import javax.swing.*
import java.awt.event.*
import java.util.*
public class SnakeGame extends JFrame implements KeyListener{
private int stat=1,direction=0,bodylen=6,headx=7,heady=8,
tailx=1,taily=8,tail,foodx,foody,food//初始化定义变量
public final int EAST=1,WEST=2,SOUTH=3,NORTH=4//方向常量
int [][] fillblock=new int [20][20]//定义蛇身所占位置
public SnakeGame() {//构造函数
super("贪吃蛇")
setSize(510,510)
setVisible(true)//设定窗口属性
addKeyListener(this)//添加监听
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
for(int i=1i<=7i++) fillblock[i][8]=EAST//初始化蛇身属性
direction=EAST//方向初始化的设置
FoodLocate()//定位食物
while (stat==1){
fillblock[headx][heady]=direction
switch(direction){
case 1:headx++break
case 2:headx--break
case 3:heady++break
case 4:heady--break
}//蛇头的前进
if(heady>19||headx>19||tailx>19||taily>19||heady<0||headx<0||tailx<0||taily<0||fillblock[headx][heady]!=0){
stat=0
break
} //判断游戏是否结束
try{
Thread.sleep(150)}
catch(InterruptedException e){}//延迟
fillblock[headx][heady]=direction
if(headx==foodx&&heady==foody){//吃到食物
FoodLocate()
food=2
try{
Thread.sleep(100)}
catch(InterruptedException e){}//延迟
}
if(food!=0)food--
else{tail=fillblock[tailx][taily]
fillblock[tailx][taily]=0//蛇尾的消除
switch(tail){
case 1:tailx++break
case 2:tailx--break
case 3:taily++break
case 4:taily--break
}//蛇尾的前进
}
repaint()
}
if(stat==0)
JOptionPane.showMessageDialog(null,"GAME OVER","Game Over",JOptionPane.INFORMATION_MESSAGE)
}
public void keyPressed(KeyEvent e) {//按键响应
int keyCode=e.getKeyCode()
if(stat==1) switch(keyCode){
case KeyEvent.VK_UP:if(direction!=SOUTH) direction=NORTHbreak
case KeyEvent.VK_DOWN:if(direction!=NORTH)direction=SOUTHbreak
case KeyEvent.VK_LEFT:if(direction!=EAST)direction=WESTbreak
case KeyEvent.VK_RIGHT:if (direction!=WEST)direction=EASTbreak
}
}
public void keyReleased(KeyEvent e){}//空函数
public void keyTyped(KeyEvent e){} //空函数
public void FoodLocate(){//定位食物坐标
do{
Random r=new Random()
foodx=r.nextInt(20)
foody=r.nextInt(20)
}while (fillblock[foodx][foody]!=0)
}
public void paint(Graphics g){//画图
super.paint(g)
g.setColor(Color.BLUE)
for(int i=0i<20i++)
for(int j=0j<20j++)
if (fillblock[i][j]!=0)
g.fillRect(25*i+5,25*j+5,24,24)
g.setColor(Color.RED)
g.fillRect(foodx*25+5,foody*25+5,24,24)
}
public static void main(String[] args) {//主程序
SnakeGame application=new SnakeGame()
}
}
=====================第一个类=============================/**
*
* 实现了系统计算器连续按"="和按"+","-","*","/"进行累记运算的模式
*
* */
import javax.swing.*
import java.awt.*
import java.awt.event.*
public class CalculatorFrame extends JFrame {
private JTextField txtDis = new JTextField("0", 16)//显示文本框
private JButton[] btnGrp = new JButton[17]//17个按钮
private JPanel jpnMain = new JPanel()//主面板
private JPanel jpnNorth = new JPanel()//上面板
private JPanel jpnSouth = new JPanel()//下面板
private double numSaved//保存的前一个数
private String operator = ""//保存的运算符号
private String lastPress = ""//上一次按的按钮（"数字","运算符" 或 "等号"）
/*构造函数*/
public CalculatorFrame() {
//窗口设置
setTitle("计算器")
setSize(210, 250)
buttonInit()//按钮初始化
//主面板设置
add(jpnMain)
jpnMain.setLayout(null)
jpnMain.add(jpnNorth)
jpnMain.add(jpnSouth)
jpnMain.add(btnGrp[15])
btnGrp[15].setBounds(8, 180, 188, 30)//添加“=”按钮
//上面板设置
jpnNorth.setBounds(8, 10, 190, 30)
jpnNorth.add(txtDis)
txtDis.setHorizontalAlignment(JTextField.RIGHT)//设置文本右对齐
txtDis.setEditable(false)
//下面板设置
jpnSouth.setBounds(8, 60, 190, 120)
jpnSouth.setLayout(new GridLayout(4, 4))
addSouthJpn()//添加17个按钮
//添加监听器
addListener()
}
/*17个按钮显示值初始化*/
public void buttonInit() {
for (int i = 0i <10i++) {
btnGrp[i] = new JButton("" + i)
}
btnGrp[10] = new JButton(".")
btnGrp[11] = new JButton("+")
btnGrp[12] = new JButton("-")
btnGrp[13] = new JButton("*")
btnGrp[14] = new JButton("/")
btnGrp[15] = new JButton("=")
btnGrp[16] = new JButton("C")
for (int i = 0i <17i++) {
btnGrp[i].setFont(new Font("Dialog", Font.PLAIN, 18))
}
}
/*按网格顺序添加除“=”外16个按钮*/
public void addSouthJpn() {
int[] index={7,8,9,14,4,5,6,13,1,2,3,12,0,16,10,11}
for(int i=0i<index.lengthi++){
jpnSouth.add(btnGrp[index[i]])
}
}
/*给按钮添加监听器*/
public void addListener() {
//给数字按钮添加监听器,btnGrp[10]是"."号
for (int i = 0i <= 10i++) {
btnGrp[i].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String button = ( (JButton) e.getSource()).getText()
//如果有运算 *** 作符或文本框数字为0并且按钮不为“。”
if (lastPress == "运算符" || lastPress == "等号"
|| txtDis.getText().equals("0") &&button != ".") {
txtDis.setText("")//清空文本框
}
if (lastPress == "等号") {
operator = ""//上次按的是=号，这次按数字，清空运算符
}
if (button == "." &&txtDis.getText().indexOf(".") != -1) {
} //这次按的是.文本框内已经包含.这种情况什么都不做,防止.重复
else {
txtDis.setText(txtDis.getText() + button)//文本框添加内容
}
lastPress = "数字"
}
})
}
//给运算 *** 作符按钮添加监听器
for (int i = 11i <= 14i++) {
btnGrp[i].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (operator != "" &&lastPress == "数字") { //运算符不为空并且之前按的是数字
(btnGrp[15].getActionListeners())[0].actionPerformed(e)//手动调用=号的监听响应实现=号功能
}
numSaved = Double.parseDouble(txtDis.getText())//保存当前文本框的数字
operator = ( (JButton) e.getSource()).getText()//保存运算 *** 作符
lastPress = "运算符"//添加运算符标记，下次文本框清空
}
})
}
//给等号按钮添加监听器
btnGrp[15].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
double numNow = Double.parseDouble(txtDis.getText())//当前文本框的数字
//运算符匹配 *** 作
if (operator.equals("+")) {
txtDis.setText( (numSaved + numNow) + "")
}
else if (operator.equals("-")) {
if (lastPress == "等号") { //累记运算时的算法（一直按等号）
txtDis.setText( (numNow - numSaved) + "")
}
else {
txtDis.setText( (numSaved - numNow) + "")
}
}
else if (operator.equals("*")) {
txtDis.setText( (numSaved * numNow) + "")
}
else if (operator.equals("/")) {
if (lastPress == "等号") { //累记运算时的算法（一直按等号）
txtDis.setText( (numNow / numSaved) + "")
}
else {
txtDis.setText( (numSaved / numNow) + "")
}
}
if (lastPress != "等号") { //是第一次,以后按累记运算
numSaved = numNow//保存数改为后一个数
}
lastPress = "等号"//添加运算符标记，下次文本框清空
}
})
//给复位符“C”按钮添加监听器
btnGrp[16].addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
txtDis.setText("0")
numSaved = 0
operator = ""
lastPress = ""
}
})
}
}
=====================第二个类=============================
import javax.swing.*
public class Test {
public Test() {
CalculatorFrame calframe = new CalculatorFrame()//新窗口
calframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)//设置关闭
calframe.setLocationRelativeTo(null)//窗口置中
calframe.setVisible(true)//显示窗口
calframe.setDefaultLookAndFeelDecorated(false)//使用windows视感
calframe.setResizable(false)//窗口不可调大小
}
public static void main(String[] args) {
Test test = new Test()
}
}
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