How to create a Borderless Window in Java?

To create a borderless window in Java, do not decorate the window. The following is an example to create a BorderLess Window −

Example

package my;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.Point;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.JWindow;
import javax.swing.SwingConstants;
public class SwingDemo {
   public static void main(String[] args) throws Exception {
      JWindow frame = new JWindow();
      JLabel label1, label2, label3;
      frame.setLayout(new GridLayout(2, 2));
      label1 = new JLabel("Id", SwingConstants.CENTER);
      label2 = new JLabel("Age", SwingConstants.CENTER);
      label3 = new JLabel("Password", SwingConstants.CENTER);
      JTextField emailId = new JTextField(20);
      JTextField rank = new JTextField(20);
      JPasswordField passwd = new JPasswordField();
      passwd.setEchoChar('*');
      frame.add(label1);
      frame.add(label2);
      frame.add(label3);
      frame.add(emailId);
      frame.add(rank);
      frame.add(passwd);
      Point center = GraphicsEnvironment.getLocalGraphicsEnvironment().getCenterPoint();
      int width = 500;
      int height = 200;
      frame.setBounds(center.x - width / 2, center.y - height / 2, width, height);
      frame.setVisible(true);
   }
}

Output