关于java绘制不同色彩的图形

Question

package java01;

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

public class java4{
public void paintComponent(Graphics g){
super.painComponent(g);
Graphics2D g2 = (Graphics2D) g;

float width = getSize().width-10;
float Height= getsize().height/3-10;

g2.setPaint(Color.red);
g2.draw(new Line2D.Float(5,5,5+Width,5+Height));
g2.draw(new Line2D.Float(5,5+Height,5+Width,5));

g2.setPaint(new Color(192,128,64));
g2.fill(new Rectangle2D.Float(5,10+Height,Width,Height));

g2.fill(new Gradientpaint(5,5,Color.blue,5+Width,5,Color.yellow));
g2.fill(new Ellipse2D.Float(5,20+2*Height,Width,Height));
}

public static void main(String [] argv){
	JFrame f=new JFrame("色彩应用");
	ColorShape p=new ColorShape();
	p.setBackground(color.white);
	f.getContentPane().add(p);
	f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	f.setSize(640,480);
	f.setVisible(true);
}
	
}

<p dir="ltr">这是我按照书上一点一点敲出来的，但是还是出现了以上的错误，我将我写的代码复制粘贴下来，大家帮我看看怎么修改，谢谢了！<p dir="ltr">