将参差不齐的文件读入二维数组 - 打印 - 并找到列的平均值

Question

我在读取整个文件并将其放入数组时遇到问题。它一直遗漏我的 txt 文件中的最后 2 个数字。我在导致此问题的 createArr() 方法中做错了什么。此外，我的方法 avgTimeTemp() 除了第一行之外没有产生任何输出。我在下面包含了我的文本文件内容并输出。

文本文件内容

98 95 95 102

99 96

99.5 97

100 97.5 97.5

101 98.5 98 101 100 102.5

99.5

99.5 95 96.5 102 97.5

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Temperature2 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        try {
            //create scanner and read file
            File input = new File("lab2input2.txt");
            Scanner klg = new Scanner(input);

            //Variable declarations
            double [][] arr = new double [7][];

            System.out.println("Hello! Thank you for saving lives! ");
            System.out.println(" ");
            System.out.println("Please fill in the data for your patient:");
            System.out.println("Patient Name:");
            System.out.println("Date(Reporting week): ");
            System.out.println(" ");
            System.out.println("This Weeks temperature data is incomplete and fragmented... but thats ok! We still have your averages:  ");
            System.out.println("Your Patients Weekly Temperature Record for Time Classes T1 - T6 are as follows:");
            System.out.println("     NOTE: Week starts MONDAY(Day1) and ends SUNDAY(Day7)");
            System.out.println(" ");


            //Method Calls
            createArr(klg, arr);
            printArr(arr);
            avgDailyTemp(arr);
            avgTimeTemp(arr);

            klg.close();
        }   //End of Try
        catch (FileNotFoundException e) {
            System.out.println("The file was not found."); 
        }   
    }   //End of Main

    public static void createArr(Scanner klg, double [][] arr) {
        int i, j;

        for(i = 0; i < arr.length; i++) {
            if(arr.length != 7 && arr != null){
                System.out.print("There is not data for 7 days in the file you inputed. Please check file contents.");  
            }
            arr[i] = new double[i]; //I Feel I have a problem in this line
            for(j = 0; j< arr[i].length; j++) {
                arr[i][j] = klg.nextDouble();
            }
        }
    }
    //Print array (TESTING PURPOSES)
    public static void printArr(double [][] arr) {
        System.out.println("The file contains the following input values: ");       
        for (int i = 0; i< arr.length; i++){
            for(int j = 0; j < arr[i].length; j++) {
                System.out.println(arr[i][j] + " ");    
            }
        }
    }
    //The average temperature of a patient each day from Monday to Sunday
    public static void avgDailyTemp(double [][] arr) {
        double sum, avg;
        System.out.println("Average temperature each day this week: ");
        for(int i = 0; i < arr.length; i++) {
            sum = 0;
            for(int j = 0; j<arr[i].length; j++){
                sum = sum + arr[i][j];
            }
            avg = sum/6;
            System.out.println("Day " + (i+1) + " " + avg);
        }
        System.out.println(" ");
    }
    //NOT WORKING - The average temperature of patient at Time Classes T1-T6
    public static void avgTimeTemp(double [][] arr) {
        double sum; 
        System.out.println("Average temperature for each Time Class: ");

        for (int j = 0; j < arr[j].length; j++){
            double [] avgArr = new double [j];
            sum = 0; 
            for (int i = 0; i < arr.length; i++){ 
                sum = sum + arr[i][j];
            }
            avgArr[j] =sum/7;
            System.out.println("Time Class T" + (j+1) + ": " + avgArr[j]);
        }
        System.out.println(" ");
    }
}   //End of Class

输出：

Hello! Thank you for saving lives! 

Please fill in the data for your patient:
Patient Name:
Date(Reporting week): 

This Weeks temperature data is incomplete and fragmented... but thats ok! We still have your averages:  
Your Patients Weekly Temperature Record for Time Classes T1 - T6 are as follows:
     NOTE: Week starts MONDAY(Day1) and ends SUNDAY(Day7)

The file contains the following input values: 

98.0 

95.0 

95.0 

102.0 

99.0 

96.0 

99.5 

97.0 

100.0 

97.5 

97.5 

101.0 

98.5 

98.0 

101.0 

100.0 

102.5 

99.5 

99.5 

95.0 

96.5 

Average temperature each day this week: 

Day 1 0.0

Day 2 16.333333333333332

Day 3 31.666666666666668

Day 4 49.5

Day 5 65.66666666666667

Day 6 82.66666666666667

Day 7 98.83333333333333

Average temperature for each Time Class:

Answer 1

尝试

public static void createArr(Scanner klg, double [][] arr) {

    int i = 0;


    while (klg.hasNextLine()) {


        String line = klg.nextLine();
        String [] vals = line.split(" "); 

        arr[i] = new double [vals.length];
        int j = 0;

        for (String val : vals) {
            arr[i][j++] = Double.parseDouble(val);
        }

        i++;
    }

}

将参差不齐的文件读入二维数组 - 打印 - 并找到列的平均值

Reading ragged file into a 2d array - print - and find average of columns

java

arrays

file

ragged