Java Tutorial/Swing/JRootPane

Customizing JRootPane Look and Feel

Property StringObject TypeRootPane.actionMapActionMapRootPane.ancestorInputMapInputMapRootPane.colorChooserDialogBorderBorderRootPane.defaultButtonWindowKeyBindingsObject[ ]RootPane.errorDialogBorderBorderRootPane.fileChooserDialogBorderBorderRootPane.frameBorderBorderRootPane.informationDialogBorderBorderRootPane.plainDialogBorderBorderRootPane.questionDialogBorderBorderRootPane.warningDialogBorderBorderRootPaneUIString

Interact directly with the JRootPane of a JFrame

   <source lang="java">

import java.awt.Container; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JRootPane; public class Main {

 public static void main(String[] args) {
   JFrame f = new JFrame();
   f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JRootPane root = f.getRootPane();
   Container content = root.getContentPane();
   content.add(new JButton("Hello"));
   f.pack();
   f.setVisible(true);
 }

}</source>

JRootPane

The JRootPane class acts as a container delegate for the top-level Swing containers.

Make a JFrame looks like a JDialog

   <source lang="java">

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);
 }

}</source>

Setting the default button

1. Dark border
2. pressing the Enter key to trigger button"s event

   <source lang="java">

import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JRootPane; public class SettingDefaultButtonJRootPane {

 public static void main(String args[]) {
   JFrame frame = new JFrame("DefaultButton");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JButton button4 = new JButton("AAA");
   frame.add(button4,"Center");
   frame.add(new JButton("BBB"),"South");
   JRootPane rootPane = frame.getRootPane();
   rootPane.setDefaultButton(button4);
   frame.setSize(300, 200);
   frame.setVisible(true);
 }

}</source>

Setting Window Decoration Style

   <source lang="java">

import javax.swing.JFrame; import javax.swing.JRootPane; public class AdornSample {

 public static void main(final String args[]) {
   JFrame frame = new JFrame("Adornment Example");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   frame.setUndecorated(true);
   frame.getRootPane().setWindowDecorationStyle(JRootPane.FRAME);
   frame.setSize(300, 100);
   frame.setVisible(true);
 }

}</source>