java 计算器

import java.awt.BorderLayout;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;


public class BugWin extends Jframe implements ActionListener{
	final int WIN_W=430WIN_H=320;
	JTextArea area;
	JTextField field;
	JButton button;
	JPanel panelDpanelU;
	String s1=nulls2=null;
	Thread sendE;
	public BugWin（）{
		panelD=new JPanel（）;
		panelU=new JPanel（）;
		button=new JButton（“提交“）;
		area=new JTextArea（“请输入内容“）;
		field=new JTextField（20）;
		panelU.add（new JLabel（“标题：“））;
		panelU.add（field）;
		this.add（panelUBorderLayout.NORTH）;
		this.add（new JScrollPane（area））;
		panelD.add（button）;
		this.add（panelDBorderLayout.SOUTH）;
		button.addActionListener（this）;
		double width = Toolkit.getDefaul

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2012-02-14 13:43  calculator2.5\
     文件         283  2010-12-06 17:35  calculator2.5\.classpath
     文件         389  2010-12-06 17:33  calculator2.5\.project
     目录           0  2012-02-14 13:43  calculator2.5\bin\
     文件         575  2012-02-14 13:35  calculator2.5\bin\BugWin$MyThread.class
     文件        2465  2012-02-14 13:35  calculator2.5\bin\BugWin.class
     文件        6902  2012-02-14 13:35  calculator2.5\bin\Cal.class
     文件        5672  2012-02-14 13:39  calculator2.5\bin\CalWin.class
     文件        2133  2012-02-14 13:37  calculator2.5\bin\Mailbug.class
     文件        6952  2012-02-14 13:35  calculator2.5\bin\panelCommon.class
     目录           0  2012-02-14 13:43  calculator2.5\lib\
     文件      462098  2010-12-04 18:16  calculator2.5\lib\mail.jar
     目录           0  2012-02-14 13:43  calculator2.5\src\
     文件        1447  2010-12-06 20:13  calculator2.5\src\BugWin.java
     文件        5163  2010-12-06 22:13  calculator2.5\src\Cal.java
     文件        4120  2012-02-14 13:39  calculator2.5\src\CalWin.java
     文件        1307  2012-02-14 13:37  calculator2.5\src\Mailbug.java
     文件        7288  2010-12-19 13:48  calculator2.5\src\panelCommon.java
     文件      480022  2012-02-14 13:42  计算器.jar
     文件          66  2012-02-19 08:59  calculator2.5\教程说明见这里.txt
     文件          66  2012-02-19 08:59  教程说明见这里.txt