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Thread: Create Multiple Arrays from a text file

  1. #1
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    Default Create Multiple Arrays from a text file

    Hi,

    I am having trouble creating multiple arrays from each line in a text file. This is my text file:

    2 8 8
    3 6 9
    3 1 7

    I am able to read this file in, create tokens and print all the values. My goal now is to create 3 arrays from this file. Array1 = [2, 8, 8], Array2 = [3, 6, 9], and Array3 = [3, 1, 7]

    This is my code so far. Please let me know if you can help or direct me to a good link online.

    Thanks, Chris


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

    public class Project1 {

    public static void createArrays(){
    int[] nums = null;
    try {
    File file1 = new File("file1.txt");
    FileReader fileReader = new FileReader(file1);
    BufferedReader reader = new BufferedReader(fileReader);
    String line = null;
    while ((line = reader.readLine()) != null){
    System.out.println(line);
    StringTokenizer st = new StringTokenizer (line);
    while (st.hasMoreTokens()){
    String token = st.nextToken();
    }

    }
    } catch (Exception ex) {
    ex.printStackTrace();
    }

    }

    public static void main(String [] args){
    createArrays();
    }
    }


  2. #2
    Member DanBrown's Avatar
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    Thumbs up Re: Create Multiple Arrays from a text file

    import java.io.*;
    import java.util.StringTokenizer;
     
    public class Project1 {
     
    public static void createArrays(){
    int[] nums = null;
     
    try {
    File file1 = new File("file1.txt");
    FileReader fileReader = new FileReader(file1);
    BufferedReader reader = new BufferedReader(fileReader);
    String line = null;
     
    while ((line = reader.readLine()) != null){
     
    	StringTokenizer st = new StringTokenizer (line);
     
    	nums = new int[st.countTokens()];
     
    	//System.out.println(line);
     
    	int i=0;
    		while (st.hasMoreTokens()){
    			String token = st.nextToken();
    			nums[i] = Integer.parseInt(token);
    			i++;
    		}
    		System.out.print("[");
    		for(int j=0;j<i;j++){
    			System.out.print(" "+nums[j]+" ");
    		}
    		System.out.println("]");
     
    }
    } catch (Exception ex) {
    ex.printStackTrace();
    }
     
    }
     
    public static void main(String [] args){
    createArrays();
    }
    }

    i feel this code will help you to move further.
    Thanks and Regards
    Dan Brown

    Common Java Mistakes

  3. The Following User Says Thank You to DanBrown For This Useful Post:

    chris11kgf (February 11th, 2011)

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