extraguidemo4.java

JAVA程序设计课程中各章节的程序实例。

/**
*A dialog demonstration program
*Dialogs have several restrictions as follows:
*1.They cannot have menus or be resized
*2.They must be owned by a parent window in order to exist
*Since dialogs are designed for user input,they can be designed either 
* as model or non_model at creation time.Model dialog are to be explicitly
* closed,as they do not allow simutaneous navigation in two different
* windows whereas non-model dialogs do
*AWT provides two types of dialogs:Generic dialog and file dialog
*Note that the applet gets disabled when the frame window is open
*2005.1.11. xhcprince
*/

import java.applet.*;
import java.awt.*;

public class extraGUIDemo4 extends Applet
{
	public void init()
	{
		Myframe f = new Myframe("My window");
		f.setSize(200,200);
		f.init();
		f.setVisible(true);
	}
}

class Myframe extends Frame
{
	Myframe(String name)
	{
		super(name);
	}
	
	public void init()
	{
		Dialog d = new Dialog(this,"first dialog",true);//the boolean type is for model or 
		d.setLayout(new FlowLayout(FlowLayout.CENTER));	// non_model
		/*Generic dialog constructor:Dialog(Frame,String,boolean)*/		
		TextField tf = new TextField(30);
		
		d.add(tf);
		d.add(new Button("OK"));
		d.setSize(200,175);
		d.setVisible(true);
	}
}
/*
<applet code = "extraGUIDemo4.class" width = 300 height = 300>
</applet>
*/