Thread: I have a problem with my code I think

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!

'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.

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?

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!

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.

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!