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How to close the JFrame window programmatically in Java

In this tutorial, we will learn the various methods and techniques by which a JFrame window can be closed programmatically in Java.

There are many ways by which we can close the JFrame window programmatically in Java. But yes closing a JFrame is difficult to get into the head because there are a lot of variants on how we can do it.

Some of the primary ways can be :

• Make the JFrame window invisible and keep it ready to be made visible again
• Make the JFrame Window invisible and store it in a cold storage
• We can also close the window by clicking on the cross button X. While clicking the X button at the top right corner, the JFrame window programmatically is sent to the window closing event.

So we discussed some basic ideas about how to close the JFrame window in Java. Let’s categorize them in a proper fashion:

• Final Close: When you want to get rid of the JFrame window and never want to use it again then call the dispose() function immediately after the setVisible ( false ) is called. This is done to avoid memory leaks since Java GUI is not so smart enough to do its own garbage collection

• Temporary Close: When you want to close the window for a short period of time then you can call the setVisible (false) function to make the window invisible and to bring it back call setVisible to true.
• ShortHand WindowClosingEvent handler: There are in total 3 shortcuts to execute the closing operation of a JFrame Window.

(1) If the programmer wants to dispose of the window then he/she can write this code instead to invoke the window closing event handler.

this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE)

(2) If the programmer wants to hide the window temporarily, then he/she can write this code instead to invoke the window closing event handler

this.setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE)

(3) If the programmer wants to permanently close the window call this code.

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

Hope this information will help you all a lot in learning JFrame and Java swing.

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How to Close a Window in Java

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This article has been viewed 143,298 times.

This article will show you how to close a window in Java. Closing a window is much easier using Swing’s JFrame , but it’s also doable using AWT’s Frame .

Using javax.swing.JFrame

• WindowConstants.EXIT_ON_CLOSE — Closes the frame and terminates the execution of the program.
• WindowConstants.DISPOSE_ON_CLOSE — Closes the frame and does not necessarily terminate the execution of the program.
• WindowConstants.HIDE_ON_CLOSE — Makes the frame appear like it closed by setting its visibility property to false. The difference between HIDE_ON_CLOSE and DISPOSE_ON_CLOSE is that the latter releases all of the resources used by the frame and its components.
• WindowConstants.DO_NOTHING_ON_CLOSE — Does nothing when the close button is pressed. Useful if you wish to, for example, display a confirmation dialog before the window is closed. You can do that by adding a WindowListener to the frame and overriding windowClosing method. Example of the custom close operation:

  frame.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE); frame.addWindowListener(new WindowAdapter()  @Override public void windowClosing(WindowEvent e)  // Ask for confirmation before terminating the program. int option = JOptionPane.showConfirmDialog( frame, "Are you sure you want to close the application?", "Close Confirmation", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE); if (option == JOptionPane.YES_OPTION)  System.exit(0); > > >); 

  Using java.awt.Frame

  

  

  Add window listener. Call addWindowListener method on the instance. The required argument is WindowListener . You can either implement every method of the WindowListener interface or override only the methods you need from WindowAdapter class.

  

  Dispose the window after the close button is clicked:
  Call dispose method inside windowClosing method.

  frame.addWindowListener(new WindowAdapter()  @Override public void windowClosing(WindowEvent e)  // Dispose the window after the close button is clicked. dispose(); > >); 

  frame.addWindowListener(new WindowAdapter()  @Override public void windowClosing(WindowEvent e)  // Terminate the program after the close button is clicked. System.exit(0); > >); 

  Expert Q&A

  Using WindowAdapter you don’t have to implement each and every method WindowListener contract tells us to, but only the ones we need.

  

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  Источник

  Disposing and closing windows in Java

  To determine when a Window is closing in Java, use the WindowListener, which is the listener interface for receiving window events.. Above, we have used the windowClosing() method, which is invoked when a window is in the process of being closed − The following is an example to determine when a Frame or Window is closing in Java − Example So some suggestions: The Window Closing event should be handled from the Frame itself.

  Disposing and closing windows in Java

  You can get a reference to the frame, from the source property of the event:

  class MyWindowListener extends WindowAdapter < public void windowClosing(WindowEvent e)< Frame frame = (Frame) e.getSource(); frame.dispose(); >> 

  Alternatively, since this is an anonymous class (presumably) declared within the constructor, you also have access to the enclosing instance, so you can also write it as:

  class MyFrameClass extends Frame < public MyFrameClass() < this.addWindowListener(new WindowAdapter()< public void windowClosing(WindowEvent e)< MyFrameClass.this.dispose(); >>); > > 

  Or you can make it simpler still (as your WindowListener does not have a method of its own called «dispose»):

  public void windowClosing(WindowEvent e)

  Not a stupid question. Because of the garbage collector its not such a big issue, however, there are some times when you will want to execute some cleanup when a window closes. So some suggestions:

  The Window Closing event should be handled from the Frame itself. For instance:

   this.addWindowListener(new WindowAdapter() < public void windowClosing(WindowEvent e)< //code here to perform as the window is about to close. >>); 

  And I would suggest that you create a separate class for your main method that will invoke the Frame etc.

  This is used to close Jframe with an event handler. current Jframe public class LoginForm extends JFrame < LoginForm() < //Some code for Jframe and its components. if(Condition) disposewindow(); >private void disposewindow() < WindowEvent closingEvent = new WindowEvent(LoginForm.this, WindowEvent.WINDOW_CLOSING); Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(closingEvent); >//you can can use for alternate of dispose()event and it post some event handler **Closing event** , // if we can use this closing event to open new window with conditions. //It means closing child window with closing event, get this flag in main window to make main window as Disable or Enable state 

  //In parent window @Override

   public void windowClosing(WindowEvent arg0) < // TODO Auto-generated method stub this.frame.disable(); >

  How to detect when a specific window is closed in java, 1 Answer. Sorted by: 3. Because both frameA and frameB are using the same instance of WindowListener (this), when either frame is closed, your …

  Java swing close window without exiting app

  You can use either Frame.hide() or Frame.dispose(). I would also recommend to look into JDialog or JOptionPane

  Correction: hide() is deprecated. SetVisible(false) should be used instead

  Maybe a cleaner way is just change the setDefaultCloseOperation from EXIT_ON_CLOSE to DISPOSE_ON_CLOSE :

  setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); 

  You can call setVisible(false) on the frame.

  You might also want to call setDefaultCloseOperation on the frame passing in HIDE_ON_CLOSE (info here: http://java.sun.com/javase/6/docs/api/javax/swing/JFrame.html#setDefaultCloseOperation%28int%29). That will prevent the app from going away if they user hits the «X» on the JFrame to close it.

  How to close a external application with java, 2 Answers. You can do this by executing a process to close the process that you want to close. In your comments I can see taskkill, which …

  How to find and close running Win-Process which is Java app from within other Java app?

  wmic process where caption="java.exe" get commandline,description,processid 

  to get the list of processes and their associated command line like in your screenshot. Then you get the ID of the command you want to kill and kill it with taskkill /pid xxx .

  Closing on a single window closes all the frames in java, If you want to close all frames whenever a single frame closes you can do the following: You could use a window listener and call System.exit (0); …

  Java Program to determine when a Frame or Window is closing in Java

  To determine when a Window is closing in Java, use the WindowListener, which is the listener interface for receiving window events..

  WindowListener listener = new WindowAdapter() < public void windowClosing(WindowEvent evt) < Frame frame = (Frame) evt.getSource(); System.out.println("Closing = "+frame.getTitle()); >>;

  Above, we have used the windowClosing() method, which is invoked when a window is in the process of being closed −

  public void windowClosing(WindowEvent evt)

  The following is an example to determine when a Frame or Window is closing in Java −

  Example

  package my; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import java.awt.Frame; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.awt.event.WindowListener; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextPane; import javax.swing.text.BadLocationException; import javax.swing.text.SimpleAttributeSet; import javax.swing.text.StyleConstants; public class SwingDemo < public static void main(String args[]) throws BadLocationException < JFrame frame = new JFrame("Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); WindowListener listener = new WindowAdapter() < public void windowClosing(WindowEvent evt) < Frame frame = (Frame) evt.getSource(); System.out.println("Closing = "+frame.getTitle()); >>; Container container = frame.getContentPane(); JTextPane pane = new JTextPane(); SimpleAttributeSet attributeSet = new SimpleAttributeSet(); StyleConstants.setItalic(attributeSet, true); StyleConstants.setForeground(attributeSet, Color.black); StyleConstants.setBackground(attributeSet, Color.orange); pane.setCharacterAttributes(attributeSet, true); pane.setText("This is a demo text!"); JScrollPane scrollPane = new JScrollPane(pane); container.add(scrollPane, BorderLayout.CENTER); frame.setSize(550, 300); frame.addWindowListener(listener); frame.setVisible(true); > >

  The output is as follows. The following is visible on Console −

  Output

  

  Java — close fxml window by code, javafx, If you don’t want to overspread you your controller with fxml linked methods you can do something like this: You have to give it a fx:id. …

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  Java close this window

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