calculate24.java

24点游戏

import java.applet.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class Calculate24 extends Applet implements ActionListener{
AudioClip audio;
Panel pnlBottom;
MyImgPanel pnlCenter;
TextField txtField;
int []myStatus=new int[4];
public Calculate24()
{
setLayout(new BorderLayout());
pnlCenter=new MyImgPanel(this);
pnlCenter.initImg();
add(pnlCenter, BorderLayout.CENTER);
pnlBottom=new Panel();
add(pnlBottom,BorderLayout.SOUTH);
setBackground(Color.lightGray );
Button btnStart=new Button("开始游戏");
Button btnOK=new Button("确定");
txtField=new TextField(15);
Label label=new Label("请输入表达式:");
pnlBottom.add(btnStart);
pnlBottom.add(label);
pnlBottom.add(txtField);
pnlBottom.add(btnOK);
btnStart.setActionCommand("start");
btnStart.addActionListener(this);
btnOK.setActionCommand("ok");
btnOK.addActionListener(this);
}
public void init(){
for(int i=0; i<4;i++)
myStatus[i]=0;
audio = getAudioClip(getDocumentBase(),
"123.wav");

}
public void actionPerformed(ActionEvent evt)
{
if(evt.getActionCommand().equals("start"))
{
audio.play();
for(int i=0;i<4;i++)
myStatus[i]=(int)(Math.random() * 13)+1;
pnlCenter.repaint();
}
else if(evt.getActionCommand().equals("ok"))
{
try{
int result=calculateString(txtField.getText().trim());
if(result==-1){
txtField.setText("");
txtField.requestFocus();
new MsgDlg("你输入的表达式不合法,请重新输入!");
}
else if(result!=24){
txtField.setText("");
txtField.requestFocus();
new MsgDlg("你输入的表达式的值为"+result+"请重新输入!");
}
else if(result==24){
txtField.requestFocus();
new MsgDlg("祝贺你,你的输入正确!");
for(int i=0;i<4;i++)
myStatus[i]=(int)(Math.random() * 13)+1;
pnlCenter.repaint();
txtField.setText(" ");
txtField.requestFocus();
}
}
catch(Exception e)
{
e.printStackTrace();}
}
}
public int calculateString(String str){
int []numbers=new int[4];
String []operators=new String[4];
for(int i=0;i<4;i++){
operators[i]="";
}
String tempStr,myString="";
int numberNo=0,operatorNo=0;
for(int i=0;i<str.length();i++)
{
tempStr=str.substring(i,i+1);
if(isNumber(tempStr)){
myString+=tempStr;
}
else if(isOperator(tempStr)){
if(numberNo>=4||operatorNo>=3)
return -1;
try{
numbers[numberNo]=Integer.parseInt(myString);
}catch(Exception e){}
myString="";
numberNo++;
operators[operatorNo]=tempStr;
operatorNo++;
}
else{
return -1;
}
}
if(myString.length()!=0&&numberNo==3){
try{
numbers[numberNo]=Integer.parseInt(myString);
}catch(Exception e) { return -1;}
}
else return -1;
int tempStatus[]=new int[4];
for (int i=0;i<4;i++){
tempStatus[i]=myStatus[i];
}
for(int i=0;i<4;i++)
{
int j=0;
boolean existed=false;
while(j<4&&! existed){
if(tempStatus[j]==numbers[i])
{
tempStatus[j]=-1;
existed=true;
}
j++;
}
if(!existed)
return -1;
}
int result=numbers[0];
for(int i=0;i<3;i++){
if(operators[i].equals("+")){
result+=numbers[i+1];
}
else if(operators[i].equals("-")){
result-=numbers[i+1];
}else if(operators[i].equals("*")){
result*=numbers[i+1];
}else if(operators[i].equals("/")){
result/=numbers[i+1];
}
}
return result;
}
private boolean isNumber(String str){
if(str.equals("0")||str.equals("1")||str.equals("2")||str.equals("3")||str.equals("4")||str.equals("5")||str.equals("6")||str.equals("7")||str.equals("8")||str.equals("9"))
return true;
else return false;
}
private boolean isOperator(String str){
if(str.equals("+")||str.equals("-")||str.equals("*")||str.equals("/"))
return true;
else return false;
}
}
class MyImgPanel extends Panel{
final int IMGSIZE=100;
Image []myImage=new Image[14];
Calculate24 mycal24;
public MyImgPanel(Calculate24 cal24){
mycal24=cal24;
}
public void initImg(){
URL url=null;
try{
url=Class.forName("Calculate24").getResource("img0.jpg");
}catch(Exception e){e.printStackTrace();}
myImage[0]=getToolkit().getImage(url);
for(int i=1;i<=13;i++){
try{
url=Class.forName("Calculate24").getResource("img"+i+".jpg");
System.out.println(url.toString());
}catch(Exception e){}
myImage[i]=getToolkit().getImage(url);
}
MediaTracker mt=new MediaTracker(this);
for(int i=0;i<=13;i++)
mt.addImage(myImage[i],i);
try{
mt.wait();
mt.checkAll();
}catch(Exception e) {}
}
public void paint(Graphics g){
for(int i=0;i<4;i++)
g.drawImage(myImage[mycal24.myStatus[i]], i*IMGSIZE+5,5,this);
}
}
class MsgDlg extends Frame implements ActionListener{
Label label=new Label();
public MsgDlg(String strMsg){
super();
setTitle("表达式结果");
Panel p=new Panel();
add(p);
p.add(label);
label.setText(strMsg);

setSize(200,100);
setLocation(400,300);
Button btnOK=new Button("确定");
btnOK.addActionListener(this);
p.add(btnOK);
setVisible(true);
}
public void actionPerformed(ActionEvent evt){
this.dispose();
}
}