Java Image findImagefromClasspath(Class relToThisClass, String relImageName)

Description

find Imagefrom Classpath

License

Open Source License

Declaration

private static Image findImagefromClasspath(Class relToThisClass, String relImageName)

Method Source Code

//package com.java2s;
/*************************************************************************
    //from ww w .j ava  2s.  c o m
Copyright (C) 2009 Grandite
    
This file is part of Open ModelSphere.
    
Open ModelSphere 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 3 of the License, or
(at your option) any later version.
    
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
or see http://www.gnu.org/licenses/.
    
You can redistribute and/or modify this particular file even under the
terms of the GNU Lesser General Public License (LGPL) as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
    
You should have received a copy of the GNU Lesser General Public License 
(LGPL) along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
or see http://www.gnu.org/licenses/.
    
You can reach Grandite at: 
    
20-1220 Lebourgneuf Blvd.
Quebec, QC
Canada  G2K 2G4
    
or
    
open-modelsphere@grandite.com
    
 **********************************************************************/

import java.awt.*;

import java.io.*;

import java.util.StringTokenizer;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import javax.swing.ImageIcon;

public class Main {
    private static final String CLASSPATH = "java.class.path";

    private static Image findImagefromClasspath(Class relToThisClass, String relImageName) {
        Image image = null;

        String name = relToThisClass.getName();
        String path = name.substring(0, name.lastIndexOf('.'));
        path = path.replace('.', '/');
        path = path + relImageName.substring(1); //remove the '.' of the relative path 

        String classpath = System.getProperty(CLASSPATH);
        StringTokenizer st = new StringTokenizer(classpath, ";:");
        while (st.hasMoreTokens()) {
            String token = st.nextToken();
            try {
                ZipFile file = new ZipFile(token);
                ZipEntry entry = file.getEntry(path);
                if (entry != null) {
                    InputStream input = file.getInputStream(entry);
                    int size = (int) entry.getSize();
                    byte[] data = getImageFromStream(input, size);
                    ImageIcon icon = new ImageIcon(data);
                    image = icon.getImage();
                    break;
                } //end if

            } catch (IOException ex) {
                //ignore, and continue the iterations
            } //end try
        } //end while
        return image;
    }

    private static byte[] getImageFromStream(InputStream input, int size) {
        byte[] image = new byte[size];

        try {
            int read = input.read(image, 0, size);
        } catch (IOException ex) {
            image = null;
        }

        return image;

    }
}

Java Image findImagefromClasspath(Class relToThisClass, String relImageName)

Description

License

Declaration

Method Source Code

Related