Java/Swing JFC/RootPane

An example of interacting directly with the JRootPane of a JFrame

   <source lang="java">

/* Java Swing, 2nd Edition By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole ISBN: 0-596-00408-7 Publisher: O"Reilly

• /

// RootExample.java //An example of interacting directly with the JRootPane of a JFrame. // import java.awt.Container; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JRootPane; public class RootExample {

 public static void main(String[] args) {
   JFrame f = new JFrame();
   f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JRootPane root = f.getRootPane(); // XXX Pay attention to these
   Container content = root.getContentPane(); // XXX lines. They get more
   content.add(new JButton("Hello")); // XXX explanation in the book.
   f.pack();
   f.setVisible(true);
 }

}

 </source>
   
  
 
  

Another example of interacting with the root pane

   <source lang="java">

/* Java Swing, 2nd Edition By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole ISBN: 0-596-00408-7 Publisher: O"Reilly

• /

// RootExample2.java //Another example of interacting with the root pane. We set the menubar //for the frame directly through the root pane in this example. // import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JRootPane; public class RootExample2 {

 public static void main(String[] args) {
   JFrame f = new JFrame();
   f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   JRootPane root = f.getRootPane();
   // Create a menu bar
   JMenuBar bar = new JMenuBar();
   JMenu menu = new JMenu("File");
   bar.add(menu);
   menu.add("Open");
   menu.add("Close");
   root.setJMenuBar(bar);
   // Add a button to the content pane
   root.getContentPane().add(new JButton("Hello World"));
   // Display the UI
   f.pack();
   f.setVisible(true);
 }

}

 </source>
   
  
 
  

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>
   
  
 
  

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>
   
  
 
  

No direct interaction with JRootPane

   <source lang="java">

/* Java Swing, 2nd Edition By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole ISBN: 0-596-00408-7 Publisher: O"Reilly

• /

// RootExample3.java //Similar to RootExample2, but this version uses the setJMenuBar() method //from JFrame to attach the menu. No (direct) interaction with JRootPane //is needed. // import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; public class RootExample3 extends JFrame {

 public RootExample3() {
   super("RootPane Menu Demo");
   setSize(220, 100);
   setDefaultCloseOperation(EXIT_ON_CLOSE);
   // Create a menu bar
   JMenuBar bar = new JMenuBar();
   JMenu menu = new JMenu("File");
   bar.add(menu);
   menu.add("Open");
   menu.add("Close");
   setJMenuBar(bar);
   // Add a button to the content pane
   getContentPane().add(new JButton("Hello World"));
 }
 public static void main(String[] args) {
   RootExample3 re3 = new RootExample3();
   re3.setVisible(true);
 }

}

 </source>