Dynamically add a Jpanel to a Jframe

**Closet_Rambo** · September 30th, 2011, 11:42 AM

I have a Jpanel with some widgets on it that I created in Netbeans IDE as a new class ApcUps_Panel

As I detect different APC UPS's sending a UPD broadcast on the network, I want to add one ApcUps_Panel inside a Jframe for each UPS seen on the network.

I am a beginner to Java.

In a nutshell how would I do this?

AcUps_Panel myApcUps_Panel = new ApcUpsPanel();

will create a new jpanel object right?

I need to give it a UPS name feild and draw it on the Jframe at the top down such that each Jpanel is added beloow the last one and a vert scroll bar is created when the JFrame reached the limit of the desktop.

The Jframe should also grow vertically.

**namhm** · September 30th, 2011, 11:56 AM

Well, in a nutshell it is as simple as:

frame.add(panel);

Design your ApcUpsPanel carefully so you can re-use it when adding it to the frame.

java memory

**Closet_Rambo** · September 30th, 2011, 01:02 PM

Will the next panel apear below the first one added?

**copeg** · September 30th, 2011, 02:37 PM

Originally Posted by Closet_Rambo

Will the next panel apear below the first one added?

To manage where Components will appear in the user interface, use a LayoutManager. See the following link:
A Visual Guide to Layout Managers (The Java™ Tutorials > Creating a GUI With JFC/Swing > Laying Out Components Within a Container)

**Closet_Rambo** · October 1st, 2011, 10:51 AM

ApcUps_Frame.add does not fly

The add method does not exist.

I am still severly confused on the whole OOP concept here.
I have a class ApcUps_Frame which has the main method and netbeans constructs the gui Jframe.
Then I added an ApcUps_Panel class and used the wysiwug editor to drop the lables and button and such.

So now I can dynamically create a new Jpanel extended custom jpanel object ... right?
within the main method:

ApcUps_Panel myApcUps_Panel = new ApcUps_Panel();

ApcUps_Frame was already created by netbeans and made visable.
so I did:

ApcUps_Frame.a .... does not allow "add"

I don't really know what I am doing here.

How do you decide which clases to create and construct objects?
I know the syntax but not the wisdom.

**Closet_Rambo** · October 1st, 2011, 01:03 PM

I have found this post which is related:

http://www.javaprogrammingforums.com...el-jframe.html

This seems a great example but there is no talk of why the classes were contructed this way.
This is what us newbie OOPs JAVA folks need the most and there is no tutorials anywhere I can find ... how do you program in object within the JAVA paradigm?

**namhm** · October 3rd, 2011, 03:51 AM

Originally Posted by Closet_Rambo

Will the next panel apear below the first one added?

It depends on which layout manager you are using, as copeg said.

java memory

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