java计算器代码.doc

//计算器
importjava.awt.*;
importjava.awt.event.*;
importjavax.swing.*;
publicclassCalculatorextendsWindowAdapterimplementsActionListener{

JFrameframe;
JTextFieldshow;
JButtonbc,ce,c,ab,jia,jian,cheng,chu,equ,point,sqrt,zf,bfh,ds;
//退格，复位，清空，关于，加，减，乘，除，等，点，2，加减，百分之，倒数
JButtonb[]=newJButton[10];//保存数字
JDialogabout;
finalintlength=30;
inti=0,j=0,action=0,p=0;//记录数字键连续时间次数
doublenum=0,getValue;//记录计算结果的值,保存值

publicCalculator(){
frame=newJFrame("计算器");
frame.addWindowListener(this);
frame.setSize(360,230);
frame.setLocation(380,260);
frame.setLayout(newFlowLayout(FlowLayout.CENTER));
frame.setResizable(false);

show=newJTextField(31);
show.setText("0");
show.setHorizontalAlignment(SwingConstants.RIGHT);
show.setEnabled(false);
frame.add(show);

PaneldispTop=newPanel();
frame.add(dispTop);
dispTop.setLayout(newGridLayout(1,4,3,3));
bc=newJButton("BACK");
bc.addActionListener(this);
dispTop.add(bc);
ce=newJButton("CE");
ce.addActionListener(this);
dispTop.add(ce);
c=newJButton("C");
c.addActionListener(this);
dispTop.add(c);
ab=newJButton("ABOUT");
ab.addActionListener(this);
dispTop.add(ab);

//about弹出框
about=newJDialog(frame,"关于计算器",true);
about.addWindowListener(this);
JLabellabel=newJLabel("http://www.itzcn.com",JLabel.CENTER);
about.add(label);
about.setSize(200,100);
about.setLocation(500,300);
//数据显示区
PaneldispMain=newPanel();
frame.add(dispMain);
dispMain.setLayout(newGridLayout(1,2,10,10));
//按钮左面板
PaneldispLeft=newPanel();
frame.add(dispLeft);
dispLeft.setLayout(newGridLayout(4,3,3,3));//四行三列
//按钮右面板
PaneldispRight=newPanel();
frame.add(dispRight);
dispRight.setLayout(newGridLayout(4,2,3,3));//四行两列

for(intl=9;l>=0;l--){
b[l]=newJButton(String.valueOf(l));
dispLeft.add(b[l]);
b[l].addActionListener(this);
}

zf=newJButton("+/-");
zf.addActionListener(this);
dispLeft.add(zf);
point=newJButton(".");
point.addActionListen