Java Applet JFileChooser button issue?

Question

     if ("Analyze Text File".equals(command)) {
    JFileChooser chooser = new JFileChooser();
    chooser.setMultiSelectionEnabled(true);
    if (chooser.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
        File[] files = chooser.getSelectedFiles();
        for (File file : files) {
            try {
                BufferedReader reader = new BufferedReader(new FileReader(file));
                    sb.append(line);
                }
                String text = sb.toString();
                Map<Integer, Integer> counts = getCounts(text)
                HistogramPanel panel = new HistogramPanel(width, counts, height, horizon
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
    }

I am trying to get a JFileChooser to pop up once I click my "Analyze to text" button, which then will allow the user to select a text file which will be processed with my code and output a bar chart.
Everything is working except the button for some reason. If anyone can help it will be appreciated.

    // Object textfile = null; 
  else if("Text".equals(command)) {
    JFileChooser chooser = new JFileChooser();
    FileNameExtensionFilter filter = new FileNameExtensionFilter(
          "txt", "text", "docx");
      chooser.setFileFilter(filter);
 int returnVal = JFileChooser.showOpenDialog(null);
       if (returnVal == JFileChooser.APPROVE_OPTION) {
           File file = JFileChooser.getSelectedFile();
           Map<Integer, Integer> counts = getCounts(Stext);
           int width = counts.size() * BAR
           int horizon = height - 25;
           HistogramPanel panel = new HistogramPanel(width, counts, height, horizon);

       }
   }
   }

Answer 1

"once I click my "Analyze to text" button,"

Could be maybe the actionCommand is not "Text" and you should be checking if "Analyze to text"

if ("Text".equals(command)) { → if ("Analyze to Text".equals(command)) {

// or whatever the text/actionCommand of your button is

Another seemingly obvious problem, is you have declared JFileChooser chooser but you're trying to access filechooser

---

UPDATE

Use this code. Change your button text back. If it doesn't work, then you changed something else in your code, and I can't help, because this works fine for me.

    if ("Analyze Text File".equals(command)) {
        JFileChooser chooser = new JFileChooser();
        int result = chooser.showOpenDialog(null);
        if (result == JFileChooser.APPROVE_OPTION) {
            try {
                File file = chooser.getSelectedFile();
                BufferedReader reader = new BufferedReader(new FileReader(file));
                StringBuilder sb = new StringBuilder();
                String line;
                while ((line = reader.readLine()) != null) {
                    sb.append(line);
                }
                String text = sb.toString();
                Map<Integer, Integer> counts = getCounts(text);
                int width = counts.size() * BAR_WIDTH;
                int max = maxCount(counts);
                int height = max * INCREMENT + 100;
                int horizon = height - 25;
                HistogramPanel panel = new HistogramPanel(width, counts, height, horizon);
                JOptionPane.showMessageDialog(null, panel);
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }