Make a JFrame looks like a JDialog : JRootPane « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JRootPane

import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JRootPane;

public class Main extends JFrame {

  public Main() {
    setTitle("like JDialog");
    setSize(new Dimension(500, 100));
    setUndecorated(true);
    setResizable(false);
    getRootPane().setWindowDecorationStyle(JRootPane.PLAIN_DIALOG);
    setLocationRelativeTo(null);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
  }

  public static void main(String[] args) {
    new Main().setVisible(true);
  }
}

14.84.JRootPane
	14.84.1.	JRootPane
	14.84.2.	Setting Window Decoration Style
	14.84.3.	Setting the default button
	14.84.4.	Interact directly with the JRootPane of a JFrame
	14.84.5.	Make a JFrame looks like a JDialog
	14.84.6.	Customizing JRootPane Look and Feel