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swing练习系列1 -- Snake贪吃蛇（源代码） [复制链接]

ftInternet

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发表于 2007-07-18 15:20 |只看该作者 |倒序浏览

最近想学习学习JAVA，把一些练习内容贴出来，大家分享一下。

下面这个代码，比较粗糙。有兴趣的可以copy & paste 测试下。Thanks for any comment.

package com.ftinternet;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
class SnakePoint extends JButton {
private static final long serialVersionUID = 1L;
public final static int SOBJECT_NORMAL = 0;
public final static int SOBJECT_GIFT = 1;
private int XPoint = -1;
private int YPoint = -1;
private int ObjectType = SOBJECT_NORMAL;
public SnakePoint(int XPoint, int YPoint) {
this.XPoint = XPoint;
this.YPoint = YPoint;
setText(" ");
reset();
}
public void reset() {
setBackground(Color.lightGray);
ObjectType = SOBJECT_NORMAL;
}
public void SetPointType(int aPointType) {
ObjectType = aPointType;
switch(ObjectType) {
case SOBJECT_GIFT:
setBackground(Color.green);
}
}
public int GetPointType() {
return ObjectType;
}
public void SetIsSnakeBody(boolean IsBody) {
if (IsBody)
setBackground(Color.red);
else
setBackground(Color.lightGray);
}
public int GetXPoint() { return XPoint; }
public int GetYPoint() { return YPoint; }
}
public class Snake extends JFrame {
private static final long serialVersionUID = -7042297423926026518L;
private int SnakeMaxLength = 10;
private int SnakeMapWidth = 30;
private int SnakeMapHeight = 30;
JPanel pnlControl = new JPanel();
JPanel pnlView = new JPanel();
JLabel lbScore = new JLabel("0");
JComboBox cbxGameSpeedLvl = new JComboBox(new String[] {"Easy", "Normal", "Hard"});
private HashMap<String, SnakePoint> SnakeMap = new HashMap<String, SnakePoint>();
LinkedList<SnakePoint> SnakeBody = new LinkedList<SnakePoint>();
private boolean GameActive = false;
private final Timer timer = new Timer();
private final static int MOVE_STAY = -1;
private final static int MOVE_EAST = 0;
private final static int MOVE_SOUTH = 1;
private final static int MOVE_WEST = 2;
private final static int MOVE_NORTH = 3;
private int MoveDirection = MOVE_STAY;
private int NextDirection = MOVE_STAY;
private String GetSnakePointCode(int XPoint, int YPoint) {
return "" + XPoint + "-" + YPoint;
}
private String GetSnakePointCode(int Index) {
return GetSnakePointCode(Index % SnakeMapWidth, Index / SnakeMapWidth);
}
private SnakePoint GetSnakePoint(int XPoint, int YPoint) {
return (SnakePoint) SnakeMap.get(GetSnakePointCode(XPoint, YPoint));
}
private SnakePoint GetSnakePoint(int Index) {
return (SnakePoint) SnakeMap.get(GetSnakePointCode(Index));
}
public Snake(int aWidth, int aHeight, int aMaxLength) {
setDefaultCloseOperation(EXIT_ON_CLOSE);
setTitle("Snake 1.0");
SnakeMapWidth = aWidth > 10 ? aWidth : 10;
SnakeMapHeight = aHeight > 10 ? aHeight : 10;
SnakeMaxLength = aMaxLength;
getContentPane().add(pnlControl, BorderLayout.NORTH);
pnlControl.setLayout(new FlowLayout(FlowLayout.LEFT, 30, 2));
pnlControl.add(lbScore);
JButton bRestart = new JButton("Start");
pnlControl.add(bRestart);
bRestart.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent ae) {
InitGame();
}
});
JButton bPause = new JButton("Pause");
pnlControl.add(bPause);
bPause.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent ae) {
if (SnakeBody.size() < 1) return;
GameActive = !GameActive;
GetSnakePoint(0).grabFocus();
JButton mbSender = (JButton) ae.getSource();
if (GameActive)
mbSender.setText("Pause");
else
mbSender.setText("Continue");
}
});
pnlControl.add(new JLabel("Move Speed:"));
pnlControl.add(cbxGameSpeedLvl);
cbxGameSpeedLvl.setSelectedIndex(1);
getContentPane().add(pnlView, BorderLayout.CENTER);
pnlView.setLayout(new GridLayout(SnakeMapHeight, SnakeMapWidth));
for (int h = 0; h < SnakeMapHeight; h++)
for (int w = 0; w < SnakeMapWidth; w++)
{
SnakePoint aPoint = new SnakePoint(w, h);
pnlView.add(aPoint);
SnakeMap.put(GetSnakePointCode(w, h), aPoint);
aPoint.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
switch (e.getKeyCode())
{
case KeyEvent.VK_W:
case KeyEvent.VK_UP:
SetMoveDirection(MOVE_NORTH);
break;
case KeyEvent.VK_S:
case KeyEvent.VK_DOWN:
SetMoveDirection(MOVE_SOUTH);
break;
case KeyEvent.VK_A:
case KeyEvent.VK_LEFT:
SetMoveDirection(MOVE_WEST);
break;
case KeyEvent.VK_D:
case KeyEvent.VK_RIGHT:
SetMoveDirection(MOVE_EAST);
break;
}
}
});
}
timer.schedule(new TimerTask() {
public void run() {
if (!GameActive) return;
UpdateSnake();
}
}, 0, 50);
pack();
}
private void GameOver(boolean Active)
{
GameActive = false;
}
protected void InitGame() {
SnakeBody.clear();
for (int i = 0; i < SnakeMapWidth * SnakeMapHeight; i++)
GetSnakePoint(i).reset();
SnakeBody.add(GetSnakePoint(SnakeMapWidth / 2, SnakeMapHeight / 2));
SnakeBody.add(GetSnakePoint(SnakeMapWidth / 2 - 1, SnakeMapHeight / 2));
SnakeBody.add(GetSnakePoint(SnakeMapWidth / 2 - 2, SnakeMapHeight / 2));
RefreshSnake();
CreateGift();
lbScore.setText("0");
GetSnakePoint(0).grabFocus();
GameActive = true;
}
protected void UpdateScore(int aIncrement) {
lbScore.setText("" + (Integer.parseInt(lbScore.getText()) + aIncrement));
}
protected synchronized void RefreshSnake() {
for (int i = 0; i < SnakeBody.size(); i++)
((SnakePoint) SnakeBody.get(i)).SetIsSnakeBody(true);
}
protected synchronized void SetMoveDirection(int aDirection)
{
if (Math.abs(aDirection - MoveDirection) == 2) return;
NextDirection = aDirection;
}
protected void CreateGift() {
SnakePoint aGift = null;
Random rand = new Random();
while (aGift == null) {
aGift = GetSnakePoint(rand.nextInt(SnakeMapWidth * SnakeMapHeight));
if (SnakeBody.indexOf(aGift) >= 0) aGift = null;
}
aGift.SetPointType(SnakePoint.SOBJECT_GIFT);
}
private int RunTimeClock = 0;
protected boolean CheckSpeedLvl() {
if (++RunTimeClock > cbxGameSpeedLvl.getItemCount() - cbxGameSpeedLvl.getSelectedIndex() - 1) {
RunTimeClock = 0;
return true;
}
return false;
}
protected synchronized void UpdateSnake() {
if (!GameActive || !CheckSpeedLvl()) return;
SnakePoint SnakeHead = (SnakePoint) SnakeBody.get(0);
int nXPoint = SnakeHead.GetXPoint();
int nYPoint = SnakeHead.GetYPoint();
if (NextDirection != MoveDirection) MoveDirection = NextDirection;
switch(MoveDirection)
{
case MOVE_EAST:
nXPoint = nXPoint == SnakeMapWidth - 1 ? 0 : nXPoint + 1;
break;
case MOVE_SOUTH:
nYPoint = nYPoint == SnakeMapHeight - 1 ? 0 : nYPoint + 1;
break;
case MOVE_WEST:
nXPoint = nXPoint == 0 ? SnakeMapWidth - 1 : nXPoint - 1;
break;
case MOVE_NORTH:
nYPoint = nYPoint == 0 ? SnakeMapHeight - 1 : nYPoint - 1;
break;
default:
return;
}
SnakeHead = GetSnakePoint(nXPoint, nYPoint);
if (SnakeBody.indexOf(SnakeHead) > 1) {
GameOver(false);
return;
}
SnakeBody.addFirst(SnakeHead);
if (SnakeHead.GetPointType() == SnakePoint.SOBJECT_GIFT) {
UpdateScore(10);
SnakeHead.SetPointType(SnakePoint.SOBJECT_NORMAL);
CreateGift();
if (SnakeBody.size() >= SnakeMaxLength)
((SnakePoint) SnakeBody.removeLast()).SetIsSnakeBody(false);
}
else
((SnakePoint) SnakeBody.removeLast()).SetIsSnakeBody(false);
RefreshSnake();
}
public static void main(String[] args) {
Snake aGame = new Snake(20, 20, 50);
aGame.setVisible(true);
}
}