Java Tutorial/Development/Toolkit
Centering a Frame, Window, or Dialog on the Screen
import java.awt.Dimension;
import java.awt.Toolkit;
import javax.swing.JFrame;
public class Main {
public static void main(String[] argv) throws Exception {
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
JFrame window = new JFrame();
window.setSize(300,300);
int w = window.getSize().width;
int h = window.getSize().height;
int x = (dim.width - w) / 2;
int y = (dim.height - h) / 2;
window.setLocation(x, y);
window.setVisible(true);
}
}
Getting the Screen Size
import java.awt.Dimension;
import java.awt.Toolkit;
public class Main {
public static void main(String[] argv) throws Exception {
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
System.out.println(dim);
}
}
java.awt.Toolkit
The Toolkit abstract class has the following methods:
- public static Toolkit getDefaultToolkit(): Returns the default implementation of the Toolkit class.
- public abstract void beep (): Produces a beep sound.
- public abstract Dimension getScreenSize (): Returns a java.awt.Dimension object containing the width and the height of the screen.