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Thread: Help reading in data

  1. #1
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    Default Help reading in data

    Hello i'm working on this program and at the beginning steps i'm just having an issue with reading data from a .txt file this is what i have so far.

    Here is the data file.

    200 1000 800
    450 845 1200
    800 250 400
    0 1500 1800
    600 500 1000
    700 1400 1700
    675 400 900

    Here is the code


    import java.util.*;
    import java.io.*;
     
    public class lab1 {
     
    	/** 
    	 *  MW 1:30 - 2:50 
    	 *  This program will read file from data and make 3 arrays that will contain
    	 *  information about the daily in take of calories for breakfast, lunch and dinner
    	 *  then compute total calories per day, average consumed each day, average calories
    	 *  consumed in each of the three meals, the max numbers of calories consumed in any specific
    	 *  day, and the max number of calories consumed in any one meal of any type.
    	 * @throws FileNotFoundException 
    	 */
     
    	public static void main(String[] args) throws FileNotFoundException 
    	{
    		File file = new File ("C:\\Users\\jfangulo\\workspace\\Lab1\\src\\data.txt");
    		Scanner in = new Scanner (file);
    		int [] breakfast = new int [7];
    		int [] lunch = new int [7]; 
    		int [] dinner = new int [7];
    		int counter = 0;
     
    		if (!(file.exists()))
    			System.out.println("No file found");
     
    		while (in.hasNext());
    		{
    			breakfast [counter] = in.nextInt();
    			lunch [counter] = in.nextInt();
    			dinner [counter] = in.nextInt();
    			counter++;
    		}
    		System.out.println(breakfast[0]);
    		System.out.println(lunch[0]);
    		System.out.println(dinner[0]);
     
    	}
     
    }

    The code just hangs. i changed the path name to File file = new File ("data.txt");
    and that didn't do anything but hang either.

    Any help is appreciated Thanks!


  2. #2
    Administrator copeg's Avatar
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    Default Re: Help reading in data

    The code just hangs
    Add some System.out.println statements in there...this will let you and us know where exactly the code 'hangs'.

  3. #3
    Super Moderator Norm's Avatar
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    Default Re: Help reading in data

    You have three nextInt calls for one hasNext call.

  4. #4
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    Default Re: Help reading in data

    while (in.hasNext());
    {
    Hmmmm.
    Improving the world one idiot at a time!

  5. #5
    Super Moderator Norm's Avatar
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    Default Re: Help reading in data

    AHHH The famous forever loop.

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