我正在做一个项目，让一辆汽车在屏幕上移动。我制作了这辆车，但是当我编辑代码以便我可以多次调用这辆车时（把它放在一个类中），它现在只给我一个空白屏幕或者“找不到符号画家组件”错误。把它放为：

• super. PureComponent（g）告诉我找不到符号。
• DrawCar. super.PureComponent（g）告诉我找不到符号。（在查看其他错误后尝试了这个）。
• DrawCar. pintComponent（g）告诉我“错误：无法从静态上下文引用非静态方法pintComponent（Graphics）”
• 画布组件（g）编译但给我一个空白屏幕。
• 删除它会完全编译，但会给我一个空白屏幕。

这是我的代码：

   import java.awt.Graphics;
   import java.awt.Polygon;
   import java.awt.Color;
   import javax.swing.*;


public class CarDriver extends JPanel
{
public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                JFrame frame = new JFrame();
                frame.add(new Car());
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.pack();
                frame.setSize(800, 800);
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);
            }
        });
    }
}

   import java.awt.*;
   import javax.swing.*;

   public class Car extends JPanel
   {
       drawCar car = new drawCar(200);
       private static final int D_W = 400;
       private static final int D_H = 400;


    public class drawCar
    {
        private static final int INCREMENT = 5;
        int x;

        public drawCar(int x)
        {
            x = x;
        }

    public void paintComponent( Graphics g )
    {
        drawCar.paintComponent(g);
       // body of the car
       g.setColor(Color.blue);
       int xValues[] = { x + 80, x + 80, x + 180, x + 180};
       int yValues[] = { 60, 120, 120, 60};
       Polygon polygon1 = new Polygon( xValues, yValues, 4 );
       g.fillPolygon( polygon1 );

        //hood / front end of car
       int xValues2[] = {x + 180, x + 200, x + 200};
       int yValues2[] = {60, 60, 90};
       g.drawPolyline( xValues2, yValues2, 3);
       int xValues2a[] = {x + 180, x + 180, x + 220, x + 220};
       int yValues2a[] = {90, 120, 120, 90};
       Polygon polygon3 = new Polygon( xValues2a, yValues2a, 4);
       g.fillPolygon ( polygon3);

       //cartop
       g.setColor(Color.black);
       int xValues3[] = {x + 90, x + 90, x +  170, x + 170};
       int yValues3[] = {45, 60, 60, 45};
       Polygon polygon2 = new Polygon(xValues3, yValues3, 4);
       g.fillPolygon(polygon2);

        //wheels
       g.fillOval(x + 80, 100, 35, 35);
       g.fillOval(x + 180, 100, 35, 35);


    }
   }
 }