Java 计时器未在JPanel中启动
我试图在JPanel中移动一个图像，静态变量x和y是使用opencv在另一个类中更改的红色坐标。这里计时器没有启动。请告诉我哪里错了Java 计时器未在JPanel中启动,java,swing,timer,Java,Swing,Timer,我试图在JPanel中移动一个图像，静态变量x和y是使用opencv在另一个类中更改的红色坐标。这里计时器没有启动。请告诉我哪里错了 class ImageFollowingPanel extends JPanel { private final BufferedImage image; private Point imagePosition = new Point(150, 150); private Point redPoint; private doubl
class ImageFollowingPanel extends JPanel
{
private final BufferedImage image;
private Point imagePosition = new Point(150, 150);
private Point redPoint;
private double imageAngleRad = 0;
public static int x, y;
public ImageFollowingPanel()
{
BufferedImage i = null;
try
{
i = ImageIO.read(new File("forward.png"));
}
catch (IOException e)
{
e.printStackTrace();
}
image = i;
ActionListener taskPerformer = new ActionListener()
{
public void actionPerformed(ActionEvent evt)
{
if (redPoint != null)
{
int centerX = imagePosition.x + (image.getWidth() / 2);
int centerY = imagePosition.y + (image.getHeight() / 2);
if (redPoint.x != centerX)
{
imagePosition.x += redPoint.x < centerX ? -1 : 1;
}
if (redPoint.y != centerY)
{
imagePosition.y += redPoint.y < centerY ? -1 : 1;
}
System.out.println("mouse::: x : " + x + "y :" + y);
redPoint.x = x;
redPoint.y = y;
double dx = x - imagePosition.getX();
double dy = y - imagePosition.getY();
imageAngleRad = Math.atan2(dy, dx);
repaint();
}
}
};
Timer timer = new Timer(1000, taskPerformer);
timer.start();
}
protected void paintComponent(Graphics gr)
{
super.paintComponent(gr);
Graphics2D g = (Graphics2D) gr;
g.setRenderingHint(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_QUALITY);
int cx = image.getWidth() / 2;
int cy = image.getHeight() / 2;
AffineTransform oldAT = g.getTransform();
g.translate(cx + imagePosition.x, cy + imagePosition.y);
g.rotate(imageAngleRad);
g.translate(-cx, -cy);
g.drawImage(image, 0, 0, null);
g.setTransform(oldAT);
}
}
class ImageFollowPanel扩展了JPanel
{
私有最终缓冲图像；
专用点imagePosition=新点（150150）；
私人红点；
专用双映像角度rad=0；
公共静态int x，y；
公共事务委员会（）
{
BuffereImage i=null；
尝试
{
i=ImageIO.read（新文件（“forward.png”）；
}
捕获（IOE异常）
{
e、 printStackTrace（）；
}
图像=i；
ActionListener taskPerformer=新建ActionListener（）
{
已执行的公共无效操作（操作事件evt）
{
如果（红点！=null）
{
int centerX=imagePosition.x+（image.getWidth（）/2）；
int centerY=imagePosition.y+（image.getHeight（）/2）；
如果（redPoint.x！=centerX）
{
imagePosition.x+=redPoint.x红点