java swing two buttons communication

Question

In my swing application, I need to choose a file.and then compile that file in a terminal.But before compiling, I want to delete if other files are present in the directory of chosen file. I have the file path but I need the parent folder path, to check other files.

load.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
        JFileChooser j = new JFileChooser(FileSystemView.getFileSystemView().getHomeDirectory()); 
        int r = j.showSaveDialog(null); 
        if (r == JFileChooser.APPROVE_OPTION) { 
            l.setText("File Ready"); 
            File selectedFile = j.getSelectedFile(); 
            path=selectedFile.getAbsolutePath(); 
        } else 
            l.setText("the user cancelled the operation"); 
    } 
}); 
compile.addActionListener(new ActionListener() { 
    public void actionPerformed(ActionEvent e) { 
        Runtime rt = Runtime.getRuntime(); 
        Process proc = null; 
        BufferedReader stdInput = new BufferedReader(new InputStreamReader(proc.getInputStream())); 
        BufferedReader stdError = new BufferedReader(new InputStreamReader(proc.getErrorStream())); 
        String s = null; 
        StringBuilder builder = new StringBuilder(); 
        File folder = new File(path); 
       for (File f : folder.listFiles()) {
                if (f.getName().endsWith(".txt")) {
                    f.delete(); 
    }
});

Answer 1

Well there is a mistake you are doing in this part

 File folder = new File(path); 
       for (File f : folder.listFiles()) {
                if (f.getName().endsWith(".txt")) {
                    f.delete(); 

The line File folder = new File(path); will give the file reference not folder reference So if you list other files in the path, there will be nothing.

Change it to File folder = new File(path).getParentFile(); You have the parent folder. Now list and delete needed files.

Hope this helps!