confirmdialog.java

用java界面模拟操作系统内存分配与回收的功能。直观易懂。

import  java.awt.*;
import  java.awt.event.*;

public  class ConfirmDialog extends Dialog implements ActionListener 
{
	private Button okay = new Button ("确定");
	private Label lab1 = new Label (" 内存中已没有足够的连续的空间");
	private Label lab2 = new Label (" 来存放作业，请释放一些空间以");
	private Label lab3 = new Label (" 装入新的作业");


	private class WindowCloser extends WindowAdapter  {
		public void windowClosing (WindowEvent we)  {
			ConfirmDialog.this.hide();
		}
	}

	public ConfirmDialog (Frame parent) {
		super (parent, "Please Confirm", true);
		setup ();
		okay.addActionListener (this);
		addWindowListener (new WindowCloser ());
		setSize (100, 200);
		//setResizable (false);
		pack ();  show ();
	}

	private void setup () {
		Panel buttons = new Panel ();
		buttons.setLayout (new GridLayout (1, 3));
		buttons.add (new Label ());
		buttons.add (okay);
		buttons.add (new Label ());
		Panel cen = new Panel ();
		cen.setLayout (new GridLayout (3, 1));
		cen.add (lab1);
		cen.add (lab2);
		cen.add (lab3);
		setLayout (new BorderLayout ());
		add ("Center", cen);
		add ("South", buttons);
	}

	public void actionPerformed (ActionEvent ae)  {
		if (ae.getSource() == okay)
			hide();
	}
}