How to position the form in the center screen

Question

I m a  Net developer but somehow I was task to create a simple application in java for some extra reason  I was able to create that application but my problem is how can i center the form in the screen when the application is launched    Here is my code   private void formWindowActivated java awt event WindowEvent evt                Get the size of the screen         Dimension dim   Toolkit getDefaultToolkit   getScreenSize                Determine the new location of the window         int w   this getSize   width          int h   this getSize   height          int x    dim width-w  2          int y    dim height-h  2              Move the window         this setLocation x  y       The code above works fine but the problem is I ve seen the form moving from the topleft most to center screen  I also tried adding that code in formWindowOpened event and still shows same action  Is there a better way for this  Just like in  NET Application there is a CenterScreen Position  Or if the code above is correct  on what Event will i put it   Thanks for reading this

User · Answer

Actually  you dont really have to code to make the form get to centerscreen   Just modify the properties of the jframe   Follow below steps to modify    right click on the form change FormSize policy to - generate resize code then edit the form position X -200 Y- 200   You re done  Why take the pain of coding

User · Answer

Using this Function u can define your won position  setBounds 500  200  647  418

User · Answer

Simply set location relative to null after calling pack on the JFrame  that s it   e g      JFrame frame   new JFrame  FooRendererTest      frame setDefaultCloseOperation JFrame EXIT ON CLOSE     frame getContentPane   add mainPanel      or whatever      frame pack      frame setLocationRelativeTo null           this will center your app       frame setVisible true

User · Answer

public class Example extends JFrame    public static final int WIDTH   550   Any Size public static final int HEIGHT   335   Any Size  public Example           init        private void init          try           UIManager                  setLookAndFeel  com sun java swing plaf nimbus NimbusLookAndFeel             SwingUtilities updateComponentTreeUI this           Dimension dimension   Toolkit getDefaultToolkit   getScreenSize            setSize WIDTH  HEIGHT            setLocation  int   dimension getWidth     2 - WIDTH   2                    int   dimension getHeight     2 - HEIGHT   2            catch  ClassNotFoundException e            e printStackTrace          catch  InstantiationException e            e printStackTrace          catch  IllegalAccessException e            e printStackTrace          catch  UnsupportedLookAndFeelException e            e printStackTrace

User · Answer

Change this   public FrameForm          initComponents         to this   public FrameForm         initComponents        this setLocationRelativeTo null

User · Answer

i hope this will be helpful   put this on the top of source code    import java awt Toolkit    and then write this code    private void formWindowOpened java awt event WindowEvent evt                                          int lebar   this getWidth   2      int tinggi   this getHeight   2      int x    Toolkit getDefaultToolkit   getScreenSize   width 2 -lebar      int y    Toolkit getDefaultToolkit   getScreenSize   height 2 -tinggi      this setLocation x  y       good luck

User · Answer

The following example centers a frame on the screen   package com zetcode   import java awt Dimension  import java awt EventQueue  import java awt GraphicsEnvironment  import java awt Point  import javax swing JFrame    public class CenterOnScreen extends JFrame        public CenterOnScreen              initUI               private void initUI              setSize 250  200           centerFrame            setTitle  Center            setDefaultCloseOperation JFrame EXIT ON CLOSE              private void centerFrame                  Dimension windowSize   getSize                GraphicsEnvironment ge   GraphicsEnvironment getLocalGraphicsEnvironment                Point centerPoint   ge getCenterPoint                 int dx   centerPoint x - windowSize width   2              int dy   centerPoint y - windowSize height   2                  setLocation dx  dy               public static void main String   args            EventQueue invokeLater new Runnable                  Override             public void run                     CenterOnScreen ex   new CenterOnScreen                    ex setVisible true                                              In order to center a frame on a screen  we need to get the local  graphics environment  From this environment  we determine the center point  In conjunction with the frame size  we manage to center the frame  The setLocation   is the method that moves the frame to the central position   Note that this is actually what the setLocationRelativeTo null  does   public void setLocationRelativeTo Component c           target location     int dx   0  dy   0         target GC     GraphicsConfiguration gc   getGraphicsConfiguration NoClientCode        Rectangle gcBounds   gc getBounds         Dimension windowSize   getSize            search a top-level of c     Window componentWindow   SunToolkit getContainingWindow c       if   c    null      componentWindow    null             GraphicsEnvironment ge   GraphicsEnvironment getLocalGraphicsEnvironment            gc   ge getDefaultScreenDevice   getDefaultConfiguration            gcBounds   gc getBounds            Point centerPoint   ge getCenterPoint            dx   centerPoint x - windowSize width   2          dy   centerPoint y - windowSize height   2                  setLocation dx  dy

User · Answer

Try using this   this setBounds x y w h

User · Answer

If you use NetBeans IDE right click form then   Properties - Code -  check out Generate Center

[java] How to position the form in the center screen?

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