使用双缓冲有点毁了我的小程序.并且它有 java 使用或覆盖已弃用的 API [英] using double buffering kinda ruin my applet. and it has java uses or overrides a deprecated API
本文介绍了使用双缓冲有点毁了我的小程序.并且它有 java 使用或覆盖已弃用的 API的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
这是我的代码，实际上它只是一个移动的太空入侵者游戏.我在互联网上搜索动画我试过双缓冲，它摆脱了闪烁，但它破坏了整个输出.它还具有 java 使用或覆盖已弃用的 API.注意:使用 -Xlint:deprecation 重新编译以获取详细信息.这太难了...
this is my code actually it's just a moving space invader game. i search the internet for the animation i have tried the double buffering, it gets rid the flickering but its ruining the entire output. it also has java uses or overrides a deprecated API. Note: Recompile with -Xlint:deprecation for details. this is so hard...
import javax.sound.sampled.*;
import java.applet.*;
import java.awt.*;
public class SpaceInvaders extends Applet implements Runnable{
AudioClip soundFile1;
int Xposition=500,Xposition1=-500,Yposition=15;
Thread runner;
public void start()
{
if (runner == null);
{
runner = new Thread(this);
runner.start();
}
}
public void stop()
{
if (runner != null);
{
runner.stop();
runner = null;
}
}
public void run()
{
while(true)
{
setBackground(Color.black);
repaint();
try {Thread.sleep(20);}
catch(InterruptedException e) { }
}
}
public void init()
{
soundFile1 = getAudioClip(getDocumentBase(),"si.au");
//soundFile1.play();
soundFile1.loop();
}
public void paint( Graphics g ) {
g.setColor( Color.orange );
g.fillRect(Xposition+50,10,10,10);
g.fillRect(Xposition+60,10,10,10);
g.fillRect(Xposition+40,20,10,10);
g.fillRect(Xposition+50,20,10,10);
g.fillRect(Xposition+60,20,10,10);
g.fillRect(Xposition+70,20,10,10);
g.fillRect(Xposition+30,30,10,10);
g.fillRect(Xposition+40,30,10,10);
g.fillRect(Xposition+50,30,10,10);
g.fillRect(Xposition+60,30,10,10);
g.fillRect(Xposition+70,30,10,10);
g.fillRect(Xposition+80,30,10,10);
g.fillRect(Xposition+20,40,10,10);
g.fillRect(Xposition+30,40,10,10);
g.fillRect(Xposition+50,40,10,10);
g.fillRect(Xposition+60,40,10,10);
g.fillRect(Xposition+80,40,10,10);
g.fillRect(Xposition+90,40,10,10);
g.fillRect(Xposition+20,50,10,10);
g.fillRect(Xposition+30,50,10,10);
g.fillRect(Xposition+40,50,10,10);
g.fillRect(Xposition+50,50,10,10);
g.fillRect(Xposition+60,50,10,10);
g.fillRect(Xposition+70,50,10,10);
g.fillRect(Xposition+80,50,10,10);
g.fillRect(Xposition+90,50,10,10);
g.fillRect(Xposition+40,60,10,10);
g.fillRect(Xposition+70,60,10,10);
g.fillRect(Xposition+30,70,10,10);
g.fillRect(Xposition+50,70,10,10);
g.fillRect(Xposition+60,70,10,10);
g.fillRect(Xposition+80,70,10,10);
g.fillRect(Xposition+20,80,10,10);
g.fillRect(Xposition+40,80,10,10);
g.fillRect(Xposition+70,80,10,10);
g.fillRect(Xposition+90,80,10,10);
g.setColor(Color.red);
g.fillRect(Xposition+140,10,10,10);
g.fillRect(Xposition+200,10,10,10);
g.fillRect(Xposition+120,20,10,10);
g.fillRect(Xposition+150,20,10,10);
g.fillRect(Xposition+190,20,10,10);
g.fillRect(Xposition+220,20,10,10);
g.fillRect(Xposition+120,30,10,10);
g.fillRect(Xposition+140,30,10,10);
g.fillRect(Xposition+150,30,10,10);
g.fillRect(Xposition+160,30,10,10);
g.fillRect(Xposition+170,30,10,10);
g.fillRect(Xposition+180,30,10,10);
g.fillRect(Xposition+190,30,10,10);
g.fillRect(Xposition+200,30,10,10);
g.fillRect(Xposition+220,30,10,10);
g.fillRect(Xposition+120,40,10,10);
g.fillRect(Xposition+130,40,10,10);
g.fillRect(Xposition+140,40,10,10);
g.fillRect(Xposition+160,40,10,10);
g.fillRect(Xposition+170,40,10,10);
g.fillRect(Xposition+180,40,10,10);
g.fillRect(Xposition+200,40,10,10);
g.fillRect(Xposition+210,40,10,10);
g.fillRect(Xposition+220,40,10,10);
g.fillRect(Xposition+120,50,10,10);
g.fillRect(Xposition+130,50,10,10);
g.fillRect(Xposition+140,50,10,10);
g.fillRect(Xposition+150,50,10,10);
g.fillRect(Xposition+160,50,10,10);
g.fillRect(Xposition+170,50,10,10);
g.fillRect(Xposition+180,50,10,10);
g.fillRect(Xposition+190,50,10,10);
g.fillRect(Xposition+200,50,10,10);
g.fillRect(Xposition+210,50,10,10);
g.fillRect(Xposition+220,50,10,10);
g.fillRect(Xposition+130,60,10,10);
g.fillRect(Xposition+140,60,10,10);
g.fillRect(Xposition+150,60,10,10);
g.fillRect(Xposition+160,60,10,10);
g.fillRect(Xposition+170,60,10,10);
g.fillRect(Xposition+180,60,10,10);
g.fillRect(Xposition+190,60,10,10);
g.fillRect(Xposition+200,60,10,10);
g.fillRect(Xposition+210,60,10,10);
g.fillRect(Xposition+140,70,10,10);
g.fillRect(Xposition+200,70,10,10);
g.fillRect(Xposition+130,80,10,10);
g.fillRect(Xposition+210,80,10,10);
g.setColor(Color.blue);
g.fillRect(Xposition+280,10,10,10);
g.fillRect(Xposition+290,10,10,10);
g.fillRect(Xposition+270,20,10,10);
g.fillRect(Xposition+280,20,10,10);
g.fillRect(Xposition+290,20,10,10);
g.fillRect(Xposition+300,20,10,10);
g.fillRect(Xposition+260,30,10,10);
g.fillRect(Xposition+270,30,10,10);
g.fillRect(Xposition+280,30,10,10);
g.fillRect(Xposition+290,30,10,10);
g.fillRect(Xposition+300,30,10,10);
g.fillRect(Xposition+310,30,10,10);
g.fillRect(Xposition+250,40,10,10);
g.fillRect(Xposition+260,40,10,10);
g.fillRect(Xposition+280,40,10,10);
g.fillRect(Xposition+290,40,10,10);
g.fillRect(Xposition+310,40,10,10);
g.fillRect(Xposition+320,40,10,10);
g.fillRect(Xposition+250,50,10,10);
g.fillRect(Xposition+260,50,10,10);
g.fillRect(Xposition+270,50,10,10);
g.fillRect(Xposition+280,50,10,10);
g.fillRect(Xposition+290,50,10,10);
g.fillRect(Xposition+300,50,10,10);
g.fillRect(Xposition+310,50,10,10);
g.fillRect(Xposition+320,50,10,10); //20=250 30=260 40=270 50=280 60=290 70=300 80=310 90=320
g.fillRect(Xposition+260,60,10,10);
g.fillRect(Xposition+280,60,10,10);
g.fillRect(Xposition+290,60,10,10);
g.fillRect(Xposition+310,60,10,10);
g.fillRect(Xposition+250,70,10,10);
g.fillRect(Xposition+320,70,10,10);
g.fillRect(Xposition+260,80,10,10);
g.fillRect(Xposition+310,80,10,10);
g.setColor(Color.yellow);
g.fillRect(Xposition+370,10,10,10);
g.fillRect(Xposition+430,10,10,10);
g.fillRect(Xposition+380,20,10,10);
g.fillRect(Xposition+420,20,10,10);
g.fillRect(Xposition+370,30,10,10);
g.fillRect(Xposition+380,30,10,10);
g.fillRect(Xposition+390,30,10,10);
g.fillRect(Xposition+400,30,10,10);
g.fillRect(Xposition+410,30,10,10);
g.fillRect(Xposition+420,30,10,10);
g.fillRect(Xposition+430,30,10,10);
g.fillRect(Xposition+360,40,10,10);
g.fillRect(Xposition+370,40,10,10);
g.fillRect(Xposition+390,40,10,10);
g.fillRect(Xposition+400,40,10,10);
g.fillRect(Xposition+410,40,10,10);
g.fillRect(Xposition+430,40,10,10);
g.fillRect(Xposition+440,40,10,10);
g.fillRect(Xposition+350,50,10,10);
g.fillRect(Xposition+360,50,10,10);
g.fillRect(Xposition+370,50,10,10);
g.fillRect(Xposition+380,50,10,10);
g.fillRect(Xposition+390,50,10,10);
g.fillRect(Xposition+400,50,10,10);
g.fillRect(Xposition+410,50,10,10);
g.fillRect(Xposition+420,50,10,10);
g.fillRect(Xposition+430,50,10,10);
g.fillRect(Xposition+440,50,10,10);
g.fillRect(Xposition+450,50,10,10); //120=350 130=360 140=370 150=380 160=390 170=400 180=410 190=420 200=430 210=440 220=450
g.fillRect(Xposition+350,60,10,10);
g.fillRect(Xposition+370,60,10,10);
g.fillRect(Xposition+380,60,10,10);
g.fillRect(Xposition+390,60,10,10);
g.fillRect(Xposition+400,60,10,10);
g.fillRect(Xposition+410,60,10,10);
g.fillRect(Xposition+420,60,10,10);
g.fillRect(Xposition+430,60,10,10);
g.fillRect(Xposition+450,60,10,10);
g.fillRect(Xposition+350,70,10,10);
g.fillRect(Xposition+370,70,10,10);
g.fillRect(Xposition+430,70,10,10);
g.fillRect(Xposition+450,70,10,10);
g.fillRect(Xposition+380,80,10,10);
g.fillRect(Xposition+390,80,10,10);
g.fillRect(Xposition+410,80,10,10);
g.fillRect(Xposition+420,80,10,10);
Xposition--;
if (Xposition < -500)
{
Xposition = 500;
}
g.setColor(Color.green);
g.fillRect(Xposition1+230,130,10,10);
g.fillRect(Xposition1+240,130,10,10);
g.fillRect(Xposition1+250,130,10,10);
g.fillRect(Xposition1+260,130,10,10);
g.fillRect(Xposition1+270,130,10,10);
g.fillRect(Xposition1+280,130,10,10);
g.fillRect(Xposition1+210,140,10,10);
g.fillRect(Xposition1+220,140,10,10);
g.fillRect(Xposition1+230,140,10,10);
g.fillRect(Xposition1+240,140,10,10);
g.fillRect(Xposition1+250,140,10,10);
g.fillRect(Xposition1+260,140,10,10);
g.fillRect(Xposition1+270,140,10,10);
g.fillRect(Xposition1+280,140,10,10);
g.fillRect(Xposition1+290,140,10,10);
g.fillRect(Xposition1+300,140,10,10);
g.fillRect(Xposition1+200,150,10,10);
g.fillRect(Xposition1+210,150,10,10);
g.fillRect(Xposition1+220,150,10,10);
g.fillRect(Xposition1+230,150,10,10);
g.fillRect(Xposition1+240,150,10,10);
g.fillRect(Xposition1+250,150,10,10);
g.fillRect(Xposition1+260,150,10,10);
g.fillRect(Xposition1+270,150,10,10);
g.fillRect(Xposition1+280,150,10,10);
g.fillRect(Xposition1+290,150,10,10);
g.fillRect(Xposition1+300,150,10,10);
g.fillRect(Xposition1+310,150,10,10);
g.fillRect(Xposition1+190,160,10,10);
g.fillRect(Xposition1+200,160,10,10);
g.fillRect(Xposition1+220,160,10,10);
g.fillRect(Xposition1+230,160,10,10);
g.fillRect(Xposition1+250,160,10,10);
g.fillRect(Xposition1+260,160,10,10);
g.fillRect(Xposition1+280,160,10,10);
g.fillRect(Xposition1+290,160,10,10);
g.fillRect(Xposition1+310,160,10,10);
g.fillRect(Xposition1+320,160,10,10);
g.fillRect(Xposition1+180,170,10,10);
g.fillRect(Xposition1+190,170,10,10);
g.fillRect(Xposition1+200,170,10,10);
g.fillRect(Xposition1+210,170,10,10);
g.fillRect(Xposition1+220,170,10,10);
g.fillRect(Xposition1+230,170,10,10);
g.fillRect(Xposition1+240,170,10,10);
g.fillRect(Xposition1+250,170,10,10);
g.fillRect(Xposition1+260,170,10,10);
g.fillRect(Xposition1+270,170,10,10);
g.fillRect(Xposition1+280,170,10,10);
g.fillRect(Xposition1+290,170,10,10);
g.fillRect(Xposition1+300,170,10,10);
g.fillRect(Xposition1+310,170,10,10);
g.fillRect(Xposition1+320,170,10,10);
g.fillRect(Xposition1+330,170,10,10);
g.fillRect(Xposition1+200,180,10,10);
g.fillRect(Xposition1+210,180,10,10);
g.fillRect(Xposition1+220,180,10,10);
g.fillRect(Xposition1+250,180,10,10);
g.fillRect(Xposition1+260,180,10,10);
g.fillRect(Xposition1+290,180,10,10);
g.fillRect(Xposition1+300,180,10,10);
g.fillRect(Xposition1+310,180,10,10);
g.fillRect(Xposition1+210,190,10,10);
g.fillRect(Xposition1+300,190,10,10);
Xposition1++;
if (Xposition1 > 500)
{
Xposition1 = -500;
}
Yposition--;
if (Yposition > 500)
{
Yposition = -500;
}
g.setColor(Color.magenta);
g.fillRect(260,Yposition+240,10,10);
g.fillRect(260,Yposition+250,10,10);
g.setColor(Color.white);
g.fillRect(260,310,10,10);
g.fillRect(250,320,10,10);
g.fillRect(260,320,10,10);
g.fillRect(270,320,10,10);
g.fillRect(250,330,10,10);
g.fillRect(260,330,10,10);
g.fillRect(270,330,10,10);
g.fillRect(200,340,10,10);
g.fillRect(210,340,10,10);
g.fillRect(220,340,10,10);
g.fillRect(230,340,10,10);
g.fillRect(240,340,10,10);
g.fillRect(250,340,10,10);
g.fillRect(260,340,10,10);
g.fillRect(270,340,10,10);
g.fillRect(280,340,10,10);
g.fillRect(290,340,10,10);
g.fillRect(300,340,10,10);
g.fillRect(310,340,10,10);
g.fillRect(320,340,10,10);
g.fillRect(190,350,10,10);
g.fillRect(200,350,10,10);
g.fillRect(210,350,10,10);
g.fillRect(220,350,10,10);
g.fillRect(230,350,10,10);
g.fillRect(240,350,10,10);
g.fillRect(250,350,10,10);
g.fillRect(260,350,10,10);
g.fillRect(270,350,10,10);
g.fillRect(280,350,10,10);
g.fillRect(290,350,10,10);
g.fillRect(300,350,10,10);
g.fillRect(310,350,10,10);
g.fillRect(320,350,10,10);
g.fillRect(330,350,10,10);
g.fillRect(190,360,10,10);
g.fillRect(200,360,10,10);
g.fillRect(210,360,10,10);
g.fillRect(220,360,10,10);
g.fillRect(230,360,10,10);
g.fillRect(240,360,10,10);
g.fillRect(250,360,10,10);
g.fillRect(260,360,10,10);
g.fillRect(270,360,10,10);
g.fillRect(280,360,10,10);
g.fillRect(290,360,10,10);
g.fillRect(300,360,10,10);
g.fillRect(310,360,10,10);
g.fillRect(320,360,10,10);
g.fillRect(330,360,10,10);
g.fillRect(190,370,10,10);
g.fillRect(200,370,10,10);
g.fillRect(210,370,10,10);
g.fillRect(220,370,10,10);
g.fillRect(230,370,10,10);
g.fillRect(240,370,10,10);
g.fillRect(250,370,10,10);
g.fillRect(260,370,10,10);
g.fillRect(270,370,10,10);
g.fillRect(280,370,10,10);
g.fillRect(290,370,10,10);
g.fillRect(300,370,10,10);
g.fillRect(310,370,10,10);
g.fillRect(320,370,10,10);
g.fillRect(330,370,10,10);
g.fillRect(190,380,10,10);
g.fillRect(200,380,10,10);
g.fillRect(210,380,10,10);
g.fillRect(220,380,10,10);
g.fillRect(230,380,10,10);
g.fillRect(240,380,10,10);
g.fillRect(250,380,10,10);
g.fillRect(260,380,10,10);
g.fillRect(270,380,10,10);
g.fillRect(280,380,10,10);
g.fillRect(290,380,10,10);
g.fillRect(300,380,10,10);
g.fillRect(310,380,10,10);
g.fillRect(320,380,10,10);
g.fillRect(330,380,10,10);
}
public static void main(String[] args)
{
}
}
推荐答案
首先，不要这样做.
public void run() {
while (true) {
setBackground(Color.black);
repaint();
try {
Thread.sleep(20);
} catch (InterruptedException e) {
}
}
}
虽然我认为这是从 Runnable 上下文内部运行的，但您正在从 事件调度线程，这绝不是一个好主意.
While I appricate that this is being run from inside a Runnable context, you are effecting the UI from outside the Event Dispatching Thread, which is NEVER a good idea.
最好使用 javax.swing.Timer，见如何使用摇摆计时器了解更多信息.
You're better of using a javax.swing.Timer, see How to use Swing Timers for more info.
其次.您的示例代码没有双重缓冲.
Second of all. There is nothing double buffered about your sample code.
双缓冲会让您使用离屏缓冲(例如 BufferedImage) 将屏幕的内容渲染到屏幕之前.
Double buffering would have you using an off-screen buffered (such as a BufferedImage) to draw the contents of the screen to before it's rendered to the screen.
第三，如果您不想实现自己的双缓冲解决方案，我会使用 JPanel 或 JComponent 并将它们添加到 JAppelt.JComponent(及其子组件)默认支持双缓冲(你不应该直接绘制到顶级容器，在你不想成为的引擎盖下有很多令人讨厌的东西)负责).
Thridly, if you don't want to implement your own double buffering solution, I would use a JPanel or JComponent and add them to a JAppelt. JComponent (and it's children) support double buffering by default (you shouldn't paint directly to a top level container, there's to much icky stuff going on under the hood you don't want to have to become responsible for).
第四，我会认真阅读Graphics 2D 教程.
Fourthly, I would take some serious time to read through the Graphics 2D tutorial.
更新
这是我对基本想法的看法.请注意，我没有添加播放器，您可以自己弄清楚.
Here's my take on the basic idea. Note, I've not added the player, you can figure that out.
public class SpaceFrame {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException ex) {
} catch (InstantiationException ex) {
} catch (IllegalAccessException ex) {
} catch (UnsupportedLookAndFeelException ex) {
}
new SpaceFrame();
}
});
}
public SpaceFrame() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new SpacePane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
protected class SpacePane extends JPanel implements Screen {
private BufferedImage buffer;
public SpacePane() {
}
@Override
public void addNotify() {
super.addNotify();
// We need to make that the screen pane is actually on the screen...
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
Thread thread = new Thread(new UpdaterThread(SpacePane.this));
thread.setDaemon(true);
thread.start();
}
});
}
@Override
public Dimension getPreferredSize() {
return new Dimension(600, 400);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (buffer != null) {
Graphics2D g2d = (Graphics2D) g;
g2d.drawImage(buffer, 0, 0, this);
}
}
@Override
public void renderBuffer(final BufferedImage image) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
buffer = image;
repaint();
}
});
}
}
protected interface Screen {
public Dimension getSize();
public void renderBuffer(final BufferedImage image);
}
protected class UpdaterThread implements Runnable {
private int cycle = 0;
private BufferedImage[] buffers = new BufferedImage[2];
private Screen screen;
// A row of aliens...
private RowOfAliens rowOfAliens;
// Adjusts the speed at which the aliens move
private int speed = 10;
public UpdaterThread(Screen screen) {
this.screen = screen;
}
public Screen getScreen() {
return screen;
}
@Override
public void run() {
// We're only using 1 row...
rowOfAliens = new RowOfAliens();
rowOfAliens.setLocation(new Point(0, 0));
rowOfAliens.setDirection(10);
while (true) {
try {
Thread.sleep(16); // 60 fps
} catch (InterruptedException ex) {
}
cycle++;
// Update the offscreen buffer...
BufferedImage buffer = getBuffer();
if (buffer != null) {
// Move the alients...
updateAliens();
// Paint the various layers
int width = buffer.getWidth();
int height = buffer.getHeight();
Graphics2D g2d = buffer.createGraphics();
// You could paint a space scape here
paintBackground(g2d, width, height);
// The aliens and other game arifcates
paintMidground(g2d, width, height);
// Special effects
paintForeground(g2d, width, height);
g2d.dispose();
// Send the buffer to the screen
paintBuffer(buffer);
}
}
}
protected void updateAliens() {
Screen screen = getScreen();
if (screen != null) {
// Controls the speed at which the aliens move
if (cycle % speed == 0) {
// Get the aliens current location and direction...
Point p = rowOfAliens.getLocation();
p.x += rowOfAliens.getDirection();
int screenWidth = screen.getSize().width;
int screenHeight = screen.getSize().height;
// Boundray check...
if (p.x + rowOfAliens.getBounds().width > screenWidth) {
p.x = screenWidth - rowOfAliens.getBounds().width;
// Reverse direction
rowOfAliens.setDirection(-10);
p.y += 10;
} else if (p.x < 0) {
p.x = 0;
p.y += 10;
// Reverse direction
rowOfAliens.setDirection(10);
}
// Set the location of the row...
rowOfAliens.setLocation(p);
}
}
}
protected void paintBackground(Graphics2D g2d, int width, int height) {
g2d.setColor(Color.BLACK);
g2d.fillRect(0, 0, width, height);
}
protected void paintMidground(Graphics2D g2d, int width, int height) {
Point p = rowOfAliens.getLocation();
g2d.translate(p.x, p.y);
rowOfAliens.paint(g2d);
g2d.translate(-p.x, -p.y);
}
protected void paintForeground(Graphics2D g2d, int width, int height) {
}
protected BufferedImage getBuffer() {
BufferedImage buffer = null;
Screen screen = getScreen();
if (screen != null) {
// Determine which buffer to use
int index = 0;
if (cycle % 2 != 0) {
index = 1;
}
buffer = buffers[index];
if (buffer == null || buffer.getWidth() != screen.getSize().width || buffer.getHeight() != screen.getSize().height) {
// Create a compataible graphics object, so it will render faster on the screen...
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gs = ge.getDefaultScreenDevice();
GraphicsConfiguration gc = gs.getDefaultConfiguration();
buffer = gc.createCompatibleImage(screen.getSize().width, screen.getSize().height, Transparency.OPAQUE);
buffers[index] = buffer;
}
}
return buffer;
}
protected void paintBuffer(BufferedImage buffer) {
// Send the buffer to the screen...
Screen screen = getScreen();
if (screen != null) {
screen.renderBuffer(buffer);
}
}
}
protected class RowOfAliens {
private List<Alien> lstAliens;
private Point location;
private int direction;
private Rectangle bounds;
public RowOfAliens() {
lstAliens = new ArrayList<Alien>(25);
lstAliens.add(new AlienType1());
lstAliens.add(new AlienType2());
lstAliens.add(new AlienType3());
lstAliens.add(new AlienType4());
setLocation(new Point(0, 0));
// Calculate the size of the row...
bounds = new Rectangle(Integer.MAX_VALUE, Integer.MAX_VALUE, 0, 0);
int index = 0;
for (Alien alien : lstAliens) {
Rectangle aBounds = alien.getBounds();
aBounds.setLocation(alien.getLocation());
System.out.println(index + ": " + aBounds);
bounds.x = Math.min(bounds.x, aBounds.x);
bounds.y = Math.min(bounds.y, aBounds.y);
bounds.width = Math.max(bounds.width, aBounds.x + aBounds.width);
bounds.height = Math.max(bounds.height, aBounds.y + aBounds.height);
}
System.out.println(bounds);
}
protected void paint(Graphics2D g2d) {
// Paint the aliens
Point pos = getLocation();
for (Alien alien : lstAliens) {
g2d.setColor(alien.getColor());
Point p = alien.getLocation();
// We need to take into account the current location of the row
// in relation to the alien...
int xPos = p.x - pos.x;
g2d.translate(xPos, 0);
g2d.fill(alien);
g2d.translate(-xPos, 0);
}
}
protected void layoutRow() {
// Layout the aliens within there row based on the currrent location...
// Techniqually, we could offset the aliens at 0x0 and simply adjust the
// the x position by the width of each alien and it's gap
// This would eliminate the need to adjust the position in the
// paint method, but hay...
Point p = new Point(getLocation());
for (Alien alien : lstAliens) {
alien.setLocation(p);
p = new Point(p.x, p.y);
p.x += alien.getBounds().width + 10;
}
}
public Rectangle getBounds() {
return bounds;
}
public void setLocation(Point point) {
if (location == null || point == null || (!location.equals(point))) {
location = point;
layoutRow();
}
}
public Point getLocation() {
return new Point(location);
}
public void setDirection(int value) {
direction = value;
}
public int getDirection() {
return direction;
}
}
protected abstract class Alien extends Path2D.Float {
private Point location;
private Color color;
public Color getColor() {
return color;
}
public void setColor(Color color) {
this.color = color;
}
public void setLocation(Point location) {
this.location = location;
}
public Point getLocation() {
return location;
}
public void addRectangle(int x, int y, int width, int height) {
moveTo(x, y);
lineTo(x + width, y);
lineTo(x + width, y + height);
lineTo(x, y + height);
lineTo(x, y);
}
}
protected class AlienType1 extends Alien {
public AlienType1() {
setColor(Color.ORANGE);
addRectangle(30, 0, 10, 10);
addRectangle(40, 0, 10, 10);
addRectangle(20, 10, 10, 10);
addRectangle(30, 10, 10, 10);
addRectangle(40, 10, 10, 10);
addRectangle(50, 10, 10, 10);
addRectangle(10, 20, 10, 10);
addRectangle(20, 20, 10, 10);
addRectangle(30, 20, 10, 10);
addRectangle(40, 20, 10, 10);
addRectangle(50, 20, 10, 10);
addRectangle(60, 20, 10, 10);
addRectangle(0, 30, 10, 10);
addRectangle(10, 30, 10, 10);
addRectangle(30, 30, 10, 10);
addRectangle(40, 30, 10, 10);
addRectangle(60, 30, 10, 10);
addRectangle(70, 30, 10, 10);
addRectangle(0, 40, 10, 10);
addRectangle(10, 40, 10, 10);
addRectangle(20, 40, 10, 10);
addRectangle(30, 40, 10, 10);
addRectangle(40, 40, 10, 10);
addRectangle(50, 40, 10, 10);
addRectangle(60, 40, 10, 10);
addRectangle(70, 40, 10, 10);
addRectangle(20, 50, 10, 10);
addRectangle(50, 50, 10, 10);
addRectangle(10, 60, 10, 10);
addRectangle(30, 60, 10, 10);
addRectangle(40, 60, 10, 10);
addRectangle(60, 60, 10, 10);
addRectangle(0, 70, 10, 10);
addRectangle(20, 70, 10, 10);
addRectangle(50, 70, 10, 10);
addRectangle(70, 70, 10, 10);
closePath();
}
}
protected class AlienType2 extends Alien {
public AlienType2() {
setColor(Color.RED);
addRectangle(20, 0, 10, 10);
addRectangle(80, 0, 10, 10);
addRectangle(0, 10, 10, 10);
addRectangle(30, 10, 10, 10);
addRectangle(70, 10, 10, 10);
addRectangle(100, 10, 10, 10);
addRectangle(0, 20, 10, 10);
addRectangle(20, 20, 10, 10);
addRectangle(30, 20, 10, 10);
addRectangle(40, 20, 10, 10);
addRectangle(50, 20, 10, 10);
addRectangle(60, 20, 10, 10);
addRectangle(70, 20, 10, 10);
addRectangle(80, 20, 10, 10);
addRectangle(100, 20, 10, 10);
addRectangle(0, 30, 10, 10);
addRectangle(10, 30, 10, 10);
addRectangle(20, 30, 10, 10);
addRectangle(40, 30, 10, 10);
addRectangle(50, 30, 10, 10);
addRectangle(60, 30, 10, 10);
addRectangle(80, 30, 10, 10);
addRectangle(90, 30, 10, 10);
addRectangle(100, 30, 10, 10);
addRectangle(0, 40, 10, 10);
addRectangle(10, 40, 10, 10);
addRectangle(20, 40, 10, 10);
addRectangle(30, 40, 10, 10);
addRectangle(40, 40, 10, 10);
addRectangle(50, 40, 10, 10);
addRectangle(60, 40, 10, 10);
addRectangle(70, 40, 10, 10);
addRectangle(80, 40, 10, 10);
addRectangle(90, 40, 10, 10);
addRectangle(100, 40, 10, 10);
addRectangle(10, 50, 10, 10);
addRectangle(20, 50, 10, 10);
addRectangle(30, 50, 10, 10);
addRectangle(40, 50, 10, 10);
addRectangle(50, 50, 10, 10);
addRectangle(60, 50, 10, 10);
addRectangle(70, 50, 10, 10);
addRectangle(80, 50, 10, 10);
addRectangle(90, 50, 10, 10);
addRectangle(20, 60, 10, 10);
addRectangle(80, 60, 10, 10);
addRectangle(10, 70, 10, 10);
addRectangle(90, 70, 10, 10);
closePath();
}
}
protected class AlienType3 extends Alien {
public AlienType3() {
setColor(Color.YELLOW);
addRectangle(20, 0, 10, 10);
addRectangle(20, 0, 10, 10);
addRectangle(80, 0, 10, 10);
addRectangle(30, 10, 10, 10);
addRectangle(70, 10, 10, 10);
addRectangle(20, 20, 10, 10);
addRectangle(30, 20, 10, 10);
addRectangle(40, 20, 10, 10);
addRectangle(50, 20, 10, 10);
addRectangle(60, 20, 10, 10);
addRectangle(70, 20, 10, 10);
addRectangle(80, 20, 10, 10);
addRectangle(10, 30, 10, 10);
addRectangle(20, 30, 10, 10);
addRectangle(40, 30, 10, 10);
addRectangle(50, 30, 10, 10);
addRectangle(60, 30, 10, 10);
addRectangle(80, 30, 10, 10);
addRectangle(90, 30, 10, 10);
addRectangle(0, 40, 10, 10);
addRectangle(10, 40, 10, 10);
addRectangle(20, 40, 10, 10);
addRectangle(30, 40, 10, 10);
addRectangle(40, 40, 10, 10);
addRectangle(50, 40, 10, 10);
addRectangle(60, 40, 10, 10);
addRectangle(70, 40, 10, 10);
addRectangle(80, 40, 10, 10);
addRectangle(90, 40, 10, 10);
addRectangle(100, 40, 10, 10);
addRectangle(0, 50, 10, 10);
addRectangle(20, 50, 10, 10);
addRectangle(30, 50, 10, 10);
addRectangle(40, 50, 10, 10);
addRectangle(50, 50, 10, 10);
addRectangle(60, 50, 10, 10);
addRectangle(70, 50, 10, 10);
addRectangle(80, 50, 10, 10);
addRectangle(100, 50, 10, 10);
addRectangle(0, 60, 10, 10);
addRectangle(20, 60, 10, 10);
addRectangle(80, 60, 10, 10);
addRectangle(100, 60, 10, 10);
addRectangle(30, 70, 10, 10);
addRectangle(40, 70, 10, 10);
addRectangle(60, 70, 10, 10);
addRectangle(70, 70, 10, 10);
closePath();
}
}
protected class AlienType4 extends Alien {
public AlienType4() {
setColor(Color.GREEN);
addRectangle(50, 0, 10, 10);
addRectangle(60, 0, 10, 10);
addRectangle(70, 0, 10, 10);
addRectangle(80, 0, 10, 10);
addRectangle(90, 0, 10, 10);
addRectangle(100, 0, 10, 10);
addRectangle(30, 10, 10, 10);
addRectangle(40, 10, 10, 10);
addRectangle(50, 10, 10, 10);
addRectangle(60, 10, 10, 10);
addRectangle(70, 10, 10, 10);
addRectangle(80, 10, 10, 10);
addRectangle(90, 10, 10, 10);
addRectangle(100, 10, 10, 10);
addRectangle(110, 10, 10, 10);
addRectangle(120, 10, 10, 10);
addRectangle(20, 20, 10, 10);
addRectangle(30, 20, 10, 10);
addRectangle(40, 20, 10, 10);
addRectangle(50, 20, 10, 10);
addRectangle(60, 20, 10, 10);
addRectangle(70, 20, 10, 10);
addRectangle(80, 20, 10, 10);
addRectangle(90, 20, 10, 10);
addRectangle(100, 20, 10, 10);
addRectangle(110, 20, 10, 10);
addRectangle(120, 20, 10, 10);
addRectangle(130, 20, 10, 10);
addRectangle(10, 30, 10, 10);
addRectangle(20, 30, 10, 10);
addRectangle(40, 30, 10, 10);
addRectangle(50, 30, 10, 10);
addRectangle(70, 30, 10, 10);
addRectangle(80, 30, 10, 10);
addRectangle(100, 30, 10, 10);
addRectangle(110, 30, 10, 10);
addRectangle(130, 30, 10, 10);
addRectangle(140, 30, 10, 10);
addRectangle(0, 40, 10, 10);
addRectangle(10, 40, 10, 10);
addRectangle(20, 40, 10, 10);
addRectangle(30, 40, 10, 10);
addRectangle(40, 40, 10, 10);
addRectangle(50, 40, 10, 10);
addRectangle(60, 40, 10, 10);
addRectangle(70, 40, 10, 10);
addRectangle(80, 40, 10, 10);
addRectangle(90, 40, 10, 10);
addRectangle(100, 40, 10, 10);
addRectangle(110, 40, 10, 10);
addRectangle(120, 40, 10, 10);
addRectangle(130, 40, 10, 10);
addRectangle(140, 40, 10, 10);
addRectangle(150, 40, 10, 10);
addRectangle(20, 50, 10, 10);
addRectangle(30, 50, 10, 10);
addRectangle(40, 50, 10, 10);
addRectangle(70, 50, 10, 10);
addRectangle(80, 50, 10, 10);
addRectangle(110, 50, 10, 10);
addRectangle(120, 50, 10, 10);
addRectangle(130, 50, 10, 10);
addRectangle(30, 60, 10, 10);
addRectangle(120, 60, 10, 10);
closePath();
}
}
}
这篇关于使用双缓冲有点毁了我的小程序.并且它有 java 使用或覆盖已弃用的 API的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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