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apurva234

Tue Jun 14, 2011 6:22 pm


Converting an array to a new Array.

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Hello, 
  I have a been given an assignment where id have to read in a text file into an array, and format the text file and print it out. In my case, the file contains names of the students of our class, so i swapped the lastname with the first name to show the firstname before the lastname. (Sorry its a bit confusing). Here is the code:
import java.io.*;
public class FirstName_LastName
{

    public static void main (String[] args) throws IOException
    { //main method

/* Class used for reading data from files, allowing for an InputStreamReader to be
   constructed on a FileInputStream. */     
        FileReader file = new FileReader ("LastNameList.txt");
        BufferedReader input = new BufferedReader (file);

        final int Stnames = 28; 
        String name[] = new String [Stnames];
        
        

        for (int i = 0 ; i < name.length ; i++)
        {//start of i for
        //Reads in data from file into "name" array.
            name [i] = (input.readLine ());
            for (int j = 0 ; j < name [i].length () ; j++)
            {//start of j for
                if (name [i].charAt (j) == ',')
                {//start of if
                // int j is used to track the comma within the name.
                    int LName = j;
                    int FName = j + 2; // First name is printed after the comma and space.
                    for (int k = FName ; k < name [i].length();k++)
                    {//start of k for
                        System.out.print (name [i].charAt (k));
                    } //end of if                   
                    System.out.print (", ");
                    for (int l = 0 ; l < LName ; l++)
                    {//start of l for
                   
                    System.out.print (name [i].charAt (l));
                       
                       
                    }
                }
            }
        System.out.println (); // ensures the proper displayment of names. 
        }
    }
  }//main method 

what i want to know is, how would i convert the name[i].charAt (l)); to a brand new array so i can store the final output so i can bubble sort?
and by the way, i'm a beginner to java so please be kind as to what some of the comments may be. :D


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ProgrammingFun

Tue Jun 14, 2011 6:58 pm


Re: Converting an array to a new Array.

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Please use the syntax tags to post your code:

   import java.io.*; 
   public class FirstName_LastName 
   { 
   
      public static void main (String

I do not completely understand your question.
If you want to store the first names and last names in two different arrays, you can create a two dimensional array:

String name
...which would give you two levels to each row:

name

Using this, you can then read the first name and last name into the 2D array:

String reading = input.readLine();
name 

After this, you can just output the array:

for (int c=0; c < varname; c++)
{
    for (int d=0; d < 2; d++)
    {
        System.out.print (name


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apurva234

Tue Jun 14, 2011 7:36 pm


RE:Converting an array to a new Array.

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Thank You, it helped.


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ProgrammingFun

Tue Jun 14, 2011 7:59 pm


Re: RE:Converting an array to a new Array.

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Thank You, it helped.
You're welcome

However, I was wrong here:


...which would give you two levels to each row:

name


It should actually be:

name