JAVA语言超市收银系统课程设计

适合需要交课程设计的初学者超市管理系统，有登陆框，收银员，有VIP的优惠打折处理，能够将同样的商品自动累加。文件读取，没有用到数据库

import java.awt.Font;
import java.text.SimpleDateFormat;
import java.util.*;
import javax.swing.*;


public class clock extends JPanel {
	private JLabel label = new JLabel（““）;

	public clock（） {
		label.setFont（new Font（““ Font.PLAIN 24））;
		this.add（label）;

		class ClockThread extends Thread {
			Date date = new Date（）;

			Calendar calendar = new GregorianCalendar（）;

			public ClockThread（） {
				calendar.setTime（date）;
			}

			public void run（） {
				while （true） {
					SimpleDateFormat dateFormat = new SimpleDateFormat（
							“yyyy-MM-dd HH:mm:ss“）;
					calendar.set（Calendar.SECOND
							calendar.get（Calendar.SECOND） + 1）;
					label.setText（dateFormat.format（calendar.getTime（）））;
					try {
						Thread.sleep（1000）;
					} catch （InterruptedException e） {
						e.printStackTrace（）;
					}
				}
			}
		}
		new ClockThread（）.start（）;
	}
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件        232  2008-11-01 23:58  SupermaketSystem\.classpath

     文件        392  2015-05-30 17:52  SupermaketSystem\.project

     文件       1433  2015-05-30 17:54  SupermaketSystem\bin\clock$1ClockThread.class

     文件        788  2015-05-30 17:54  SupermaketSystem\bin\clock.class

     文件       1967  2015-05-30 17:54  SupermaketSystem\bin\Data.class

     文件       5169  2015-05-30 17:54  SupermaketSystem\bin\DataManagement.class

     文件       2054  2015-05-30 17:54  SupermaketSystem\bin\draw$DrawJDialog.class

     文件       1014  2015-05-30 17:54  SupermaketSystem\bin\draw$DrawPanel.class

     文件        747  2015-05-30 17:54  SupermaketSystem\bin\draw.class

     文件       1741  2015-05-30 17:54  SupermaketSystem\bin\judge.class

     文件        614  2015-05-30 17:54  SupermaketSystem\bin\land.class

     文件       3890  2015-05-30 17:54  SupermaketSystem\bin\landframe.class

     文件        609  2015-05-30 17:54  SupermaketSystem\bin\mainview$1.class

     文件      12541  2015-05-30 17:54  SupermaketSystem\bin\mainview.class

     文件       2478  2015-05-30 17:54  SupermaketSystem\bin\sellcount.class

     文件         36  2015-05-30 17:39  SupermaketSystem\denglu.txt

     文件       2229  2015-05-30 17:55  SupermaketSystem\record.txt

     文件        902  2007-08-27 23:13  SupermaketSystem\src\clock.java

     文件       1151  2007-08-24 21:36  SupermaketSystem\src\Data.java

     文件       4788  2015-05-30 17:48  SupermaketSystem\src\DataManagement.java

     文件       1812  2007-08-27 23:03  SupermaketSystem\src\draw.java

     文件       1051  2007-08-24 22:22  SupermaketSystem\src\judge.java

     文件       2722  2007-09-18 22:01  SupermaketSystem\src\land.java

     文件      14325  2007-09-19 13:43  SupermaketSystem\src\mainview.java

     文件       1874  2007-09-11 23:24  SupermaketSystem\src\sellcount.java

     文件         93  2007-09-18 22:04  SupermaketSystem\supermarket.txt

     文件         28  2007-08-21 20:53  SupermaketSystem\vip.txt

     目录          0  2015-05-30 17:54  SupermaketSystem\bin

     目录          0  2008-11-04 13:07  SupermaketSystem\src

     目录          0  2008-11-02 00:09  SupermaketSystem

............此处省略3个文件信息