[java] Save file/open file dialog box, using Swing & Netbeans GUI editor

I am a beginner to Java. I am making a simple text editor in netbeans 7(.3) IDE, using its GUI editor. The main problem I face in it is that I can't make it to save/open the file. I have created the "save" button. When I drop the file chooser, it comes as a normal open file dialog box embedded in the java window with no functionality at all. I have also tried creating a new jFileChooser when the save button is clicked (in the Source view), but it doesn't work.

In a nutshell, I need a simple open/save dialog box. When the "Save" button is pressed, the save dialog box opens and saves the file wherever the user chooses with whatever name and .rtf or .txt extension. (P.S.: is it possible to save a file in .docx or .doc in Java?)
When the "Open" btn is pressed, it opens a file in .rtf or .txt (again, is it possible to open .docx or .doc in Java?) through the file chooser.

    private void saveButtonActionPerformed(java.awt.event.ActionEvent evt) {                                           
    JFileChooser saveFile = new JFileChooser();
    if saveFile.showSaveDialog(modalToComponent) == JFileChooser.APPROVE_OPTION {
        File xyz = saveFile.getSelectedFile();
    }
}

Code is here: https://docs.google.com/file/d/0B766zz1iJ1LRN2lGRjNtM29vN2M/edit?usp=sharing

saving in any format is very much possible. Check following- http://docs.oracle.com/javase/tutorial/uiswing/components/filechooser.html

2ndly , What exactly you are expecting the save dialog to work , it works like that, Opening a doc file is very much possible- http://srikanthtechnologies.com/blog/openworddoc.html

Here is an example

private void doOpenFile() {
    int result = myFileChooser.showOpenDialog(this);

    if (result == JFileChooser.APPROVE_OPTION) {
        Path path = myFileChooser.getSelectedFile().toPath();

        try {
            String contentString = "";

            for (String s : Files.readAllLines(path, StandardCharsets.UTF_8)) {
                contentString += s;
            }

            jText.setText(contentString);

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

private void doSaveFile() {
    int result = myFileChooser.showSaveDialog(this);

    if (result == JFileChooser.APPROVE_OPTION) {
        // We'll be making a mytmp.txt file, write in there, then move it to
        // the selected
        // file. This takes care of clearing that file, should there be
        // content in it.
        File targetFile = myFileChooser.getSelectedFile();

        try {
            if (!targetFile.exists()) {
                targetFile.createNewFile();
            }

            FileWriter fw = new FileWriter(targetFile);

            fw.write(jText.getText());
            fw.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

I think you face three problems:

1. understanding the FileChooser
2. writing/reading files
3. understanding extensions and file formats

ad 1. Are you sure you've connected the FileChooser to a correct panel/container? I'd go for a simple tutorial on this matter and see if it works. That's the best way to learn - by making small but large enough steps forward. Breaking down an issue into such parts might be tricky sometimes ;)

ad. 2. After you save or open the file you should have methods to write or read the file. And again there are pretty neat examples on this matter and it's easy to understand topic.

ad. 3. There's a difference between a file having extension and file format. You can change the format of any file to anything you want but that doesn't affect it's contents. It might just render the file unreadable for the application associated with such extension. TXT files are easy - you read what you write. XLS, DOCX etc. require more work and usually framework is the best way to tackle these.