Converting an array to a new Array.

[apurva234]

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.

[ProgrammingFun]

Please use the syntax tags to post your code:

Java:

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

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:

Java:

String name[][] = new String [Stnames][Stnames];

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

Java:

name[0] and name[1]

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

Java:

String reading = input.readLine(); name [i] = reading.split(","); //then, name[0] = lastname and name[1] = firstname

After this, you can just output the array:

Java:

for (int c=0; c < varname; c++) {     for (int d=0; d < 2; d++)     {         System.out.print (name[c][d] + " ");     }     System.out.println (); }

[apurva234]

Thank You, it helped.

[ProgrammingFun]

apurva234 @ Tue Jun 14, 2011 7:36 pm wrote:

Thank You, it helped.

You're welcome

However, I was wrong here:

ProgrammingFun wrote:

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

Java:

name[0] and name[1]

It should actually be:

Java:

name[i][0] and name[i][1] with i being your for variable