How to close a GUI when I push a JButton

Question

Does anyone know how to make a jbutton close a gui  I think it is like System CLOSE 0   but that didnt work  it also could be exitActionPerformed evt    but that didn t work either  just the line of code will work   EDIT  never mind guys  the answer was System exit 0    thanks for the help though

User · Answer

See JFrame setDefaultCloseOperation DISPOSE ON CLOSE 1   You might also use EXIT ON CLOSE  but it is better to explicitly clean up any running threads  then when the last GUI element becomes invisible  the EDT  amp  JRE will end   The  button  to invoke this operation is already on a frame     See this answer to How to best position Swing GUIs  for a demo  of the DISPOSE ON CLOSE functionality The JRE will end after all 3 frames are closed by clicking the X button

User · Answer

Add your button   JButton close   new JButton  Close      Add an ActionListener   close addActionListner new CloseListener       Add a class for the Listener implementing the ActionListener interface and override its main function   private class CloseListener implements ActionListener       Override     public void actionPerformed ActionEvent e              DO SOMETHING         System exit 0             This might be not the best way  but its a point to start  The class for example can be made public and not as a private class inside another one

User · Answer

JButton close   new JButton  Close    close addActionListener this   public void actionPerformed ActionEvent closing        getSource   checks for the source of clicked Button   compares with the name of button in which here is close        if closing getSource    close     System exit 0         This exit Your GUI      Some Answers were asking for  override which is overriding the method the super class or the parent class and creating different objects and etc which makes the answer too long   Note   we just need to import java awt    and java swing    and Adding this command   class className implements actionListener

User · Answer

Create a method and call it to close the JFrame  for example   public void CloseJframe        super dispose

User · Answer

By using System exit 0   you would close the entire process  Is that what you wanted or did you intend to close only the GUI window and allow the process to continue running   The quickest  easiest and most robust way to simply close a JFrame or JPanel with the click of a JButton is to add an actionListener to the JButton which will execute the line of code below when the JButton is clicked   this dispose      If you are using the NetBeans GUI designer  the easiest way to add this actionListener is to enter the GUI editor window and double click the JButton component  Doing this will automatically create an actionListener and actionEvent  which can be modified manually by you

User · Answer

You may use Window dispose   method  to release all of the native screen resources  subcomponents  and all of its owned children   The System exit 0  will terminates the currently running Java Virtual Machine

User · Answer

In Java 8  you can use Lambda expressions to make it simpler   Close application  JButton btnClose   new JButton  Close    btnClose addActionListener e - gt  System exit 0      Close window  JButton btnClose   new JButton  Close    btnClose addActionListener e - gt  this dispose

[java] How to close a GUI when I push a JButton?

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