Displays a Swing file selection dialog, and returns the URL of the image selected. - Java Swing

Java examples for Swing:JComponent

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Description

Displays a Swing file selection dialog, and returns the URL of the image selected.

Demo Code


//package com.java2s;

import java.net.*;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileNameExtensionFilter;
import java.awt.*;
import java.io.File;

public class Main {
    private static JFileChooser imageChooser = null;

    /**//from  w  ww.ja v a 2 s. c  om
     * Displays a file selection dialog, and returns the URL of the image selected.
     * Files with extensions "jpg", "jpeg", "png", and "gif" are allowed.
     * This function is not thread safe.
     * @param parent parent component of the dialog, or null.
     * @param currentDirectory starting directory, or null for default.
     * @return the url of the selected image, null if the selection was cancelled or an error occurred.
     */
    public static URL promptImageURL(Component parent, File currentDirectory) {
        if (imageChooser == null) {
            imageChooser = new JFileChooser();
            FileNameExtensionFilter filter = new FileNameExtensionFilter(
                    "Images", "jpg", "jpeg", "png", "gif");
            imageChooser.setFileFilter(filter);
        }

        if (currentDirectory != null) {
            imageChooser.setCurrentDirectory(currentDirectory);
        }

        URL result = null;
        int cValue = imageChooser.showOpenDialog(parent);
        if (cValue == JFileChooser.APPROVE_OPTION) {
            try {
                result = imageChooser.getSelectedFile().toURI().toURL();
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
        return result;
    }
}

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