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New JavaBeans Component vs. New JPanel Form and the "Design" pane

 
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wahoodoss



Joined: 13 Mar 2012
Posts: 3
PostPosted: Wed Mar 14, 2012 12:13 am    Post subject: New JavaBeans Component vs. New JPanel Form and the "Design" pane Reply with quote
Hi Everyone!!

I'm a newbie to the NetBeans IDE; I've usually used Eclipse. I switched to NetBeans because I like its GUI builder versus the WindowBuilder Pro plugin for Eclipse.

I'm also a newbie to Java Beans; I fiddled with them a long while back but I have forgotten everything.

Because of the above constraints, I fear my question might be quite basic but a quick search with Mr. Google didn't help.

Here goes ... I'm starting a new project. I want to create some custom panels that will be reusable and that I can place on the GUI widget palette. If I create a "New JPanel Form ..." I can use the GUI builder "Design" workspace. But then I have to add the "implements Serializable".

If I create a "New JavaBeans Component ...", I get a Java Beans template but I have to add "extends JPanel". Also I don't get a GUI builder design workspace so I have to build the GUI by hand.

I'm sure I'm missing something fundamental here but I'm confused about what is the difference in the two approaches. Do my custom Panels have to be "beans" to go on the GUI palette? Are they already beans because they extend JPanel? Is there a good tutorial/article that would explain this for me?

Thanks times infinity!!
Bill
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Chuck Davis
Posted via mailing list.
PostPosted: Wed Mar 14, 2012 2:56 pm    Post subject: New JavaBeans Component vs. New JPanel Form and the "Design" pane Reply with quote
Bill, why do you think you have to add the Serializable interface to
your JPanel? Are you going to try to send your JPanel across a wire?
If so, why?

Tell us more about what you're thinking. Just create a JPanel,
compile and add to your palette manager. Why does this not work for
you?

Chuck





On Tue, Mar 13, 2012 at 5:14 PM, wahoodoss <address-removed> wrote:
Quote:
Hi Everyone!!

I'm a newbie to the NetBeans IDE; I've usually used Eclipse.
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wahoodoss



Joined: 13 Mar 2012
Posts: 3
PostPosted: Thu Mar 15, 2012 3:54 pm    Post subject: Reply with quote
Hey Chuck, thanks for helping.

I think my confusion results because of a not complete understand of just what is a "Java Bean" and because I thought that in order to place a custom component, i.e. user created subclass of a standard component, on the palette it had to be a bean. [Note: I know how to add a custom widget to the palette; I was able to figure that one out . Smile]

Think that it had to be a "bean", the first custom panel that I created, I started as a "New | JavaBeans Component", which gave me :

Code:

public class MyFirstPanel implements Serializable {


along with the "propertySupport" lines of code. However, there was no "extends JPanel". I added this myself, but after I added it, I did not get the "Design" or GUI building window, which lets one add components to the panel. I had to hand build the code.

The next custom panel I started as a "New | Java JPanel", which gave me

Code:

public class MySecondPanel extends javax.swing.JPanel {


With this panel, I did get the "Design" window so I can click and drag widgets to the panel. Still thinking that I needed the panel to be a "bean", I added "implement Serializable" and propertySupport code (for non-gui properties).

I read somewhere that Java components are already in fact "beans". Therefore I now know that I don't need the "implement Serializable". I'm not sure about the "propertySupport" stuff for my non-gui fields but I think I'm getting a better handle on what's going on.

I figure the panels that I started as "New | JavaBeans Compone" will have to be recreated starting with "New | Java JPanel" in order to get the "Design" window.

Thanks,
Bill
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Chuck Davis
Posted via mailing list.
PostPosted: Fri Mar 16, 2012 1:58 pm    Post subject: New JavaBeans Component vs. New JPanel Form and the "Design" pane Reply with quote
I agree with your conclusion. Sounds like you're on the right track.
Good luck and welcome to the world's finest IDE!

On Thu, Mar 15, 2012 at 8:55 AM, wahoodoss <address-removed> wrote:
Quote:
Hey Chuck, thanks for helping.

I think my confusion results because of a not complete understand of just what is a "Java Bean" and because I thought that in order to place a custom component, i.e. user created subclass of a standard component, on the palette it had to be a bean.
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