Applet, How to get the image displayed PLEASE HELP

[Shiva Mohan]

Hi Friends,

In my applet program, I have a problem in loading the image.

First I wrote

im1=getImage(getDocumentBase(),"C:/Documents and Settings/Mohan.RBCHRIT7/Desktop/HTML/Exercise1/images/Grocery.gif");
sugarPix = new JButton(new ImageIcon(im1));

When I run this, it gave me NullPointerException.(that means the image is not loaded to im1). Do I need to use drawImage in paint()? I searched google.com and found the code below:

Image redball = Toolkit.getDefaultToolkit().getImage ( "C:/Documents and Settings/Mohan.RBCHRIT7/Desktop/HTML/Exercise1/images/Grocery.gif");
sugarPix = new JButton(new ImageIcon(redball));

This code displayed the image without any problem. But, outside of applets you can use the getImage method from the default toolkit instead, like above.

Question:
How can I get the image in Applet, without using getDefaultToolkit()?

[marc weber]

Moving to the Applet forum for expert attention...

[Keith Lynn]

One thing you can try is to use a MediaTracker to make sure the image loads before you try to use it.

[Shiva Mohan]

Thanks,I am working on that.

[Craig Wood]

Check the getImage(URL url, String name) method in the Applet api to see that the name must be relative to the url. When you fix this you run into file permission problems. Another approach is to move the image file into/onto your class path and let the class loader find it with the getResource method which is introduced in How to Use Icons (see "Loading Images Using getResource" and "Loading Images Into Applets"). You discovered the other way: load the image in another class using Toolkit/MediaTracker, ImageIcon or ImageIO loading methods.

//  <applet code="AppletImageTest" width="400" height="400"></applet>
import java.awt.*;
import javax.swing.*;
 
public class AppletImageTest extends JApplet
{
    public void init()
    {
        String path = "images/bclynx.jpg";
        Image image = getImage(getClass().getResource(path));
        MediaTracker mt = new MediaTracker(this);
        mt.addImage(image, 0);
        try
        {
            mt.waitForID(0);
        }
        catch(InterruptedException ie)
        {
            System.err.println("load interrupt: " + ie.getMessage());
        }
        JLabel label = new JLabel(new ImageIcon(image));
        getContentPane().setLayout(new BorderLayout());
        getContentPane().add(label);
    }
}

[Shiva Mohan]

Hi Craig,
Excellent.It works well for me.Thanks for the coding.