    }

    // for loop for lows
    for (int i = 0; i < lows.length; i++) {
        if (lows[i] < lowTemp) {
            lowTemp = lows[i];
        }
    }

    // printouts for the low and high temps of the year...need to fix this a bit
    System.out.println("Highest Temp: " + highTemp + " (F)");
    System.out.println("Lowest  Temp: " + lowTemp + " (F)");

    System.out.println(Arrays.toString(getWeatherCounts(weather)));


}

public static int[] getWeatherCounts(String[] weather) {
    int[] tally = new int[6];


    for (int i = 0; i < weather.length; i++) {
        for (int j = 0; j < NUMBER_OF_WEATHER_TYPES; j++) {
            if (weather[i].charAt(j) == 1) {
                tally[j]++;
            }
             return tally;
        }



    }

     return tally;
}


}

最佳答案

好吧,不看整个程序就很难分辨。但在我看来

if (weather[j].charAt(j) == 1) {
    tally[j]++;
}
return tally;


应该

if (weather[i].charAt(j) == '1') {
    tally[j]++;
}
// omit the return tally, we don't want to do that until the end

10-07 19:52
查看更多