Ad:

Java Discussion Thread
Unsolved
Views: 3571

Jun 12th, 2005

netbeans 4.0 HELP!

Expand Post »

i know java, ive had two classes in it but ive only written it in notepad.. lol

so here im trying to make an applet in netbeans and implement an action listener.. why do i get an error at my first line here:

Java Syntax (Toggle Plain Text)
import java.awt.event.*;
import java.awt.*;
 
public class applet1 extends java.applet.Applet implements java.awt.event.ActionListener
import java.awt.event.*;
import java.awt.*;

public class applet1 extends java.applet.Applet implements java.awt.event.ActionListener

i.e this line:

Java Syntax (Toggle Plain Text)
public class applet1 extends java.applet.Applet implements java.awt.event.ActionListener
public class applet1 extends java.applet.Applet implements java.awt.event.ActionListener

heres the error message i recieve:

Quote ...

applet1 is not abstract and does not override abstract method actionPerformed(java.awt.event.ActionEvent) in java.awt.event.ActionListener

what can i do to fix this? is netbeans doing something for me to where i dont have to write this? or do i have to use a frame?

thanks

Similar Threads

How to download source code for NetBeans and Eclipse? in Java
netbeans problem in Java
Integrating NetBeans 4.0 and Microsoft VSS 6.0 in Java
linux/netbeans problem with default color covers set color of JTabbedPane in Java
first project in netbeans in Java

Wrath

Reputation Points: 10

Solved Threads: 0

Newbie Poster

Offline

5 posts
since Jun 2005

Permalink

Jun 12th, 2005

Re: netbeans 4.0 HELP!

Did you override that method? If not you need to add this method in your class;

Java Syntax (Toggle Plain Text)
public void actionPerformed(ActionEvent ae)
{
}
public void actionPerformed(ActionEvent ae)
{
}

server_crash

Reputation Points: 113

Solved Threads: 19

Postaholic

Offline

2,108 posts
since Jun 2004

Permalink

Jun 12th, 2005

Re: netbeans 4.0 HELP!

hmm i will add that! i was just trying to get it to build but if it wont build without that class then ill add it!

also why do i have to write this like this:

Java Syntax (Toggle Plain Text)
extends java.applet.Applet
extends java.applet.Applet

why not like this:

Java Syntax (Toggle Plain Text)

extends Applet

is this something new or just something netbeans does?

Wrath

Reputation Points: 10

Solved Threads: 0

Newbie Poster

Offline

5 posts
since Jun 2005

Permalink

Jun 12th, 2005

Re: netbeans 4.0 HELP!

Import java.applet.*;
and that should allow it. Since you don't have an import statement you're having to use the fully qualified name. The same goes for the actionListener. If you don't want to continously use the fully qualified name, then:
import java.awt.event.*;

By the way, if you want to just test the app and not worry about adding that method, just take off the implements.... statement.

server_crash

Reputation Points: 113

Solved Threads: 19

Postaholic

Offline

2,108 posts
since Jun 2004

Permalink

Jun 12th, 2005

Re: netbeans 4.0 HELP!

thanks for the help

i decided to start from the top with a hello world. well i cant get it to open the applet, ill run it and it will just build it.. heres the code, am i doing something small wrong?

Java Syntax (Toggle Plain Text)
import java.awt.event.*;
import java.awt.*;
import java.applet.*;
 
public class applet1 extends Applet
{
    public static void main(String args[])
    {
    System.out.println("Hello World");
    }
 
    public void init() 
    {
 
    }
 
    // TODO overwrite start(), stop() and destroy() methods
}
import java.awt.event.*;
import java.awt.*;
import java.applet.*;

public class applet1 extends Applet
{
    public static void main(String args[])
    {
    System.out.println("Hello World");
    }
    
    public void init() 
    {
     
    }
    
    // TODO overwrite start(), stop() and destroy() methods
}

also im wondering if i should be using an applet.. are frames and applets the same? i just want to make an application thats readily available anywhere where you have internet access

Wrath

Reputation Points: 10

Solved Threads: 0

Newbie Poster

Offline

5 posts
since Jun 2005

Permalink

Jun 13th, 2005

Re: netbeans 4.0 HELP!

Quote originally posted by Wrath ...

thanks for the help

i decided to start from the top with a hello world. well i cant get it to open the applet, ill run it and it will just build it.. heres the code, am i doing something small wrong?
Java Syntax (Toggle Plain Text)
import java.awt.event.*;
import java.awt.*;
import java.applet.*;
 
public class applet1 extends Applet
{
    public static void main(String args[])
    {
    System.out.println("Hello World");
    }
 
    public void init() 
    {
 
    }
 
    // TODO overwrite start(), stop() and destroy() methods
}
import java.awt.event.*; import java.awt.*; import java.applet.*; public class applet1 extends Applet { public static void main(String args[]) { System.out.println("Hello World"); } public void init() { } // TODO overwrite start(), stop() and destroy() methods }
also im wondering if i should be using an applet.. are frames and applets the same? i just want to make an application thats readily available anywhere where you have internet access

First of all, you DON'T have a main method with an applet you use the init() method(which you have). Second, applets are funny about calls to the command line, I doubt you'll get that to work. Instead make it draw the Hello world on the applet. like this:

Java Syntax (Toggle Plain Text)
import java.awt.event.*;
import java.awt.*;
import java.applet.*;
 
public class applet1 extends Applet
{
    public void init() 
    {
 
    }
    public void paint(Graphics g)
   {
         g.drawString("Hello World",0,0);
   }
    // TODO overwrite start(), stop() and destroy() methods
}
import java.awt.event.*;
import java.awt.*;
import java.applet.*;

public class applet1 extends Applet
{
    public void init() 
    {
     
    }
    public void paint(Graphics g)
   {
         g.drawString("Hello World",0,0);
   }
    // TODO overwrite start(), stop() and destroy() methods
}

See if that works.

For your last question, I would go with an applet. You won't be able to just run a framed application anywhere like you can an applet. ALL newer browsers support java and will show up applets.

server_crash

Reputation Points: 113

Solved Threads: 19

Postaholic

Offline

2,108 posts
since Jun 2004

Permalink

Jun 13th, 2005

Re: netbeans 4.0 HELP!

it will only pop up the applet if i right click the actual applet1.java icon in the projects list at the left but it wont display the hello world!.. anywhere else like in run/run main project, a pop up says "no main classes found"

thanks

Wrath

Reputation Points: 10

Solved Threads: 0

Newbie Poster

Offline

5 posts
since Jun 2005

Permalink

Jun 13th, 2005

Re: netbeans 4.0 HELP!

oops im sorry, its late!

haha yea so i had the x and y values still at 0,0 so it wasnt showing up..

thanks again!

Wrath

Reputation Points: 10

Solved Threads: 0

Newbie Poster

Offline

5 posts
since Jun 2005

Permalink

Jun 13th, 2005

Re: netbeans 4.0 HELP!

No problem. Your very welcome. If you have any other trouble just give me a holler.

server_crash

Reputation Points: 113

Solved Threads: 19

Postaholic

Offline

2,108 posts
since Jun 2004

This thread is more than three months old

No one has posted to this discussion for at least three months. Please let old threads die and do not reply to them unless you feel you have something new and valuable to contribute that absolutely must be added to make the discussion complete. Otherwise, please start a new thread in this forum instead.

Previous Thread in Java Forum Timeline: 'directed acyclic word graph'??

Next Thread in Java Forum Timeline: Java GUI problem... contents of JFrame is invisible...

DaniWeb Message

Cancel Changes

User Name
Password