Loads an image from within a jar. - Java 2D Graphics

Java examples for 2D Graphics:Image Load

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Description

Loads an image from within a jar.

Demo Code

/*// www  .j  ava 2  s. c o  m
 * Created on 31-Oct-2004 at 20:29:10.
 * 
 * Copyright (c) 2004-2005 Robert Virkus / Enough Software
 *
 * This file is part of J2ME Polish.
 *
 * J2ME Polish is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * J2ME Polish is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with J2ME Polish; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * Commercial licenses are also available, please
 * refer to the accompanying LICENSE.txt or visit
 * http://www.j2mepolish.org for details.
 */
//package com.java2s;
import java.awt.Image;
import java.awt.Toolkit;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import javax.imageio.ImageIO;

public class Main {
    /**
     * Loads an image from within a jar.
     * 
     * @param fileName the image path. 
     * @return an initialised image-icon or null, when no image could be found.
     */
    public static Image loadIcon(String fileName) {
        URL url = ClassLoader.getSystemResource(fileName);

        if (url == null) {
            System.out.println("unable to locate [" + fileName + "].");
            return null;
        }
        return Toolkit.getDefaultToolkit().createImage(url);
    }

    /**
     * Loads an image from within a jar or from the file system.
     * 
     * @param fileName the image path. 
     * @param packageClass a class within the package where the image can be found
     * @return an initialised image-icon or null, when no image could be found.
     */
    public static Image loadIcon(String fileName, Class packageClass) {
        try {
            ClassLoader classLoader = packageClass.getClassLoader();
            InputStream is = classLoader.getResourceAsStream(fileName);
            if (is == null) {
                File file = new File(fileName);
                if (file.exists()) {
                    is = new FileInputStream(file);
                } else {
                    return null;
                }
            }
            return ImageIO.read(is);
        } catch (IOException e) {
            System.err.println("Unable to load image [" + fileName + "]");
            e.printStackTrace();
            return null;
        }
    }
}

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