Re: Red X image displayed where the applet should be, applets won't run

Roedy Green wrote:


Thanks

it seems to work However I found this information easier to understand.

http://www.particle.kth.se/~lindsey/JavaCourse/Book/Part1/Java/Chapter06/images.html

http://tinyurl.com/qb3vu

http://faq.javaranch.com/java/AppletsFaq

http://tinyurl.com/5xutxw

How can an applet load an image?

Image img = getImage(getCodeBase(), "anImage.gif");

that was the right approach.

// "Java Tech"
// Code provided with book for educational purposes only.
// No warranty or guarantee implied.
// This code freely available. No copyright claimed.
// 2003
//

// Begun with StartJApplet2
// minor modifications by morton

/*
 <applet code="ImageApplet.class" width="300" height="300">
  </applet>
*/

import javax.swing.*;
import java.awt.*;

/** Demonstrate drawing an image. **/
public class ImageApplet extends JApplet
{

     static final long serialVersionUID = -7028750069844823554L;

    public void init ()
    {
    Container content_pane = getContentPane();

    // Grab the image.
    Image img = getImage (getCodeBase(), "duke_waving.gif");

    // Create an instance of DrawingPanel
    DrawingPanel drawing_panel = new DrawingPanel(img);

    // Add the DrawingPanel to the contentPane.
    content_pane.add (drawing_panel);

    } // End init

} // End ImageApplet

/** Draw on a JPanel rather than on JApplet's Panel. **/
class DrawingPanel extends JPanel
{

     static final long serialVersionUID = 5548184581010973132L;

    Image img;

    DrawingPanel(Image img)
    {
    this.img = img;
    }

    public void paintComponent (Graphics g)
    {
    super.paintComponent (g);

    // Use the image width& width to find the starting point
    int img_x = getSize().width/2 - img.getWidth(this)/2;
    int img_y = getSize().height/2 - img.getHeight(this)/2;

    //Draw image at centered in the middle of the panel
    g.drawImage(img, img_x, img_y, this);

    } // paintComponent

} // class DrawingPanel

/*

 javac -Xlint ImageApplet.java

bash-3.00$ javac -Xlint ImageApplet.java
ImageApplet.java:19: warning: [serial] serializable class ImageApplet
has no definition of serialVersionUID
public class ImageApplet extends JApplet
       ^
ImageApplet.java:45: warning: [serial] serializable class DrawingPanel
has no definition of serialVersionUID
class DrawingPanel extends JPanel
^
2 warnings
bash-3.00$

bash-3.00$ serialver ImageApplet
ImageApplet: static final long serialVersionUID = -7028750069844823554L;
bash-3.00$ serialver DrawingPanel
DrawingPanel: static final long serialVersionUID = 5548184581010973132L;
bash-3.00$

*/

it has two classes and is reported to load on all tested systems with a
recent jvm.

http://tinyurl.com/5x75mp

best regards

Morton