How to use Open File Dialog and Save File Dialog - Java Swing

JFileChooser object allow you create Open File Dialog or Save File Dialog in Java. It's really powerful. Today, I will show you how to do that. I will create a swing application project for demonstration

1/ OpenFileDialog

public void mouseClicked(MouseEvent e) {
 JFileChooser fc = new JFileChooser();
 int rv = fc.showOpenDialog(null);
 if (rv == JFileChooser.APPROVE_OPTION) {
  File file = fc.getSelectedFile();
  String filePath = file.getAbsolutePath();
 }
}

filePath is the file you want to process.


2/ SaveFileDialog

public void mouseClicked(MouseEvent e) {
 JFileChooser fileChooser = new JFileChooser();
 FileFilter filter = new FileFilter() {
  @Override
  public String getDescription() {
   // TODO Auto-generated method stub
   return "XML File | *.xml"; //Sample for file description
  }
  
  @Override
  public boolean accept(File f) {
   // TODO Auto-generated method stub
   if(f.isDirectory()) {
    return true; // show directories
   }
   return f.getName().contains("xml"); // Just show XML file only.
  }
 };
 fileChooser.setFileFilter(filter);
 fileChooser.setDialogTitle("Specify a file to save");
 int userSelection = fileChooser.showSaveDialog(null);
  
 if (userSelection == JFileChooser.APPROVE_OPTION) {
  File fileToSave = fileChooser.getSelectedFile();
  String filePath = fileToSave.getAbsolutePath();
 }
}