Java Swing Icon getScaledIcon(String resourceName, int width, int height)

Description

Used to get an icon with specified width and height.

License

Open Source License

Parameter

Parameter	Description
resourceName	Name of resource where icon is stored.
width	Width for the returned icon.
height	Height for the returned icon.

Return

The created and scaled icon or null if resource is not available.

Declaration

public static ImageIcon getScaledIcon(String resourceName, int width, int height) 

Method Source Code

//package com.java2s;
/*//  w  w  w  . j a  v a  2 s. c om
 *   Swing Explorer. Tool for developers exploring Java/Swing-based application internals. 
 *     Copyright (C) 2012, Maxim Zakharenkov
 *
 *   This library is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU Lesser General Public
 *   License as published by the Free Software Foundation; either
 *   version 2.1 of the License, or (at your option) any later version.
 *
 *   This library 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
 *   Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *   
 */

import java.awt.Image;

import java.awt.Toolkit;

import java.net.URL;

import javax.swing.ImageIcon;

public class Main {
    /**
     * Used to get an icon with specified width and height. If the width or
     * height are less or equal with 0 icon will not be scaled.
     * @param resourceName Name of resource where icon is stored.
     * @param width Width for the returned icon.
     * @param height Height for the returned icon.
     * @return The created and scaled icon or <code>null</code> if resource
     * is not available.
     */
    public static ImageIcon getScaledIcon(String resourceName, int width, int height) {
        ImageIcon result = getImageIcon(resourceName);
        if (result != null) {
            if (width > 0 && height > 0) {
                Image artImage = result.getImage().getScaledInstance(width, height, Image.SCALE_SMOOTH);
                result.setImage(artImage);
            }
        }
        return result;
    }

    /**
     * Used to get instance of <i>ImageIcon</i> object. Invoke
     * {@link #getImageIcon(Class, String)} method with <code>null</code> class.
     * @param resourceName Name of the resource where image stored.
     * @return Instance of <i>ImageIcon</i> object or <code>null</code> if
     * resource is not found.
     */
    public static ImageIcon getImageIcon(String resourceName) {
        return getImageIcon(null, resourceName);
    }

    /**
     * Used to get instance of <i>ImageIcon</i> object. Specified class or
     * <i>ClassLoader</i> if class is null are used to get access to the
     * resource where image is stored.
     * @param _class Class used to get the image resource.
     * May be <code>null</code>.
     * @param resourceName Name of the resource where image is stored.
     * @return Instance of <i>Image</i> object or <code>null</code> if
     * resource is not found.
     */
    public static ImageIcon getImageIcon(Class<?> _class, String resourceName) {
        Image image = getImage(_class, resourceName);
        if (image != null) {
            return new ImageIcon(image);
        } else {
            return null;
        }
    }

    /**
     * Used to get instance of <i>Image</i> object using <i>ClassLoader</i> as
     * resource provider.
     * @param resourceName Name of the resource where image stored.
     * @return Instance of <i>Image</i> object or <code>null</code> if
     * resource is not found.
     */
    public static Image getImage(String resourceName) {
        return getImage(null, resourceName);
    }

    /**
     * Used to get instance of <i>Image</i> object. Specified class or
     * <i>ClassLoader</i> if class is null are used to get access to the
     * resource where image is stored.
     * @param _class Class used to get the image resource.
     * May be <code>null</code>.
     * @param resourceName Name of the resource where image is stored.
     * @return Instance of <i>Image</i> object or <code>null</code> if
     * resource is not found.
     */
    public static Image getImage(Class<?> _class, String resourceName) {
        URL resource;
        if (_class != null) {
            // Strange things happens here:
            // The following code must work in web start,
            // but is not working in local Java application.
            resource = _class.getClassLoader().getResource(resourceName);
            // that's why following code used:
            if (resource == null) {
                resource = _class.getResource(resourceName);
            }

        } else {
            resource = Thread.currentThread().getContextClassLoader().getResource(resourceName);
        }
        if (resource != null) {
            return Toolkit.getDefaultToolkit().getImage(resource);
        } else {
            return null;
        }
    }
}

Related

1. getIcono()
2. getPressedExitIcon(int x, int y)
3. getResourceIcon(Object target, String name)
4. getScaledIcon(Icon icon)
5. getScaledIcon(Icon tmpIcon, int w, int h, boolean incr)
6. getSize(String graphIconPath)
7. getTransparentIcon(int width)
8. getVerBumpIcon()
9. grayIcon(Icon icon)