CODEWITHSUNDEEP
javaswingjframenetbeans-7
CodeAngel
CodeAngel

Reputation: 579

Set JFrame to center of Screen in NetBeans

I am developing a java swing desktop application with NetBeans and I want to set the JFrame to the centre of the screen.

from the net I understand that I can use 

setLocationRelativeTo(null);

to set the frame to the centre But i am unable to insert the code into the NetBeans IDE because both the frame.pack() and frame.setVisible() are generated codes of the NetBeans 7 IDE and it will not permit any code insertion between the two methods.

I need to to obtain the following :

frame.pack() 
setLocationRelativeTo(null);
frame.setVisible()

Any suggestion on how to fix the problem?

Upvotes: 10

Views: 87966

Answers (10)

AviralSingh
AviralSingh

Reputation: 1

in order to make sure that jframe is at the center in netbeans follow the instructions :

right click on jframe --> properties -->

now turn on the : generate center option and make sure that form size property --> generate resize code

Upvotes: 0

Anant Mahale
Anant Mahale

Reputation: 1

try....

public class_name{
     initComponents();
        setLocationRelativeTo(this);
}

Upvotes: 0

Ragataj
Ragataj

Reputation: 69

  • at the constructor writing give code below will make your jframe at the center of the screen

    public ProjectWork_jframe() {
initComponents();

Dimension screenSize,frameSize;
int x,y;
screenSize=Toolkit.getDefaultToolkit().getScreenSize();
frameSize=getSize();
x=(screenSize.width-frameSize.width)/2;
y=(screenSize.height-frameSize.height)/2;
setLocation(x, y);
}

Upvotes: 0

JoshuaTree
JoshuaTree

Reputation: 1261

Within the Netbeans Designer area, choose your JFrame, go to code.

Within code, change Form Size Policy to "Generate Resize Code"

Then choose the Generate Center Option.

Upvotes: 0

Neelesh
Neelesh

Reputation: 41

Follow the following simple steps:

  • select the frame and go to the properties.
  • click on code section and click on checkbox Generate Center.

That's it.

Upvotes: 4

princesspeach
princesspeach

Reputation: 171

On the constructor of the frame, you have this:

public frame() {     
   initComponents();
}

You only have to put this line: "this.setLocationRelativeTo(null);" under the "initComponents();"

And you'll have this: 

public frame() {     
   initComponents();
   this.setLocationRelativeTo(null);
}

Run it, and it the frame should show on the center of the screen =)

Upvotes: 16

Ayvadia
Ayvadia

Reputation: 339

From the link @DerekMannering posted:

Netbeans actually generates centering logic on its own versus through property use, so you won't see setLocationRelativeTo option. Go to the Code tab in the properties window. Locate the "Form Size Policy" label in the Code tab. In the drop-down select "Generate Resize Code". Then make sure the property with the label "Generate Center" is checked. Too you'll want to make sure "Generate Size" is checked as well. Should be by default, but you should check anyways. Now, that will work best for JFrame or Frame extensions.

Upvotes: 0

user2263202
user2263202

Reputation: 271

Properties ->Code -> check out Generate Center

Upvotes: 27

Derek Mannering
Derek Mannering

Reputation: 21

I am not sure if you got an answer to your problem, but a solution was given in the following link by Wade Chandler on the NetBeans forum. Unfortunately the originator of the query being answered was impatient to say the least and you have to work through some angst to get to the answer.

http://forums.netbeans.org/ptopic37419.html

Wade shows how to centre the GUI and what aspects of the code you can modify.

As an aside, if you want to place the GUI at a set position on the screen then you can use:

This requires access to the Properties ->Code window as well. 1. Ensure you select the Frame (not a component or outside!) 2. Go to the Code tab in the properties window for the JFrame. 3. Locate the "Form Size Policy" label. 4. In the drop-down select "Generate Resize Code". 5. Modify the form position by clicking the "..." next to it. 6. Also, make sure "Generate Size" is checked as well.

If you want to place the GUI top left on the screen then use the default [0,0] for form position. To position a second GUI next to the first use [450,0]. In this case the x-value has been changed to 450, the Y-value is kept a 0. To move the GUI down the screen then change the Y-value from 0 to say 450.

Finally, there is a NetBeans bug 226740 that can result in problems when trying to centre some aspects of a GUI. It will probably not affect you, but it is useful to be aware of it.

Regards

Derek

Upvotes: 2

Jean Waghetti
Jean Waghetti

Reputation: 4727

Is setVisible() on generated code? Strange. Anyway, you can right click the JFrame in Navigator and select Properties. Go to Code and select it to do nothing. Then manually insert you code after initComponents() in the JFrame constructor.

Upvotes: 2

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