I have a problem with my code I think

[byrne]

I don't know what happend with my code

It is:



import java.awt.Frame;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.net.MalformedURLException;
import java.net.URL;

import javax.swing.ImageIcon;


public class Ejemplo1 extends Frame implements KeyListener {

private static final long serialVersionUID = 1L;

private String imageURL = "http://dreamers.com/byrne/46.jpg";
private ImageIcon imagen;
private int x;
private int y;

public static void main (String[] args) {
Ejemplo1 ejemplo = new Ejemplo1();
ejemplo.setVisible (true);
}

Ejemplo1() {
super ("Ejemplo1");
setSize (100, 257);
try {
imagen = new ImageIcon (new URL (imageURL));
} catch ( MalformedURLException e) {
e.printStackTrace ();
}
x = 100;
y = 257;
addKeyListener (this);
addWindowListener (new WindowAdapter(){

@Override
public void windowClosing (WindowEvent e) {
System.exit(0);
}

});
}

@Override
public void keyPressed (KeyEvent e) {
boolean cambio = true;
switch (e.getKeyCode())
{
case KeyEvent.VK_UP:
y--;
break;
case KeyEvent.VK_DOWN:
y++;
break;
case KeyEvent.VK_LEFT:
x--;
break;
case KeyEvent.VK_RIGHT:
x++;
break;
default:
cambio = false;
}
if(cambio)
repaint();
}

@Override
public void paint (Graphics g) {
if (imagen!=null) {
g.drawImage (imagen.getImage(), x, y, imagen.getImageObserver());
} else {
g.drawString ("Can't load image " + imageURL, x, y);
}
}

@Override
public void keyReleased(KeyEvent e) {}

@Override
public void keyTyped(KeyEvent e) {}

}


My program is compilated well with the "javac"

but when i try to show it with a applet it show me this kind of message where it should be to show the image:


Java Plug-in 1.6.0_26
Usar versión JRE 1.6.0_26-b03 Java HotSpot(TM) Client VM
Directorio local del usuario = C:\Users\Jose
----------------------------------------------------
c: borrar ventana de consola
f: finalizar objetos en la cola de finalización
g: liberación de recursos
h: presentar este mensaje de ayuda
l: volcar lista del cargador de clases
m: imprimir sintaxis de memoria
o: activar registro
q: ocultar consola
r: recargar configuración de norma
s: volcar propiedades del sistema y de despliegue
t: volcar lista de subprocesos
v: volcar pila de subprocesos
x: borrar antememoria del cargador de clases
0-5: establecer nivel de rastreo en <n>
----------------------------------------------------


java.lang.reflect.InvocationTargetException
at com.sun.deploy.util.DeployAWTUtil.invokeAndWait(Un known Source)
at sun.plugin2.applet.Plugin2Manager.runOnEDT(Unknown Source)
at sun.plugin2.applet.Plugin2Manager.createApplet(Unk nown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionR unnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.RuntimeException: java.lang.IllegalAccessException: Class sun.plugin2.applet.Plugin2Manager$12 can not access a member of class Ejemplo1 with modifiers ""
at sun.plugin2.applet.Plugin2Manager$12.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectio nPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilter s(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(U nknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarch y(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.lang.IllegalAccessException: Class sun.plugin2.applet.Plugin2Manager$12 can not access a member of class Ejemplo1 with modifiers ""
at sun.reflect.Reflection.ensureMemberAccess(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
... 15 more
Excepción: java.lang.reflect.InvocationTargetException

you know what happen? the applet only shows a message where it should be to show the image, simple like this: "Error, do click to show the error" and i did click and it show me the code of the exceptions before

Thanks for your Help!

[Sean4u]

'Modifiers' are the keywords that go before your member names. Your constructor 'Ejemplo1()' has no modifiers. I'm not familiar with this kind of error because I tend to be a bit anally retentive when it comes to modifiers, specifying as many as I possibly can, but I'd say the JVM is attempting to find a super-class constructor with matching (that is, none at all) modifiers. I'm surprised that wasn't caught at compile time, if that's the cause.

[Norm]

Can you post the lines of code in the applet that is creating the Ejemplo1 object?

What is the relationship between the applet and the Ejemplo1 class?

[byrne]

This is the code where I have put the applet, it is a htm archive which the name is: Ejemploprueba.htm


the code is:


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title></title>

</head>

<body>

<applet code="Ejemplo1.class" height="150" width="300">

</applet>

</body>

</html>


I expect you can resolve the problem, thanks!

[Norm]

Your class MUST extend an applet class.
public class Ejemplo1 extends Frame

Your code is not written to be an applet. Go to this site and Find applet:
http://download.oracle.com/javase/tu...ybigindex.html

and read about applets.

[byrne]

Thanks I didn´t realise the program starts with the class frame not applet class, how you should suppose I am still a beginner in program in java and i don't still realise sometimes with this kinds of things Thanks a lot!