To maximize JFrame in Java Swing, use the following −
JFrame.MAXIMIZED_BOTH
The following is an example to maximize JFrame in Java −
Example
package my;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class SwingDemo extends JFrame {
JPanel panel = new JPanel();
public SwingDemo() {
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setAlwaysOnTop(true);
setResizable(true);
setExtendedState(this.getExtendedState() | JFrame.MAXIMIZED_BOTH);
}
public static void main(String[] args) { new SwingDemo();
}
}
The output is as follows. Here, the JFrame is visible with no border and title −
Output