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1、import javax.swing.*;/ 把 javax包里面的swing包里面的 所有东西 引进来import java.awt.*;/ 导入awt包里的所有java类import java.awt.event.*;/导入包eventimport java.text.DecimalFormat;/ 处理文本、日期、数字和消息的类和接口import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.GregorianCalendar;import java.
2、awt.BasicStroke;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import java.awt.Font;import java.awt.Graphics;import java.awt.Graphics2D;import java.awt.GridLayout;import java.awt.Image;import java.awt.Toolkit;import java.awt.event.ActionEvent;import java.awt.event.Actio
3、nListener;import java.awt.geom.Ellipse2D;import java.awt.geom.Line2D;import java.awt.geom.Point2D;public class biaozhunjisuanqi extends JFrame implements ActionListener / public代表该类公有/class声明一个类/ biaozhunjisuanqi为类名/ extends 是继承类/implements代表实现接口/窗体名称biaozhunjisuanqi继承JFrame类和ActionListener接口，并实现pub
4、lic void actionPerformed(ActionEvent e)方法private static final long serialVersionUID = 1L;/ serialVersionUID相当于java类的身份证, 默认为1L, serialVersionUID作用是序列化时保持版本的兼容性，即在版本升级时反序列化仍保持对象的唯一性private JPanel jContentPane = null; / 创建面板对象, null代表为这些变量赋初值为空，即不分配内存空间，变量不指向任何地址。private是访问控制符，代表这些变量的访问级别为私有，私有级别只能在当前
5、类中进行访问, 这些（JPanel 、JTextArea 、JPanel、 JButton ）是java中AWT（包）中的类，用能进行桌面级应用程序的开发，就像平时用的word，上面有各种文本框，菜单栏，工具栏按钮等等，这些都是对象private JPanel jPanel = null; /JPanel 作为一个容器，可以包容一些组件，然后将这个 JPanel 对象作为一个组件添加到另一个容器 (称作父容器) 中private JButton jButton = null; /9 JButton是用户进行计算时主要的使用工具，一般为其添加actionPerformed事件。private J
6、Button jButton1 = null;/ (/)private JButton jButton2 = null;/(sqrt)private JButton jButton3 = null;/(4)private JButton jButton4 = null;/(5)private JButton jButton5 = null;/(6)private JButton jButton6 = null;/(*)private JButton jButton7 = null;/(%)private JButton jButton8 = null;/(1)private JButton j
7、Button9 = null;/(7)private JButton jButton10 = null;/(8)private JButton jButton11 = null;/(2)private JButton jButton12 = null;/(3)private JButton jButton13 = null;/(-)private JButton jButton14 = null;/(1/x)private JButton jButton15 = null;/(0)private JButton jButton16 = null;/(+/-)private JButton jB
8、utton17 = null;/(.)private JButton jButton18 = null;/(+)private JButton jButton19 = null;/(=)private JTextField jTextField = null;/ JTextField是一个的文本框private JTextField textMemory= null;/作为输入M用private JButton jButton20 = null;/(MC)private JButton jButton21 = null;/(MR)private JButton jButton22 = null
9、;/(MS)private JButton jButton23 = null;/(M+)private JButton jButton24 = null;/(Backspace)private JButton jButton25 = null;/(CE)private JButton jButton26 = null;/(C)double memoryd; /使用内存中存储的数字int memoryi;/科学计算器按钮private JButton jButton31 = null;/(十六进制)private JButton jButton32 = null;/(sin)private JB
10、utton jButton33 = null;/(cos)private JButton jButton34 = null;/(十进制)private JButton jButton35 = null;/(tan)private JButton jButton36 = null;/(弧度)private JButton jButton37 = null;/(八进制)private JButton jButton38 = null;/(X2)private JButton jButton39 = null;/(X3)private JButton jButton40 = null;/(二进制)p
11、rivate JButton jButton41 = null;/(Xy)private JButton jButton42 = null;/(n!)private JButton jButton43 = null;/(Pi)private JButton jButton44 = null;/(ln)private JButton jButton45 = null;/(log10)/A-Fprivate JButton jButton46 = null;/(A)private JButton jButton47 = null;/(B)private JButton jButton48 = nu
12、ll;/(C)private JButton jButton49 = null;/(D)private JButton jButton50 = null;/(E)private JButton jButton51 = null;/(F)private JPanel jPanel1 = null;private JPanel jContentPane1 = null;private String str=; /声明私有字符串变量strprivate double dataone;/变量名用来存储运算的数据private char Operator=A; /存放运算符private boolean
13、 pointIsTyped=false; /判断输入的数据是否是小数private JMenuBar jJMenuBar = null;private JMenu jMenu = null;/ JMenu定义菜单 编辑键private JMenuItem jMenuItem = null;/ JMenuItem菜单中项的实现 复制（Ctrl+C）private JMenuItem jMenuItem1 = null;/粘贴（Ctrl+V）private JMenu jMenu1 = null;/定义查看菜单private JMenuItem jMenuItem3 = null;/帮助主题pri
14、vate JMenuItem jMenuItem4 = null;/关于计算器private JMenu jMenu2 = null;/定义帮助菜单private JMenuItem jMenuItem5 = null;/标准型private JMenuItem jMenuItem6 = null;/科学型private JMenuItem jMenuItem7 = null;/勾股定理private JMenuItem jMenuItem8 = null;/解一元二次方程DecimalFormat df;/保留小数位数private JButton getJButton() /使用priva
15、te JButton getJButton()方法添加按钮并给按钮命名if (jButton = null) jButton = new JButton();jButton.setText(9);jButton.setFont(new Font(楷体, Font.BOLD, 30);/ 使用jButton.setFont(new Font(楷体, Font.BOLD, 30)方法设置按钮的字体jButton.setForeground(new Color(250,0,0); /使用方法设置按钮的字体颜色红色、绿色和蓝色jButton.setFocusable(false);jButton.addActionListener(new ActionListener() /相
