AWT Window Class

Advertisements


Introduction

The class Window is a top level window with no border and no menubar. It uses BorderLayout as default layout manager.

Class declaration

Following is the declaration for java.awt.Window class:

public class Window
   extends Container
      implements Accessible

Class constructors

S.N.Constructor & Description
1Window(Frame owner)
Constructs a new, initially invisible window with the specified Frame as its owner.
2Window(Window owner)
Constructs a new, initially invisible window with the specified Window as its owner.
3Window(Window owner, GraphicsConfiguration gc)
Constructs a new, initially invisible window with the specified owner Window and a GraphicsConfiguration of a screen device.

Class methods

S.N.Method & Description
1void addNotify()
Makes this Window displayable by creating the connection to its native screen resource.
2void addPropertyChangeListener(PropertyChangeListener listener)
Adds a PropertyChangeListener to the listener list.
3void addPropertyChangeListener(String propertyName, PropertyChangeListener listener)
Adds a PropertyChangeListener to the listener list for a specific property.
4void addWindowFocusListener(WindowFocusListener l)
Adds the specified window focus listener to receive window events from this window.
5void addWindowListener(WindowListener l)
Adds the specified window listener to receive window events from this window.
6void addWindowStateListener(WindowStateListener l)
Adds the specified window state listener to receive window events from this window.
7void applyResourceBundle(ResourceBundle rb)
Deprecated. As of J2SE 1.4, replaced by Component.applyComponentOrientation.
8void applyResourceBundle(String rbName)
Deprecated. As of J2SE 1.4, replaced by Component.applyComponentOrientation.
9void createBufferStrategy(int numBuffers)
Creates a new strategy for multi-buffering on this component.
10void createBufferStrategy(int numBuffers, BufferCapabilities caps)
Creates a new strategy for multi-buffering on this component with the required buffer capabilities.
11void dispose()
Releases all of the native screen resources used by this Window, its subcomponents, and all of its owned children.
12AccessibleContext getAccessibleContext()
Gets the AccessibleContext associated with this Window.
13BufferStrategy getBufferStrategy()
Returns the BufferStrategy used by this component.
14boolean getFocusableWindowState()
Returns whether this Window can become the focused Window if it meets the other requirements outlined in isFocusableWindow.
15Container getFocusCycleRootAncestor()
Always returns null because Windows have no ancestors; they represent the top of the Component hierarchy.
16Component getFocusOwner()
Returns the child Component of this Window that has focus if this Window is focused; returns null otherwise.
17Set<AWTKeyStroke> getFocusTraversalKeys(int id)
Gets a focus traversal key for this Window.
18GraphicsConfiguration getGraphicsConfiguration()
This method returns the GraphicsConfiguration used by this Window.
19List<Image> getIconImages()
Returns the sequence of images to be displayed as the icon for this window.
20InputContext getInputContext()
Gets the input context for this window.
21<T extends EventListener> T[] getListeners(Class<T> listenerType)
Returns an array of all the objects currently registered as FooListeners upon this Window.
22Locale getLocale()
Gets the Locale object that is associated with this window, if the locale has been set.
23Dialog.ModalExclusionType getModalExclusionType()
Returns the modal exclusion type of this window.
24Component getMostRecentFocusOwner()
Returns the child Component of this Window that will receive the focus when this Window is focused.
25Window[] getOwnedWindows()
Return an array containing all the windows this window currently owns.
26Window getOwner()
Returns the owner of this window.
27static Window[] getOwnerlessWindows()
Returns an array of all Windows created by this application that have no owner.
28Toolkit getToolkit()
Returns the toolkit of this frame.
29String getWarningString()
Gets the warning string that is displayed with this window.
30WindowFocusListener[] getWindowFocusListeners()
Returns an array of all the window focus listeners registered on this window.
31WindowListener[] getWindowListeners()
Returns an array of all the window listeners registered on this window.
32static Window[] getWindows()
Returns an array of all Windows, both owned and ownerless, created by this application.
33WindowStateListener[] getWindowStateListeners()
Returns an array of all the window state listeners registered on this window.
34void hide()
Deprecated. As of JDK version 1.5, replaced by setVisible(boolean).
35boolean isActive()
Returns whether this Window is active.
36boolean isAlwaysOnTop()
Returns whether this window is an always-on-top window.
37boolean isAlwaysOnTopSupported()
Returns whether the always-on-top mode is supported for this window.
38boolean isFocusableWindow()
Returns whether this Window can become the focused Window, that is, whether this Window or any of its subcomponents can become the focus owner.
39boolean isFocusCycleRoot()
Always returns true because all Windows must be roots of a focus traversal cycle.
40boolean isFocused()
Returns whether this Window is focused.
41boolean isLocationByPlatform()
Returns true if this Window will appear at the default location for the native windowing system the next time this Window is made visible.
42boolean isShowing()
Checks if this Window is showing on screen.
43void pack()
Causes this Window to be sized to fit the preferred size and layouts of its subcomponents.
44void paint(Graphics g)
Paints the container.
45boolean postEvent(Event e)
Deprecated. As of JDK version 1.1 replaced by dispatchEvent(AWTEvent).
46protected void processEvent(AWTEvent e)
Processes events on this window.
47protected void processWindowEvent(WindowEvent e)
Processes window events occurring on this window by dispatching them to any registered WindowListener objects.
48protected void processWindowFocusEvent(WindowEvent e)
Processes window focus event occuring on this window by dispatching them to any registered WindowFocusListener objects.
49protected void processWindowStateEvent(WindowEvent e)
Processes window state event occuring on this window by dispatching them to any registered WindowStateListener objects.
50void removeNotify()
Makes this Container undisplayable by removing its connection to its native screen resource.
51void removeWindowFocusListener(WindowFocusListener l)
Removes the specified window focus listener so that it no longer receives window events from this window.
52void removeWindowListener(WindowListener l)
Removes the specified window listener so that it no longer receives window events from this window.
53void removeWindowStateListener(WindowStateListener l)
Removes the specified window state listener so that it no longer receives window events from this window.
54void reshape(int x, int y, int width, int height)
Deprecated. As of JDK version 1.1, replaced by setBounds(int, int, int, int).
55void setAlwaysOnTop(boolean alwaysOnTop)
Sets whether this window should always be above other windows.
56void setBounds(int x, int y, int width, int height)
Moves and resizes this component.
57void setBounds(Rectangle r)
Moves and resizes this component to conform to the new bounding rectangle r.
58void setCursor(Cursor cursor)
Set the cursor image to a specified cursor.
59void setFocusableWindowState(boolean focusableWindowState)
Sets whether this Window can become the focused Window if it meets the other requirements outlined in isFocusableWindow.
60void setFocusCycleRoot(boolean focusCycleRoot)
Does nothing because Windows must always be roots of a focus traversal cycle.
61void setIconImage(Image image)
Sets the image to be displayed as the icon for this window.
62void setIconImages(List<? extends Image> icons)
Sets the sequence of images to be displayed as the icon for this window.
63void setLocationByPlatform(boolean locationByPlatform)
Sets whether this Window should appear at the default location for the native windowing system or at the current location (returned by getLocation) the next time the Window is made visible.
64void setLocationRelativeTo(Component c)
Sets the location of the window relative to the specified component.
65void setMinimumSize(Dimension minimumSize)
Sets the minimum size of this window to a constant value.
66void setModalExclusionType(Dialog.ModalExclusionType exclusionType)
Specifies the modal exclusion type for this window.
67void setSize(Dimension d)
Resizes this component so that it has width d.width and height d.height.
68void setSize(int width, int height)
Resizes this component so that it has width width and height height.
69void setVisible(boolean b)
Shows or hides this Window depending on the value of parameter b.
70void show()
Deprecated. As of JDK version 1.5, replaced by setVisible(boolean).
71void toBack()
If this Window is visible, sends this Window to the back and may cause it to lose focus or activation if it is the focused or active Window.
72void toFront()
If this Window is visible, brings this Window to the front and may make it the focused Window.

Methods inherited

This class inherits methods from the following classes:

  • java.awt.Window

  • java.awt.Container

  • java.awt.Component

  • java.lang.Object

Window Example

Create the following java program using any editor of your choice in say D:/ > AWT > com > tutorialspoint > gui >

AwtContainerDemo.java
package com.tutorialspoint.gui;

import java.awt.*;
import java.awt.event.*;

public class AwtContainerDemo {
   private Frame mainFrame;
   private Label headerLabel;
   private Label statusLabel;
   private Panel controlPanel;
   private Label msglabel;

   public AwtContainerDemo(){
      prepareGUI();
   }

   public static void main(String[] args){
      AwtContainerDemo  awtContainerDemo = new AwtContainerDemo();          
      awtContainerDemo.showFrameDemo();
   }

   private void prepareGUI(){
      mainFrame = new Frame("Java AWT 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 Label();
      headerLabel.setAlignment(Label.CENTER);
      statusLabel = new Label();        
      statusLabel.setAlignment(Label.CENTER);
      statusLabel.setSize(350,100);
   
      msglabel = new Label();
      msglabel.setAlignment(Label.CENTER);
      msglabel.setText("Welcome to TutorialsPoint AWT Tutorial.");

      controlPanel = new Panel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }
   
   private void showWindowDemo(){
      headerLabel.setText("Container in action: Window");   
      final MessageWindow window = 
         new MessageWindow(mainFrame,
         "Welcome to TutorialsPoint AWT Tutorial.");

      Button okButton = new Button("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 Window{
      private String message; 

      public MessageWindow(Frame parent, String message) { 
         super(parent);               
         this.message = message; 
         setSize(300, 300);       
         setLocationRelativeTo(parent);
         setBackground(Color.gray);
      }

      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:/ > AWT and type the following command.

D:\AWT>javac com\tutorialspoint\gui\AwtContainerDemo.java

If no error comes that means compilation is successful. Run the program using following command.

D:\AWT>java com.tutorialspoint.gui.AwtContainerDemo

Verify the following output

AWT Window

Advertisements
Advertisements