这个程序为什么通过不了编译？关于Graphics2D的问题

Question

楼主应该是大小写的问题吧
<applet code="shapeDemo",width=400 height=300></applet>
中code="ShapeDemo"

Answer 1

下面就是出错信息
ShapeDemo.java:6: cannot resolve symbol
symbol  : class JApplet
location: class ShapeDemo
public class ShapeDemo extends JApplet
                               ^
ShapeDemo.java:11: incompatible types
found   : java.awt.geom.Ellipse2D.Double
required: Shape
        Shape shape1 = new Ellipse2D.Double(20.0, 45.0, 30.0, 30.);
                       ^
ShapeDemo.java:12: incompatible types
found   : java.awt.geom.Rectangle2D.Double
required: Shape
        Shape shape2 = new Rectangle2D.Double(35.0, 35.0, 30.0, 30.0);
                       ^
ShapeDemo.java:14: draw(java.awt.Shape) in java.awt.Graphics2D cannot be applied
 to (Shape)
        g2.draw(shape1);
          ^
ShapeDemo.java:15: draw(java.awt.Shape) in java.awt.Graphics2D cannot be applied
 to (Shape)
        g2.draw(shape2);
          ^
5 errors