SWING - JWindow Class
Introduction
The class JWindow is a container that can be displayed but does not have the title bar or window-management buttons.
Class declaration
Following is the declaration for javax.swing.JWindow class:
public class JWindow extends Window implements Accessible, RootPaneContainer
Field
Following are the fields for java.awt.Component class:
protected AccessibleContext accessibleContext -- The accessible context property.
protected JRootPane rootPane -- The JRootPane instance that manages the contentPane and optional menuBar for this frame, as well as the glassPane.
protected boolean rootPaneCheckingEnabled -- If true then calls to add and setLayout will be forwarded to the contentPane.
Class constructors
S.N. | Constructor & Description |
---|---|
1 | JWindow() Creates a window with no specified owner. |
2 | JWindow(Frame owner) Creates a window with the specified owner frame. |
3 | JWindow(GraphicsConfiguration gc) Creates a window with the specified GraphicsConfiguration of a screen device. |
4 | JWindow(Window owner) Creates a window with the specified owner window. |
5 | JWindow(Window owner, GraphicsConfiguration gc) Creates a window with the specified owner window and GraphicsConfiguration of a screen device. |
Class methods
S.N. | Method & Description |
---|---|
1 | protected void addImpl(Component comp, Object constraints, int index) Adds the specified child Component. |
2 | protected JRootPane createRootPane() Called by the constructor methods to create the default rootPane. |
3 | AccessibleContext getAccessibleContext() Gets the AccessibleContext associated with this JWindow. |
4 | Container getContentPane() Returns the Container which is the contentPane for this window. |
5 | Component getGlassPane() Returns the glassPane Component for this window. |
6 | Graphics getGraphics() Creates a graphics context for this component. |
7 | JLayeredPane getLayeredPane() Returns the layeredPane object for this window. |
8 | JRootPane getRootPane() Returns the rootPane object for this window. |
9 | TransferHandler getTransferHandler() Gets the transferHandler property. |
10 | protected boolean isRootPaneCheckingEnabled() Returns whether calls to add and setLayout are forwarded to the contentPane. |
11 | protected String paramString() Returns a string representation of this JWindow. |
12 | void remove(Component comp) Removes the specified component from the container. |
13 | void repaint(long time, int x, int y, int width, int height) Repaints the specified rectangle of this component within time milliseconds. |
14 | void setContentPane(Container contentPane) Sets the contentPane property for this window. |
15 | void setGlassPane(Component glassPane) Sets the glassPane property. |
16 | void setLayeredPane(JLayeredPane layeredPane) Sets the layeredPane property. |
17 | void setLayout(LayoutManager manager) Sets the LayoutManager. |
18 | protected void setRootPane(JRootPane root) Sets the new rootPane object for this window. |
19 | protected void setRootPaneCheckingEnabled(boolean enabled) Sets whether calls to add and setLayout are forwarded to the contentPane. |
20 | void setTransferHandler(TransferHandler newHandler) Sets the transferHandler property, which is a mechanism to support transfer of data into this component. |
21 | void update(Graphics g) Calls paint(g). |
22 | protected void windowInit() Called by the constructors to init the JWindow properly. |
Methods inherited
This class inherits methods from the following classes:
java.awt.Window
java.awt.Container
java.awt.Component
java.lang.Object
JWindow Example
Create the following java program using any editor of your choice in say D:/ > SWING > com > tutorialspoint > gui >
SwingContainerDemo.javapackage com.tutorialspoint.gui; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class SwingContainerDemo { private JFrame mainFrame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; private JLabel msglabel; public SwingContainerDemo(){ prepareGUI(); } public static void main(String[] args){ SwingContainerDemo swingContainerDemo = new SwingContainerDemo(); swingContainerDemo.showJWindowDemo(); } private void prepareGUI(){ mainFrame = new JFrame("Java Swing Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); headerLabel = new JLabel("", JLabel.CENTER); statusLabel = new JLabel("",JLabel.CENTER); statusLabel.setSize(350,100); msglabel = new JLabel("Welcome to TutorialsPoint SWING Tutorial." , JLabel.CENTER); controlPanel = new JPanel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private void showJWindowDemo(){ headerLabel.setText("Container in action: JWindow"); final MessageWindow window = new MessageWindow(mainFrame, "Welcome to TutorialsPoint SWING Tutorial."); JButton okButton = new JButton("Open a Window"); okButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { window.setVisible(true); statusLabel.setText("A Window shown to the user."); } }); controlPanel.add(okButton); mainFrame.setVisible(true); } class MessageWindow extends JWindow{ private String message; public MessageWindow(JFrame parent, String message) { super(parent); this.message = message; setSize(300, 300); setLocationRelativeTo(parent); } public void paint(Graphics g) { super.paint(g); g.drawRect(0,0,getSize().width - 1,getSize().height - 1); g.drawString(message,50,150); } } }
Compile the program using command prompt. Go to D:/ > SWING and type the following command.
D:\SWING>javac com\tutorialspoint\gui\SwingContainerDemo.java
If no error comes that means compilation is successful. Run the program using following command.
D:\SWING>java com.tutorialspoint.gui.SwingContainerDemo
Verify the following output
![SWING JWindow](/swing/images/swing_jwindow.jpg)