[SOLVED] I can't run my first applet!!

**AlejandroPe** · 03-22-2009, 04:16 PM

Hi!!! I'm a REAL beginner and just stumbled upon my first problem :(

I have this code in a applet with extension .java and when I try to run the HTML file that uses the compiled file of this applet´s class I get this error:

the class HelloAgainApplet.class> does not exist (I'm translating the real message into English for you to understand it.)
As well as: java.lang.ClassNotFoundException: HelloAgainApplet.class>

THANKS for your comments/help

APPLET:

import java.awt.Graphics;
import java.awt.Font;
import java.awt.Color;
public class HelloAgainApplet extends java.applet.Applet{

Font f = new Font("TimesRoman", Font.BOLD, 36);

public void paint(Graphics g){
g.setFont(f);
g.setColor(Color.red);
g.drawString("Hello again!", 5, 25);
}
}

**tomiu** · 03-22-2009, 05:44 PM

do u have the .class file in the same directory as ur html file???

**CJSLMAN** · 03-22-2009, 07:02 PM

Once you have the .java file ready, you have to compile it to convet it into a .class file before it will run.

Trail: Getting Started (The Java™ Tutorials)
Compiling and Running the Examples: FAQs (The Java™ Tutorials)

Luck,
CJSL

**AlejandroPe** · 03-22-2009, 07:39 PM

I only have these files and in the same directory
HelloAgainApplet.java(Java-file)
HelloAgainApplet.class(CLASS-file)
HelloAgainApplet.html(Firefox.-doc)

-------
Am I supposed to have another file to run the applet???
When I did the first example in the book I had these 5 files:

1-HelloWorld.java(JAVA-file)
2-HelloWorld.class(CLASS-file)
3-HelloWorldapplet.java(JAVA-file)
4-HelloWorldapplet.class(CLASS-file)
5-HelloWorld.html(firefox-doc)

**AlejandroPe** · 03-22-2009, 07:47 PM

I only have these ones.

Originally Posted by AlejandroPe

I only have these files and in the same directory
HelloAgainApplet.java(Java-file)
HelloAgainApplet.class(CLASS-file)
HelloAgainApplet.html(Firefox.-doc)

-------
Am I supposed to have another file to run the applet???
When I did the first example in the book I had these 5 files:

1-HelloWorld.java(JAVA-file)
2-HelloWorld.class(CLASS-file)
3-HelloWorldapplet.java(JAVA-file)
4-HelloWorldapplet.class(CLASS-file)
5-HelloWorld.html(firefox-doc)

**AlejandroPe** · 03-22-2009, 07:54 PM

CJSLMAN.
I did compile my java file and I have the class of that file. It happens now that it seems that I´m missing one or two files. Do I need anything else to run my applet?

**CJSLMAN** · 03-22-2009, 07:55 PM

Did your first applet run (HelloWorldApplet.class)? or is the HelloAgainApplet.class your first applet?
A couple of things:

Always post all code and complete error msgs. If the code is too long, then a sample code is perfered.
There is a subforum specific to Java applets were this might get more exposure.

Luck,
CJSL

**AlejandroPe** · 03-22-2009, 08:06 PM

Yes, my HelloWorldApplet (my first applet) did run. Not the second (HelloAgainApplet).

**CJSLMAN** · 03-22-2009, 08:17 PM

OK... so it's not the installation of the JDK. Let's see the code of the .java file and the .html.

Luck,
CJSL

**AlejandroPe** · 03-22-2009, 08:30 PM

//my code (.java)
import java.awt.Graphics;
import java.awt.Font;
import java.awt.Color;
public class HelloAgainApplet extends java.applet.Applet{

Font f = new Font("TimesRoman", Font.BOLD, 36);

public void paint(Graphics g){
g.setFont(f);
g.setColor(Color.red);
g.drawString("Hello again!", 5, 25);
}
}

**AlejandroPe** · 03-22-2009, 08:32 PM

// and my html

<HTML>
<HEAD>
<TITLE>Another Applet</TITLE>
</HEAD>
<BODY>
<P>My second Java Applet says:
<APPLET CODE ="HelloAgainApplet.class>" WIDTH=200 HEIGHT=50>
</APPLET>
</BODY>
</HTML>

**AlejandroPe** · 03-22-2009, 08:48 PM

I see that there's no file with:

public static void main(String args[])

Do I need a Java application for this applet to run?

**tomiu** · 03-23-2009, 12:27 AM

Originally Posted by AlejandroPe

I see that there's no file with:

public static void main(String args[])

Do I need a Java application for this applet to run?

No u dont need "main" for the applet..

delete ">" after .class

<APPLET CODE ="HelloAgainApplet.class>" WIDTH=200 HEIGHT=50>

**Webuser** · 03-23-2009, 06:38 AM

Originally Posted by tomiu

No u dont need "main" for the applet..

delete ">" after .class

<APPLET CODE ="HelloAgainApplet.class>" WIDTH=200 HEIGHT=50>

Actually you don't need main method for any applet because main method is for applications with JFrame and so on. You need init(){} method instead of main(){}
)))