How to save file using JFileChooser?

Lokesh Kumar picture Lokesh Kumar · Mar 27, 2010 · Viewed 49.1k times · Source

I have a method in my application called "Save as" which Saves the image of my application on computer my into a file. I used the JFileChooser to let the users choose their desired location for saving the file. The problem is unless user explicitly types in the file format, it saves the file with no extension. How can I have formats like jpg, png in the File Type drop down menu.

and, how can i get extension from the File Type drop menu for saving my image file.

 ImageIO.write(image,extension,file);

Answer

Lokesh Kumar picture Lokesh Kumar · Mar 28, 2010

Finally, I solved my own problem:

JFileChooser fc = new JFileChooser("C:/");
fc.addChoosableFileFilter(new JPGSaveFilter());
fc.addChoosableFileFilter(new JPEGSaveFilter());
fc.addChoosableFileFilter(new PNGSaveFilter());
fc.addChoosableFileFilter(new GIFSaveFilter());
fc.addChoosableFileFilter(new BMPSaveFilter());
fc.addChoosableFileFilter(new WBMPSaveFilter()); 

int retrieval = fc.showSaveDialog(null);

if (retrieval == JFileChooser.APPROVE_OPTION) {
  String ext = "";

  String extension = fc.getFileFilter().getDescription();

  if (extension.equals("*.jpg,*.JPG")) {
    ext = ".jpg";
  } else if (extension.equals("*.png,*.PNG")) {
    ext = ".png";
  } else if (extension.equals("*.gif,*.GIF")) {
    ext = ".gif";
  } else if (extension.equals("*.wbmp,*.WBMP")) {
    ext = ".wbmp";
  } else if (extension.equals("*.jpeg,*.JPEG")) {
    ext = ".jpeg";
  } else if (extension.equals("*.bmp,*.BMP")) {
    ext = ".bmp";
  }
}

Example Filter:

package example

import java.io.File;
import javax.swing.filechooser.FileFilter;

class JPGSaveFilter extends FileFilter {
  @Override
  public boolean accept(File f) {
    if (f.isDirectory()) {
      return false;
    }

    String s = f.getName().toLowerCase();

    return s.endsWith(".jpg");
  }

  @Override
  public String getDescription() {
    return "*.jpg,*.JPG";
  }
}