Java swing application close one window and open another when button is clicked

Question

I have a netbeans Java application that should display a JFrame  class StartUpWindow extends JFrame  with some options when the application is launched  then the user clicks a button and that JFrame should be closed and a new one  class MainWindow  should be opened   So how do I do this correctly  I obviously set a click handler on the button in StartupWindow but what do I put in this handler so that I can close the StartUpWindow and open the MainWindow  It seems that threading comes into this too as every window seems to have their own thread   or are threading issues automatically handled by JFrames themselves

User · Answer

You can hide a part of JFrame that contains the swing controls which you want on another JFrame.

When the user clicks on a Jbutton the JFrame width increases and when he clicks on another same kind of Jbutton the JFrame comes to the default size.

  JFrame myFrame = new JFrame("");
  JButton button1 = new JButton("Basic");
  JButton button2 = new JButton("More options");
 // actionPerformed block code for button1 (Default size)  
 myFrame.setSize(400, 400);
//  actionPerformed block code for button2 (Increase width)
 myFrame.setSize(600, 400);

User · Answer

Call below method just after calling the method for opening new window  this will close the current window   private void close        WindowEvent windowEventClosing   new WindowEvent this  WindowEvent WINDOW CLOSING       Toolkit getDefaultToolkit   getSystemEventQueue   postEvent windowEventClosing       Also in properties of JFrame  make sure defaultCloseOperation is set as DISPOSE

User · Answer

Here is an example       StartupWindow java  import java awt event ActionEvent  import java awt event ActionListener  import javax swing JButton  import javax swing JFrame  import javax swing SwingUtilities    public class StartupWindow extends JFrame implements ActionListener       private JButton btn       public StartupWindow                 super  Simple GUI            setDefaultCloseOperation JFrame EXIT ON CLOSE            btn   new JButton  Open the other JFrame             btn addActionListener this           btn setActionCommand  Open            add btn           pack                 Override     public void actionPerformed ActionEvent e                String cmd   e getActionCommand             if cmd equals  Open                          dispose                new AnotherJFrame                         public static void main String   args                SwingUtilities invokeLater new Runnable                  Override             public void run                                 new StartupWindow   setVisible true                                        AnotherJFrame java  import javax swing JFrame  import javax swing JLabel   public class AnotherJFrame extends JFrame       public AnotherJFrame                 super  Another GUI            setDefaultCloseOperation JFrame EXIT ON CLOSE            add new JLabel  Empty JFrame             pack            setVisible true

User · Answer

final File open   new File  PicDic exe            if  open exists      true                if  Desktop isDesktopSupported                      javax swing SwingUtilities invokeLater new Runnable                          public void run                             try                               Desktop getDesktop   open open                             catch  IOException ex                                return                                                                                       javax swing SwingUtilities invokeLater new Runnable                          public void run                               DocumentEditorView this getFrame   dispose                            System exit 0                                                            else                   JOptionPane showMessageDialog this getFrame     Desktop is not support to open editor n You should try manualy                            else               JOptionPane showMessageDialog this getFrame     PicDic exe is not found                  you can start another apps by using it and can slit your whole project in many apps  it  will work lot

User · Answer

This is obviously the scenario where you should be using CardLayout  Here instead of opening two JFrame  what you can do is simply change the JPanels using CardLayout   And the code that is responsible for creating and displaying your GUI should be inside the SwingUtilities invokeLater       method for it to be Thread Safe  For More Info you have to read about Concurrency in Swing   But if you want to stick to your approach  here is a Sample Code for your Help   import java awt    import java awt event     import javax swing     public class TwoFrames       private JFrame frame1  frame2      private ActionListener action      private JButton showButton  hideButton       public void createAndDisplayGUI                 frame1   new JFrame  FRAME 1            frame1 setDefaultCloseOperation JFrame EXIT ON CLOSE                 frame1 setLocationByPlatform true            JPanel contentPane1   new JPanel            contentPane1 setBackground Color BLUE            showButton   new JButton  OPEN FRAME 2            hideButton   new JButton  HIDE FRAME 2             action    new ActionListener                         public void actionPerformed ActionEvent ae                                JButton button    JButton  ae getSource                                           If this button is clicked  we will create a new JFrame                     and hide the previous one                                      if  button    showButton                                        frame2   new JFrame  FRAME 2                        frame2 setDefaultCloseOperation JFrame EXIT ON CLOSE                             frame2 setLocationByPlatform true                        JPanel contentPane2   new JPanel                        contentPane2 setBackground Color DARK GRAY                        contentPane2 add hideButton                       frame2 getContentPane   add contentPane2                       frame2 setSize 300  300                       frame2 setVisible true                       frame1 setVisible false                                                           Here we will dispose the previous frame                      show the previous JFrame                                      else if  button    hideButton                                        frame1 setVisible true                       frame2 setVisible false                       frame2 dispose                                                        showButton addActionListener action           hideButton addActionListener action            contentPane1 add showButton            frame1 getContentPane   add contentPane1           frame1 setSize 300  300           frame1 setVisible true             public static void main String    args                              Here we are Scheduling a JOB for Event Dispatcher            Thread  The code which is responsible for creating            and displaying our GUI or call to the method which             is responsible for creating and displaying your GUI            goes into this SwingUtilities invokeLater      thingy                      SwingUtilities invokeLater new Runnable                         public void run                                 new TwoFrames   createAndDisplayGUI                                        And the output will be      and

User · Answer

You can call dispose   on the current window and setVisible true  on the one you want to display

User · Answer

Use this dispose for current window to close and next window setVisible true  to show next window behind button property ActionPerformed   Example is shown below in pic for your help

[java] Java swing application, close one window and open another when button is clicked

Examples related to java

Examples related to swing