java Swing实现计算器源码

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Calculator extends WindowAdapter implements ActionListener KeyListener 
{
    double dResult=0;
    double dNowInput=0;
    double dMemory;
    int  n=0;
    int  nOperation=1;
    int  nBitsNum=0;
    char ch;
    boolean alreadyHaveDot=false;
    boolean keyAvailable=true;
    boolean alreadyClickedEqueal=false;
    boolean isTempNowInput=false;
    
    Jframe f;
    Panel p1p2p3p4p5p6;
    TextField tf1tf2;
    Button b1b2b3b4b5b6b7b8b9b0;
    Button bDivbSqrtbMultibMinusbPercentbPlusbReciprocalbEqualbDotbNegative;
    Button bBackspacebCEbCbMRbMSbMCbM;
    
    public void display（） 
    {
        f=new Jframe（“Calculator“）;
        f.setForeground（Color.BLUE）;
        f.setSize（290223）;
        f.setLocation（220220）;
        f.setBackground（Color.PINK）;
        f.setResizable（false）;
        f.setLayout（new BorderLayout（44））;
        
        
        p1=new Panel（new GridLayout（1355））;
        p2=new Panel（new GridLayout（4555））;
        p3=new Panel（new GridLayout（5155））;
        p4=new Panel（new FlowLayout（））;
        p5=new Panel（new FlowLayout（））;
        p6=new Panel（new FlowLayout（））;
        p4.add（p1）;
        p4.add（p2）;
        
        tf1=new TextField（35）;
        tf1.setText（“0.“）;
        tf1.setEditable（false）;
        p5.add（tf1）;
        f.add（p5BorderLayout.NORTH）;
        f.add（p4BorderLayout.CENTER）;
        f.add（p3BorderLayout.WEST）;
        tf1.addKeyListener（this）;
        
        
        b1=new Button（“1“）;
        b2=new Button（“2“）;
        b3=new Button（“3“）;
        b4=new Button（“4“）;
        b5=new Button（“5“）;
        b6=new Button（“6“）;
        b7=new Button（“7“）;
        b8=new Button（“8“）;
        b9=new Button（“9“）;
        b0=new Button（“0“）;
        
        b1.setForeground（Color.BLUE）;
        b2.setForeground（Color.BLUE）;
        b3.setForeground（Color.BLUE）;
        b4.setForeground（Color.BLUE）;
        b5.setForeground（Color.BLUE）;
        b6.setForeground（Color.BLUE）;
        b7.setForeground（Color.BLUE）;
        b8.setForeground（Color.BLUE）;
        b9.setForeground（Color.BLUE）;
        b0.setForeground（Color.BLUE）;
        
        /*add（b1）;
        add（b2）;
        add（b3）;
        add（b4）;
        add（b5）;
        add（b6）;
        add（b7）;
        add（b8）;
        add（b9）;
        add（b0）;*/
        b1.addActionListener（this）;
        b2.addActionListener（this）;
        b3.addActionListener（this）;
        b4.addActionListener（this）;
        b5.addActionListener（this）;
        b6.addActionListener（this）;
        b7.addActionListener（this）;
        b8.addActionListener（this）;
        b9.addActionListener（this）;
        b0.addActionListener（this）;
        b1.addKeyListener（this）;
        b2.addKeyListener（this）;
        b3.addKeyListener（this）;
        b4.addKeyListener（th