Java Swing: positioning dialog on top of existing window

java swing jdialog
sivabudh picture sivabudh · Nov 5, 2009 · Viewed 16.5k times · Source

Can someone show simple Java Swing code/web resource that will position the popup dialog center-aligned on top of an existing JFrame window when the JFrame's button clicked?

Answer

sivabudh picture sivabudh · Nov 5, 2009

Oh..it's pretty simple:

Say you have a JFrame that contains a JDialog, and you want the JDialog (when opened) to be right on top of JFrame.

So in JDialog constructor, you should have something like:

public class MyDialog extends JDialog 
public MyDialog(JFrame parent) 
{
    super.setLocationRelativeTo(parent); // this will do the job
}

In other words, pass JFrame pointer to your dialog, and call setLocationRelativeTo(...); method.

Related questions

Java - How to create a custom dialog box?

I have a button on a JFrame that when clicked I want a dialog box to popup with multiple text areas for user input. I have been looking all around to try to figure out how to do this but …

Read More
Button for closing a JDialog

I want to add a button (JButton) at the bottom of a JDialog which should close the JDialog when pressed. The problem is I don't know what to write in the ActionListener of that button. I don't want the button …

Read More
How can I return a value from a JDialog box to the parent JFrame?

I have created a modal JDialog box with a custom drawing on it and a JButton. When I click the JButton, the JDialog box should close and a value should be returned. I have created a function in the parent …

Read More