Java JFileChooser chooseSaveFile(String dir, String initialFile, String fileNameExtension, Component parent)

Description

Opens a file chooser and let the user to either choose or specify a file for saving purpose.

License

Open Source License

Parameter

Parameter	Description
dir	The directory which the file chooser works from initially.
initialFile	The file that is set initially.
fileNameExtension	The desired file extension.
parent	The parent component that wants to open the file chooser.

Return

The specified the file, null if canceled.

Declaration

public static File chooseSaveFile(String dir, String initialFile, String fileNameExtension, Component parent) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.awt.Component;

import java.io.File;

import javax.swing.JFileChooser;

import javax.swing.JOptionPane;

import javax.swing.filechooser.FileNameExtensionFilter;

public class Main {
    /**/*  ww w .j ava 2  s.  c  o m*/
     * Opens a file chooser and let the user to either choose or specify a file for saving purpose.
     * 
     * @param dir            The directory which the file chooser works from initially.
     * @param initialFile      The file that is set initially.
     * @param fileNameExtension   The desired file extension.
     * @param parent The parent component that wants to open the file chooser.
     * 
     * @return   The specified the file, <code>null</code> if canceled.
     */
    public static File chooseSaveFile(String dir, String initialFile, String fileNameExtension, Component parent) {
        JFileChooser chooser = new JFileChooser();
        File selectedFile = null;
        String selectedFileName = null;

        File fileDir = null;

        // if dir is not specified or the dir doesn't exist, use the current directory
        if (dir == null) {
            fileDir = new File(".");
        } else {
            fileDir = new File(dir);
        }

        if (!fileDir.exists()) {
            fileDir = new File(".");
        }

        chooser.setCurrentDirectory(fileDir);

        if (initialFile != null) {
            chooser.setSelectedFile(new java.io.File(initialFile));
        }
        if (fileNameExtension != null) {
            chooser.setFileFilter(new FileNameExtensionFilter(fileNameExtension + " file", fileNameExtension));
        }
        chooser.setDialogTitle("Save File");
        boolean isValid = true;
        do {
            int chooserState = chooser.showDialog(parent, "Ok");
            if (chooserState == JFileChooser.APPROVE_OPTION) {
                selectedFile = chooser.getSelectedFile();
                selectedFileName = selectedFile.getName();
                if (fileNameExtension != null) {
                    // 1.append the specified file extension if there is no extension.
                    // 2.append the desired extension if there is an extension which is not the same as specified
                    if (selectedFileName.indexOf('.') == -1 || (selectedFileName.indexOf('.') != -1
                            && !selectedFileName.endsWith(fileNameExtension))) {
                        selectedFileName += "." + fileNameExtension;
                    }
                    selectedFile = new File(selectedFile.getParentFile(), selectedFileName);
                }
                if (selectedFile.exists()) {
                    int choice = JOptionPane.showConfirmDialog(parent,
                            selectedFileName + " already exists. Overwrite it?", "Overwrite File",
                            JOptionPane.YES_NO_OPTION);
                    // If "Yes" is selected
                    if (choice == JOptionPane.YES_OPTION) {
                        isValid = false;
                    }
                } else {
                    isValid = false;
                }
            } else {
                return null;
            }
        } while (isValid);

        return selectedFile;
    }
}

Related

1. chooseFilesForOpen(String title, FileFilter filter, File initialDir)
2. chooseFileToRead(Component owner, FileFilter filter, File pathToNavigateTo)
3. chooseNewFile(final Component parent, final File startingDirectory)
4. chooseOpenFile(String dir, String fileName, String fileNameExtension, Component parent)
5. chooseSaveFile(Component parent, File defaultFile, FileFilter filter)
6. choseFile(File selectedFile, String startDir, final String description, final String extension, Component parent, boolean addExtension, boolean forLoad)
7. cleanFileSelector(JFileChooser filterUpdates)
8. cleanFileSelector(JFileChooser filterUpdates)
9. configureFileChooser(JFileChooser fchooser, boolean directoryOnly, File selectedFile)