java code that i am unable to rectify
<p>I wrote this java code for a project I am working on. I have gone as far as I can, but still can't get it to work, so I thought I would try here.</p>

<p>The program is supposed to use a <code>JOptionPane</code> to ask the user what to city's he would like to see the mileage distance between. Those numbers come from a .txt file.</p>

<p>I always get an error that "j" cant be found.</p>

<pre><code>import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;
import javax.swing.JOptionPane;

public class Mileage
{
    public static void main(String[] paramArrayOfString)
    throws IOException
    {
        String str3 = "";

        Scanner localScanner = new Scanner(new File(JOptionPane.showInputDialog("Enter the name of the data file.")));

        String str1 = localScanner.nextLine() + " Cities:\n\n";

        int i = localScanner.nextInt();

        ArrayList localArrayList = new ArrayList(i);

        int[][] arrayOfInt = new int[i][i];
        for (int j = 0; j &lt; i; j++)
        {
            localScanner.nextLine();
            localArrayList.add(localScanner.nextLine());
            for (int k = 0; k &lt; i; k++) 
            {

                arrayOfInt[j][k] = localScanner.nextInt();
            }
        }
        j = 1 ;
        for (String str4 : localArrayList)
        {
            str1 = str1 + j++ + ". " + str4 + "\n"; str1 = str1 + "\nEnter from and to cities for mileage, \"Quit\" or \"quit\" to quit.";
            String str2;
        }
        do 
        {
            str2 = JOptionPane.showInputDialog(str3 + str1);
            if (str2.equalsIgnoreCase("quit"))
            {
                continue;
            }
            localScanner = new Scanner(str2);
            int m = localScanner.nextInt();
            int n = localScanner.nextInt();
            if ((m &lt; 1) || (m &gt; i) || (n &lt; 1) || (n &gt; i))
                str3 = "Invalid values, try again.\n\n";
            else {
                str3 = "The distance between " + (String)localArrayList.get(m - 1) + " and " + (String)localArrayList.get(n - 1) + " is " + arrayOfInt[(m - 1)][(n - 1)] + " miles.\n\n";
            }
        }

        while (!str2.equalsIgnoreCase("quit"));
    }
}
</code></pre>

<p>and here is another form I tried, little is different, but both have same error:</p>

<pre><code>import java.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Scanner;
import javax.swing.JOptionPane;

public class MileageTest
{
    public static void main(String[] paramArrayOfString)
    throws IOException
    {
        String str5 = "";

        String str1 = JOptionPane.showInputDialog("Enter the name of the data file.");
        Scanner localScanner = new Scanner(new File(str1));

        String str2 = localScanner.nextLine();

        int i = localScanner.nextInt();

        ArrayList localArrayList = new ArrayList(i);

        int[][] arrayOfInt = new int[i][i];
        for (int j = 0; j &lt; i; j++)
        {
            localScanner.nextLine();
            localArrayList.add(localScanner.nextLine());
            for (int k = 0; k &lt; i; k++) 
            {
                arrayOfInt[j][k] = localScanner.nextInt();
            }
        }
        String str3 = str2 + " Cities:\n\n";
        j = 1;
        for (String str6 : localArrayList)
            str3 = str3 + j++ + ". " + str6 + "\n"; 
            str3 = str3 + "\nEnter from and to cities for mileage, \"Quit\" or \"quit\" to quit.";
            String str4;
        do {
            str4 = JOptionPane.showInputDialog(str5 + str3);
            if (str4.equalsIgnoreCase("quit"))
                continue;
            localScanner = new Scanner(str4);
            int m = localScanner.nextInt();
            int n = localScanner.nextInt();
            if ((m &lt; 1) || (m &gt; i) || (n &lt; 1) || (n &gt; i))
                str5 = "Invalid values, try again.\n\n";
            else 
            {
                str5 = "The distance between " + (String)localArrayList.get(m - 1) + " and " + (String)localArrayList.get(n - 1) + " is " + arrayOfInt[(m - 1)][(n - 1)] + " miles.\n\n";
            }
        }

        while (!str4.equalsIgnoreCase("quit"));
        test();
    }

   private static void test()
   {
        System.out.println("Testing...");
   }
}
</code></pre>
