How to have a Center Screen Window in Java

Submitted by donbermoy on Thursday, December 11, 2014 - 14:45.

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Some of the programs in java is set to its user location using the setLocation method of the JFrame or JWindow because they find it hard to center their window screen. So here in this tutorial, we will create a program that has a center screen window in Java. Now let's start this tutorial! 1. Open JCreator or NetBeans and make a java program with a file name of centerScreen.java. 2. Import the following package library:

import java.awt.*; //used to access the Dimension and Toolkit class
import javax.swing.*; //used to access the JFrame class

3. We will initialize variables in our Main, variable frame as JFrame, kit as ToolKit, and wndSize as Dimension.

    JFrame frame = new JFrame("This is a Center Screen Window");
    Toolkit kit = frame.getToolkit(); // Get the window toolkit
    Dimension wndSize = kit.getScreenSize(); // Get screen size

4. Now, we will set the position to screen center & size to half screen size. We will use the setBounds method here of the frame and then get in on the Dimension class variable declared above.

    frame.setBounds(wndSize.width / 4, wndSize.height / 4, // Position
    wndSize.width / 2, wndSize.height / 2); // Size

5. Display the window using the setVisible method of the frame that returns to true.

frame.setVisible(true); // Display the window

Lastly, close the Operation.

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Output: output

Here's the full code of this tutorial:

import java.awt.*; //used to access the Dimension and Toolkit class
import javax.swing.*; //used to access the JFrame class
 
public class centerScreen {
  public static void main(String[] args) {
    JFrame frame = new JFrame("This is a Center Screen Window");
    Toolkit kit = frame.getToolkit(); // Get the window toolkit
    Dimension wndSize = kit.getScreenSize(); // Get screen size
    
    // Set the position to screen center & size to half screen size
    frame.setBounds(wndSize.width / 4, wndSize.height / 4, // Position
    wndSize.width / 2, wndSize.height / 2); // Size
    frame.setVisible(true); // Display the window
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
}

For more inquiries and need programmer for your thesis systems in any kind of programming languages, just contact my number below. Best Regards,

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