import?java.awt.*;
import?java.lang.*;
import?javax.swing.*;
import?javax.swing.event.*;
import?java.awt.event.*;
import?java.lang.Math.*;
import?java.text.DecimalFormat;
public?class?Calculator
????implements?ActionListener?{?//導(dǎo)入動(dòng)作監(jiān)聽(tīng)接口
??//設(shè)計(jì)面板中的單位
??Jframe?frame;
??JTextField?textAnswer;
??JPanel?panel?panel1?panel2?panel3;
??JMenuBar?mainMenu;
??JTextField?textMemory;
??JLabel?labelMemSpace;?//labelMemSpace單純做擺設(shè)，控制面板的形狀
??JButton?buttonBk?buttonCe?buttonC;
??JButton?button[];
??JButton?buttonMC?buttonMR?buttonMS?buttonMAdd;
??JButton?buttonDot?buttonAddAndSub?buttonAdd?buttonSub?buttonMul
??????buttonDiv?buttonModsin按鈕cos按鈕tan按鈕log按鈕;
??JButton?buttonSqrt?buttonDao?buttonEqual;
??JMenu?editMenu?viewMenu?helpMenu;
??JMenuItem?copyItem?pasteI