Java Tutorial/Swing/Image ImageIcon

14. Getting Image object from ImageIcon object

   <source lang="java">

import java.awt.Image; import javax.swing.ImageIcon; public class MainClass {

 public static void main(String[] a) {
   ImageIcon imageIcon = new ImageIcon("yourFile.gif");
   Image image = imageIcon.getImage();
 }

}</source>

14. GrayFilter: Create a disabled version of an Image

   <source lang="java">

import java.awt.Image; import javax.swing.GrayFilter; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JLabel; public class CreateDiabledVersionOfanImage {

 public static void main(String[] a) {
   JFrame frame = new JFrame();
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   ImageIcon icon = new ImageIcon("yourFile.gif");
   Image normalImage = icon.getImage();
   Image grayImage = GrayFilter.createDisabledImage(normalImage);
   Icon warningIcon = new ImageIcon(grayImage);
   JLabel warningLabel = new JLabel(warningIcon);
   JLabel label3 = new JLabel("Warning", icon, JLabel.CENTER);
   frame.add(warningLabel,"Center");
   frame.add(label3,"South");
   frame.setSize(300, 200);
   frame.setVisible(true);
 }

}</source>

14. use the image proxy. Images are only loaded when you press on a tab

   <source lang="java">

import java.awt.ruponent; import java.awt.Graphics; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTabbedPane; public class ProxyTester {

 public static void main(String[] args) {
   JTabbedPane tabbedPane = new JTabbedPane();
   for (String name : imageNames) {
     JLabel label = new JLabel(new ImageProxy(name));
     tabbedPane.add(name, label);
   }
   JFrame frame = new JFrame();
   frame.add(tabbedPane);
   frame.setSize(FRAME_WIDTH, FRAME_HEIGHT);
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   frame.setVisible(true);
 }
 private static final String[] imageNames = { "A.gif", "B.gif",
     "C.gif", "D.gif", "E.gif" };
 private static final int FRAME_WIDTH = 500;
 private static final int FRAME_HEIGHT = 300;

} class ImageProxy implements Icon {

 public ImageProxy(String name) {
   this.name = name;
   image = null;
 }
 public void paintIcon(Component c, Graphics g, int x, int y) {
   ensureImageLoaded();
   image.paintIcon(c, g, x, y);
 }
 public int getIconWidth() {
   ensureImageLoaded();
   return image.getIconWidth();
 }
 public int getIconHeight() {
   ensureImageLoaded();
   return image.getIconHeight();
 }
 private void ensureImageLoaded() {
   if (image == null) {
     System.out.println("Loading " + name);
     image = new ImageIcon(name);
   }
 }
 private String name;
 private ImageIcon image;

}</source>