First Swing steps - SimpleGrid

10

SimpleGrid

SimpleGrid.java

import java.awt.event.*;
import java.awt.*;
public class SimpleGrid {
public static void main(String[] args) {
ApplicationWindow appwin = new ApplicationWindow("Application");
appwin.setVisible(true);
}
static class ApplicationWindow extends Frame {
ApplicationWindow(String name) {
super(name);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
Menu filemenu = new Menu("File", true);
MenuItem quit = new MenuItem("Quit");
quit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
filemenu.add(quit);
MenuBar menubar = new MenuBar();
menubar.add(filemenu);
setMenuBar(menubar);
setLayout(new GridLayout(3, 3, 2, 2));
for( int i = 1; i < 10; i++ )
add(new Button(Integer.toString(i)));
pack();
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
int width = getSize().width;
int height = getSize().height;
int x = (screenSize.width - width) / 2;
int y = (screenSize.height - height) / 3;
setLocation(x, y);
setResizable(true);
}
}
}

$ javac SimpleGrid.java
$ java SimpleGrid

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