我正在寻找使用线程创建一个简单的2D动画。一旦线程启动,我就无法确定在run方法中输入的内容。现在,Particle类的对象被绘制在框架上,但没有动画。此外,我可以使用您的帮助来解决当用户关闭框架时如何关闭线程
public class ParticleFieldWithThread extends JPanel implements Runnable{
private ArrayList<Particle> particle = new ArrayList<Particle>();
boolean runnable;
public ParticleFieldWithThread (){
this.setPreferredSize(new Dimension(500,500));
for(int i = 0; i < 100; i++) {
particle.add(new Particle());
}
Thread t1 = new Thread();
t1.start();
}
public void run () {
while (true ) {
try {
Thread.sleep(40);
for (Particle p : particle) {
p.move();
}
repaint();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
g2.setColor(Color.RED);
for (Particle p : particle) {
g2.fill(new Rectangle2D.Double(p.getX(), p.getY(), 3, 3));
}
}
public static void main(String[] args) {
final JFrame f = new JFrame("ParticleField");
final ParticleFieldWithThread bb = new ParticleFieldWithThread();
f.setLayout(new FlowLayout());
f.add(bb);
f.pack();
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
这是粒子类
public class Particle {
private double x , y ;
Random r = new Random();
public Particle () {
x = r.nextDouble()*500;
y = r.nextDouble()*500;
}
public double getX() {
return x;
}
public double getY() {
return y;
}
public void move() {
x += r.nextBoolean() ? 1 : - 1;
y += r.nextBoolean() ? 1 : - 1;
//System.out.println("x : " + x+" y: " + y);
}
}
答案 0 :(得分:4)
这没有任何用处:
Thread t1 = new Thread();
t1.start();
你需要将一个Runnable(在你的代码中,它将是类的当前对象,this
)传递给Thread的构造函数,以使其具有任何含义或功能。即,
Thread t1 = new Thread(this);
t1.start();
对于我的钱,我会做一些完全不同的事情,并会使用Swing Timer进行简单的Swing动画。