How to programmatically close a JFrame

Question

What s the correct way to get a JFrame to close  the same as if the user had hit the X close button  or pressed Alt F4  on Windows    I have my default close operation set the way I want  via   setDefaultCloseOperation JFrame EXIT ON CLOSE     It does exactly what I want with the aforementioned controls   This question isn t about that   What I really want to do is cause the GUI to behave in the same way as a press of X close button would cause it to behave   Suppose I were to extend WindowAdaptor and then add an instance of my adaptor as a listener via addWindowListener     I would like to see the same sequence of calls through windowDeactivated    windowClosing    and windowClosed   as would occur with the X close button   Not so much tearing up the window as telling it to tear itself up  so to speak

User · Answer

If you do not want your application to terminate when a JFrame is closed, use: setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE)

instead of: setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

From the documentation:

DO_NOTHING_ON_CLOSE (defined in WindowConstants): Don't do anything; require the program to handle the operation in the windowClosing method of a registered WindowListener object.

HIDE_ON_CLOSE (defined in WindowConstants): Automatically hide the frame after invoking any registered WindowListener objects.

DISPOSE_ON_CLOSE (defined in WindowConstants): Automatically hide and dispose the frame after invoking any registered WindowListener objects.

EXIT_ON_CLOSE (defined in JFrame): Exit the application using the System exit method. Use this only in applications.

might still be useful: You can use setVisible(false) on your JFrame if you want to display the same frame again. Otherwise call dispose() to remove all of the native screen resources.

copied from Peter Lang

https://stackoverflow.com/a/1944474/3782247

User · Answer

Here would be your options   System exit 0      stop program frame dispose       close window frame setVisible false      hide window

User · Answer

Posting what was in the question body as CW answer   Wanted to share the results  mainly derived from following camickr s link   Basically I need to throw a WindowEvent WINDOW CLOSING at the application s event queue  Here s a synopsis of what the solution looks like     closing down the window makes sense as a method  so here are    the salient parts of what happens with the JFrame extending class         public class FooWindow extends JFrame           public FooWindow                 setDefaultCloseOperation JFrame EXIT ON CLOSE               setBounds 5  5  400  300       yeah yeah  this is an example  P             setVisible true                     public void pullThePlug                     WindowEvent wev   new WindowEvent this  WindowEvent WINDOW CLOSING                   Toolkit getDefaultToolkit   getSystemEventQueue   postEvent wev                       Here s how that would be employed from elsewhere -         someplace the window gets created        FooWindow fooey   new FooWindow                   and someplace else  you can close it thusly     fooey pullThePlug

User · Answer

If you really do not want your application to terminate when a JFrame is closed then   use   setDefaultCloseOperation JFrame DISPOSE ON CLOSE    instead of   setDefaultCloseOperation JFrame EXIT ON CLOSE    Here s a synopsis of what the solution looks like    myFrame dispatchEvent new WindowEvent myFrame  WindowEvent WINDOW CLOSING

User · Answer

Exiting from Java running process is very easy  basically you need to do just two simple things     Call java method System exit      at at application s quit point   For example  if your application is frame based  you can add listener WindowAdapter and and call System exit      inside its method windowClosing WindowEvent e      Note  you must call System exit      otherwise your program is error involved    Avoiding unexpected java exceptions to make sure the exit method can be called always   If you add System exit      at right point  but It does not mean that the method can be called always  because unexpected java exceptions may prevent the method from been called     This is strongly related to your programming skills       Following is a simplest sample  JFrame based  which shows you how to call exit method   import java awt event    import javax swing     public class ExitApp extends JFrame      public ExitApp              addWindowListener new WindowAdapter                    public void windowClosing WindowEvent e                        dispose               System exit 0     calling the method is a must                               public static void main String   args             ExitApp app new ExitApp          app setBounds 133 100 532 400         app setVisible true

User · Answer

Not only to close the JFrame but also to trigger WindowListener events  try this   myFrame dispatchEvent new WindowEvent myFrame  WindowEvent WINDOW CLOSING

User · Answer

If you want the GUI to behave as if you clicked the X close button then you need to dispatch a window closing event to the Window  The ExitAction from Closing An Application allows you to add this functionality to a menu item or any component that uses Actions easily   frame dispatchEvent new WindowEvent frame  WindowEvent WINDOW CLOSING

User · Answer

This answer was given by Alex and I would like to recommend it  It worked for me and another thing it s straightforward and so simple    setVisible false     you can t see me  dispose      Destroy the JFrame object

User · Answer

This examples shows how to realize the confirmed window close operation   The window has a Window adapter which switches the default close operation to EXIT ON CLOSEor DO NOTHING ON CLOSE dependent on your answer in the OptionDialog   The method closeWindow of the ConfirmedCloseWindow fires a close window event and can be used anywhere i e  as an action of an menu item  public class WindowConfirmedCloseAdapter extends WindowAdapter        public void windowClosing WindowEvent e             Object options       Yes    No             int close   JOptionPane showOptionDialog e getComponent                     Really want to close this application  n    Attention                   JOptionPane YES NO OPTION                  JOptionPane INFORMATION MESSAGE                  null                  options                  null            if close    JOptionPane YES OPTION                 JFrame e getSource    setDefaultCloseOperation                     JFrame EXIT ON CLOSE             else                JFrame e getSource    setDefaultCloseOperation                     JFrame DO NOTHING ON CLOSE                      public class ConfirmedCloseWindow extends JFrame        public ConfirmedCloseWindow              addWindowListener new WindowConfirmedCloseAdapter                private void closeWindow             processWindowEvent new WindowEvent this  WindowEvent WINDOW CLOSING

User · Answer

If by Alt-F4 or X you mean  Exit the Application Immediately Without Regard for What Other Windows or Threads are Running   then System exit      will do exactly what you want in a very abrupt  brute-force  and possibly problematic fashion   If by Alt-F4 or X you mean hide the window  then frame setVisible false  is how you  close  the window  The window will continue to consume resources memory but can be made visible again very quickly   If by Alt-F4 or X you mean hide the window and dispose of any resources it is consuming  then frame dispose   is how you  close  the window  If the frame was the last visible window and there are no other non-daemon threads running  the program will exit  If you show the window again  it will have to reinitialize all of the native resources again  graphics buffer  window handles  etc    dispose   might be closest to the behavior that you really want  If your app has multiple windows open  do you want Alt-F4 or X to quit the app or just close the active window   The Java Swing Tutorial on Window Listeners may help clarify things for you

User · Answer

You have to insert the call into the AWT message queue so all the timing happens correctly  otherwise it will not dispatch the correct event sequence  especially in a multi-threaded program   When this is done you may handle the resulting event sequence exactly as you would if the user has clicked on the  x  button for an OS suppled decorated JFrame   public void closeWindow         if awtWindow     null            EventQueue invokeLater new Runnable                 public void run                     awtWindow  dispatchEvent new WindowEvent awtWindow   WindowEvent WINDOW CLOSING

User · Answer

I have tried this  write your own code for formWindowClosing   event    private void formWindowClosing java awt event WindowEvent evt                                           int selectedOption   JOptionPane showConfirmDialog null               Do you want to exit                 FrameToClose               JOptionPane YES NO OPTION       if  selectedOption    JOptionPane YES OPTION            setVisible false           dispose          else           setDefaultCloseOperation javax swing WindowConstants DO NOTHING ON CLOSE                   This asks user whether he want to exit the Frame or Application

User · Answer

setVisible false     you can t see me  dispose      Destroy the JFrame object   Not too tricky

User · Answer

Based on the answers already provided here  this is the way I implemented it   JFrame frame  new JFrame   frame setDefaultCloseOperation JFrame EXIT ON CLOSE       frame stuffs here      frame dispatchEvent new WindowEvent frame  WindowEvent WINDOW CLOSING      The JFrame gets the event to close and upon closing  exits

User · Answer

setDefaultCloseOperation JFrame DISPOSE ON CLOSE

User · Answer

If you have done this to make sure the user can t close the window   frame setDefaultCloseOperation JFrame DO NOTHING ON CLOSE     Then you should change your pullThePlug   method to be  public void pullThePlug            this will make sure WindowListener windowClosing   et al  will be called      WindowEvent wev   new WindowEvent this  WindowEvent WINDOW CLOSING       Toolkit getDefaultToolkit   getSystemEventQueue   postEvent wev           this will hide and dispose the frame  so that the application quits by        itself if there is nothing else around       setVisible false       dispose           if you have other similar frames around  you should dispose them  too          finally  call this to really exit          i o libraries such as WiiRemoteJ need this          also  this is what swing does for JFrame EXIT ON CLOSE     System exit 0        I found this to be the only way that plays nice with the WindowListener and JFrame DO NOTHING ON CLOSE

User · Answer

Best way to close a Swing frame programmatically is to make it behave like it would when the  X  button is pressed  To do that you will need to implement WindowAdapter that suits your needs and set frame s default close operation to do nothing  DO NOTHING ON CLOSE    Initialize your frame like this   private WindowAdapter windowAdapter   null   private void initFrame          this windowAdapter   new WindowAdapter                WINDOW CLOSING event handler          Override         public void windowClosing WindowEvent e                super windowClosing e                  You can still stop closing if you want to             int res   JOptionPane showConfirmDialog ClosableFrame this   Are you sure you want to close     Close    JOptionPane YES NO OPTION               if   res    0                        dispose method issues the WINDOW CLOSED event                 ClosableFrame this dispose                                        WINDOW CLOSED event handler          Override         public void windowClosed WindowEvent e                super windowClosed e                  Close application if you want to with System exit 0                 but don t forget to dispose of all resources                 like child frames  threads                     System exit 0                            when you press  X  the WINDOW CLOSING event is called but that is it        nothing else happens     this setDefaultCloseOperation ClosableFrame DO NOTHING ON CLOSE          don t forget this     this addWindowListener this windowAdapter       You can close the frame programmatically by sending it the WINDOW CLOSING event  like this   WindowEvent closingEvent   new WindowEvent targetFrame  WindowEvent WINDOW CLOSING   Toolkit getDefaultToolkit   getSystemEventQueue   postEvent closingEvent     This will close the frame like the  X  button was pressed

[java] How to programmatically close a JFrame

copied from Peter Lang

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