messagedialogtest.java

awt图形界面的生成

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;

public class MessageDialogTest extends Applet {
	public void init() {
		setLayout(new BorderLayout());
		add(new MessageDialogLauncher(this), "Center");
	}
}
class MessageDialogLauncher extends Panel 
							implements DialogClient, 
										ActionListener {
	private Applet applet;
	private Button messageDialogButton;
	private MessageDialog  messageDialog;
	private Image image = null;
	private Checkbox modal = new Checkbox("modal");

	public MessageDialogLauncher(Applet applet) {
		this.applet = applet;

		add(modal);

		add(messageDialogButton  = 
				new Button("Launch Message Dialog"));

		messageDialogButton.addActionListener (this);
	}
	public void actionPerformed(ActionEvent event) {
		Image image = applet.getImage(applet.getCodeBase(),
									"gifs/information.gif");
		if(messageDialog == null) {
			messageDialog = new MessageDialog(
						Util.getFrame(this), this,
						"Example Message Dialog", 
						"This is an example of a message dialog.",
						image, modal.getState());
		}
		else {
			if(modal.getState()) 	messageDialog.setModal(true);
			else					messageDialog.setModal(false);
		}
		messageDialog.setVisible(true);
	}
	public void dialogDismissed(Dialog d) {
		applet.showStatus("MessageDialog Dismissed");
	}
	public void dialogCancelled(Dialog d) {
		applet.showStatus("Message Dialog Cancelled");
	}
}