How to quit or exit slave JWindow that was created from a master JWindow in Java?
How can i exit only they new MainGame that i created from Main? Wher开发者_JAVA技巧e Main is having an original layer of game. And the MainGame was a dialog window (such as modal windows).
Main.java: (main code)
public class Main extends JWindow
{
private static JWindow j;
public static MainGame mp;
public static void main(String[] args)
{
new Thread(new Runnable()
{
public void run()
{
mp = new MainGame();
mp.runit();
//mp.stopit();
}
}).start();
j = new Main();
j.setVisible(true);
}
}
MainGame.java: (this was extended by Main, and i would like to quite this only).
public class MainGame extends JWindow
{
private static JWindow j;
public MainGame()
{
// some GUI ...
}
public static void runit()
{
j = new MainGame();
j.setVisible();
}
}
1) better would be implements CardLayout, as create Top-Level Container
for new Window
, then you'll only to switch betweens Cards
2) don't create lots of Top-Level Container
on Runtime, because there are still in JVM memory untill current instance exist,
create required number of and re-use that, to avoiding possible memory lacks
then you have to call
setVisible(false)
andsetVisible(true)
JWindow
missed methods for settingsetDefaultCloseOperation(Whatever);
3) if you'll create constructor public JWindow(Frame owner), then you'll call directly
SwingUtilities.getAccessibleChildrenCount() and SwingUtilities.getWindowAncestor()
import javax.swing.*;
import java.awt.*;
public class Testing {
private JFrame f = new JFrame("Main Frame");
private JWindow splashScreen = new JWindow();
public Testing() {
splashScreen = new JWindow(f);
splashScreen.getContentPane().setLayout(new GridBagLayout());
JLabel label = new JLabel("Splash Screen");
label.setFont(label.getFont().deriveFont(96f));
splashScreen.getContentPane().add(label, new GridBagConstraints());
splashScreen.pack();
splashScreen.setLocationRelativeTo(null);
splashScreen.setVisible(true);
new Thread(new Runnable() {
@Override
public void run() {
readDatabase();
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
createAndShowGUI();
}
});
}
}).start();
}
public void readDatabase() {
//simulate time to read/load data - 10 seconds?
try {
Thread.sleep(2000);
} catch (Exception e) {
e.printStackTrace();
}
}
public void createAndShowGUI() {
JLabel label = new JLabel("My Frame");
label.setFont(label.getFont().deriveFont(96f));
f.add(label);
f.setLocationRelativeTo(null);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.pack();
f.setVisible(true);
System.out.println("JFrame getAccessibleChildrenCount count -> "
+ SwingUtilities.getAccessibleChildrenCount(f));
System.out.println("JWindow getParent -> "
+ SwingUtilities.getWindowAncestor(splashScreen));
splashScreen.dispose();
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
Testing t = new Testing();
}
});
}
}
I did not go really into your design. but there is 'j.dispose();'. this should work. here is the java documentation.
notice:
- dispose(); - deletes the window from memory.
- setVisibilty(false); - just hides it from the screen.
- You can override the 'dispose()' function to do some stuff while the widow is closing (updating scores if its a game) but at the end of the overriden function you have to call 'super.dispose();' so the function of the class Window is called.
And the MainGame was a dialog window
But thats not what your code uses. You use a JWindow.
You should be using a JDialog for a modal window. Then you just dispose() the window.
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