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Thread: Read CSV files and organising the data in Java

  1. #1
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    Default Read CSV files and organising the data in Java

    Hi, I was wondering anyone one can help me please?

    I am trying to write a program that read from a csv file called matches.csv.
    A single football match can end with a win or a draw: in first case the winner team get 3 points and the loser none, in the second case of draw each of the two teams get 1 point.

    For example, the first line of the file matches.txt is as follow:

    In the file it contains the following data.

    17/08/2013 Arsenal Aston Villa 1 3
    24/08/2013 Aston Villa Liverpool 0 1




    This means that a match has been played on the 17/08/2013 where Arsenal scored 1 goal while Aston Villa 3 goals: thus Arsenal got 0 points while Aston Villa 3 points.


    How can I structure my output to make it make it read

    Position Team Played Points
    1 Aston Villa 2 3
    2 Liverpool 1 3
    3 Arsenal 1 0

    import java.io.File;
    import java.io.FileNotFoundException;
    import java.util.Scanner;
     
    public class Teams 
    {
     
    	public static void main(String[] args)
    	{
    		String fileName = "matches.csv";
    		File file = new File(fileName);
     
    		try
    		{
    			Scanner inputStream = new Scanner(file);
    			while (inputStream.hasNext())
    			{
    				String data = inputStream.next();
    				System.out.println(data);
    			}
    		}	
    		catch(FileNotFoundException e)
    		{
    			e.printStackTrace();
    		}
     
       }
     
    }


  2. #2
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    Default Re: Read CSV files and organising the data in Java

    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
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    Default Re: Read CSV files and organising the data in Java

    Can anyone help me please? The CSV file contains
    17/08/2013 Arsenal Aston Villa 1 3
    24/08/2013 Aston Villa Liverpool 0 1

    In java eclipse how do I use read the file and arrange it so the output will be look this:
    Position Team Played Points
    1 Aston Villa 2 3
    2 Liverpool 1 3
    3 Arsenal 1 0

  4. #4
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    Default Re: Read CSV files and organising the data in Java

    Divide the program up into several steps.
    Start by reading the file into Strings
    and parsing the Strings into the parts with the different values.
    Make a list of the teams.
    Build the totals
    Sort the list by the totals
    print out the list
    If you don't understand my answer, don't ignore it, ask a question.

  5. #5
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    Default Re: Read CSV files and organising the data in Java

    how do i parse the strings into the parts?

  6. #6
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    Default Re: Read CSV files and organising the data in Java

    The String class's split() method would be good with a CSV file.
    If you don't understand my answer, don't ignore it, ask a question.

  7. #7
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    Default Re: Read CSV files and organising the data in Java

    by the way is this code correct for reading the csv file in string?

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

    public class Teams
    {

    public static void main(String[] args)
    {
    String fileName = "matches.csv";
    File file = new File(fileName);

    try
    {
    Scanner inputStream = new Scanner(file);
    while (inputStream.hasNext())
    {
    String data = inputStream.next();
    System.out.println(data);
    }
    }
    catch(FileNotFoundException e)
    {
    e.printStackTrace();
    }

    }

    }

  8. #8
    Super Moderator Norm's Avatar
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    Default Re: Read CSV files and organising the data in Java

    What happens when it is executed? The output will show you.
    I'd read the file line by line and split the line into parts vs token by token.

    Please edit your post and wrap your code with code tags:
    [code=java]
    YOUR CODE HERE
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  9. #9
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    Default Re: Read CSV files and organising the data in Java

    When i code run the output displays the data from the csv file.
    But now how do I include the String class's split()?

    import java.io.File;
    import java.io.FileNotFoundException;
    import java.util.Scanner;
     
    public class Teams
    {
     
    public static void main(String[] args)
    {
    String fileName = "matches.csv";
    File file = new File(fileName);
     
    try
    {
    Scanner inputStream = new Scanner(file);
    while (inputStream.hasNext())
    {
    String data = inputStream.next();
    System.out.println(data);
    }
    }
    catch(FileNotFoundException e)
    {
    e.printStackTrace();
    }
     
    }
     
    }

  10. #10
    Super Moderator Norm's Avatar
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    Default Re: Read CSV files and organising the data in Java

    how do I include the String class's split()?
    After the code has read a line of text from the file into a String,
    use the split() method to separate the tokens on that line into elements in an array.

    The code should use the nextLine() method to read a line from the file, not the next() method.
    If you don't understand my answer, don't ignore it, ask a question.

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