graphical ls

Hi everyone! I am writing what is write now a graphical linux ls program that I am going to use for another program. The code I have put together should work, but for some reason doesn't. Thanks in advance for your help.

Code:

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import java.awt.*;
import javax.swing.*;
import java.io.*;

public class DTSTestAnalyzer
{
    public DTSTestAnalyzer()
    {
        createWindow();
    }
   
    public static void main(String[] args)
    {
        DTSTestAnalyzer dtsTestAnalyzer = new DTSTestAnalyzer();
    }
   
    public void createWindow()
    {
        JFrame frame = new JFrame("A+ Test Analyzer");
        int counter;
       
        counter = 0;
       
        while(counter <= 1)
        {
            JLabel textLabel = new JLabel("PLEASE PICK A COMPANY",SwingConstants.CENTER);
            File dir = new File("~/Desktop/DTSTestAnalyzer/A+TestAnalyzer");
            String line = "";
           
            File[] subDirs = dir.listFiles(new FileFilter()
            {
                public boolean accept(File pathname)
                {
                    return pathname.isDirectory();
                }
            });
           
            for (File subDir : subDirs)
            {
                line = line + subDir.getPath();
            }
           
            TextArea textArea = new TextArea(line,10,20);
           
            frame.getContentPane().add(textLabel, BorderLayout.CENTER);
            frame.add(textArea);
        }

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.pack();
        frame.setSize(300, 300);
        frame.setVisible(true);
    }
}

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Quote:

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should work, but for some reason doesn't

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That means nothing to us. What does't work about it? Runtime Errors? Compile time errors? Stack trace? what?