package test1;
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import java.awt.Frame;
import java.awt.TextField;
import java.awt.Button;
import java.awt.Panel;
import java.awt.GridLayout;
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import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
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import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class calculate {
?? ?TextField tfResult;
?? ?Button btNum[],btOper[],btPoint,btEqual,btBack,btSqrt,btPingfang,btLifang;
?? ?int num1,num2;//操作數(shù)
?? ?char oper;//操作符
?? ?boolean isNum;//代表數(shù)字標(biāo)志位
?? ?public void init(){
?? ??? ?Frame f;
?? ??? ?
?? ??? ?tfResult=new TextField();
?? ??? ?
?? ??? ?btNum=new Button[10];//數(shù)組對象
?? ??? ?for(int i=0;i<=9;i++){
?? ??? ??? ?btNum[i]=new Button(i+"");
?? ??? ?}
?? ??? ?btOper=new Button[4];
?? ??? ?btOper[0]=new Button("+");
?? ??? ?btOper[1]=new Button("-");
?? ??? ?btOper[2]=new Button("*");
?? ??? ?btOper[3]=new Button("/");
?? ??? ?
?? ??? ?btPoint=new Button(".");
?? ??? ?btEqual=new Button("=");
?? ??? ?btBack=new Button("Backspace");
?? ??? ?btSqrt=new Button("Sqrt");
?? ??? ?btPingfang=new Button("2");
?? ??? ?btLifang=new Button("3");
?? ??? ?f=new Frame("小羊羔的計算器！");
?? ??? ?
?? ??? ?f.setSize(300,300);
?? ??? ?
?? ??? ?//放置組件
?? ??? ?f.add(tfResult,"North");
?? ??? ?Panel panel=new Panel();
?? ??? ?f.add(panel,"Center");
?? ??? ?GridLayout gl=new GridLayout(5,4);
?? ??? ?panel.setLayout(gl);
?? ??? ?panel.add(btNum[1]);
?? ??? ?panel.add(btNum[2]);
?? ??? ?panel.add(btNum[3]);
?? ??? ?panel.add(btOper[0]);
?? ??? ?
?? ??? ?panel.add(btNum[4]);
?? ??? ?panel.add(btNum[5]);
?? ??? ?panel.add(btNum[6]);
?? ??? ?panel.add(btOper[1]);
?? ??? ?
?? ??? ?panel.add(btNum[7]);
?? ??? ?panel.add(btNum[8]);
?? ??? ?panel.add(btNum[9]);
?? ??? ?panel.add(btOper[2]);
?? ??? ?
?? ??? ?panel.add(btNum[0]);
?? ??? ?panel.add(btPoint);
?? ??? ?panel.add(btEqual);
?? ??? ?panel.add(btOper[3]);
?? ??? ?
?? ??? ?panel.add(btBack);
?? ??? ?panel.add(btSqrt);
?? ??? ?panel.add(btPingfang);
?? ??? ?panel.add(btLifang);
?? ??? ?f.setVisible(true);
?? ??? ?
?? ??? ?//注冊監(jiān)聽
?? ??? ?f.addWindowListener(new MyWinLis());
?? ??? ?//數(shù)字按鈕注冊監(jiān)聽
?? ??? ?MyNumLis mnl=new MyNumLis();
?? ??? ?for(int i=0;i<=9;i++)
?? ??? ??? ?btNum[i].addActionListener(mnl);
?? ??? ?
?? ??? ?//操作符按鈕注冊監(jiān)聽
?? ??? ?MyOperLis mol=new MyOperLis();
?? ??? ?for(int j=0;j<=3;j++)
?? ??? ??? ?btOper[j].addActionListener(mol);
?? ??? ?//等號按鈕注冊監(jiān)聽
?? ??? ?MyEqualLis mel=new MyEqualLis();
?? ??? ?btEqual.addActionListener(mel);
?? ??? ?//刪除按鈕注冊監(jiān)聽
?? ??? ?MyBackLis mbl=new MyBackLis();
?? ??? ?btBack.addActionListener(mbl);
?? ??? ?//開根號按鈕注冊監(jiān)聽
?? ??? ?MySqrtLis msl=new MySqrtLis();
?? ??? ?btSqrt.addActionListener(msl);
?? ??? ?//平方按鈕注冊監(jiān)聽
?? ??? ?MyPingfangLis mpl=new MyPingfangLis();
?? ??? ?btPingfang.addActionListener(mpl);
?? ??? ?//百分號注冊監(jiān)聽
?? ??? ?MyLifangLis mll=new MyLifangLis();
?? ??? ?btLifang.addActionListener(mll);
?? ?}
?? ?//定義監(jiān)聽器類
?? ?class MyNumLis implements ActionListener{
?? ??? ?public void actionPerformed(ActionEvent e){
?? ??? ??? ?String t=e.getActionCommand();
?? ??? ??? ?String s=tfResult.getText();
?? ??? ??? ?if(isNum==false)
?? ??? ??? ??? ?tfResult.setText(t);
?? ??? ??? ?else?
?? ??? ??? ??? ?tfResult.setText(s+t);
?? ??? ??? ?isNum=true;
?? ??? ?}
?? ?}
?? ?class MySqrtLis implements ActionListener{
?? ??? ?public void actionPerformed(ActionEvent e){
?? ??? ??? ?double t=Double.parseDouble(tfResult.getText());
?? ??? ??? ?tfResult.setText(Math.sqrt(t)+"");
?? ??? ??? ?isNum=false;
?? ??? ?}
?? ?}
?? ?class MyPingfangLis implements ActionListener{
?? ??? ?public void actionPerformed(ActionEvent e){
?? ??? ??? ?num1=Integer.parseInt(tfResult.getText());
?? ??? ??? ?tfResult.setText(num1*num1+"");
?? ??? ?}
?? ?}
?? ?class MyLifangLis implements ActionListener{
?? ??? ?public void actionPerformed(ActionEvent e){
?? ??? ??? ?num1=Integer.parseInt(tfResult.getText());
?? ??? ??? ?tfResult.setText(num1*num1*num1+"");
?? ??? ?}
?? ?}
?? ?class MyOperLis implements ActionListener{
?? ??? ?public void actionPerformed(ActionEvent e){
?? ??? ??? ?num1=Integer.parseInt(tfResult.getText());//轉(zhuǎn)化為INT
?? ??? ??? ?oper=e.getActionCommand().charAt(0);
?? ??? ??? ?isNum=false;
?? ??? ?}
?? ?}
?? ?class MyEqualLis implements ActionListener{
?? ??? ?public void actionPerformed(ActionEvent e){
?? ??? ??? ?int result=0;
?? ??? ??? ?isNum=false;
?? ??? ??? ?num2=Integer.parseInt(tfResult.getText());
?? ??? ??? ?switch(oper){
?? ??? ??? ??? ?case '+':result=num1+num2;break;
?? ??? ??? ??? ?case '-':result=num1-num2;break;
?? ??? ??? ??? ?case '*':result=num1*num2;break;
?? ??? ??? ??? ?case '/':result=num1/num2;break;
?? ??? ??? ?}
?? ??? ??? ?tfResult.setText(result+"");
?? ??? ?}
?? ?}
?? ?class MyBackLis implements ActionListener{
?? ??? ?public void actionPerformed(ActionEvent e){
?? ??? ??? ?tfResult.setText("");
?? ??? ??? ?isNum=false;
?? ??? ?}
?? ?}
?? ?class MyWinLis extends WindowAdapter{
?? ??? ?public void windowClosing(WindowEvent e){
?? ??? ??? ?e.getWindow().setVisible(false);
?? ??? ??? ?e.getWindow().dispose();
?? ??? ??? ?System.exit(0);
?? ??? ?}
?? ?}
?? ?
?? ?public static void main(String[] args) {
?? ??? ?// TODO Auto-generated method stub
?? ??? ?new calculate().init();
?? ?}
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}