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("色彩應(yīng)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">這是我按照書上一點(diǎn)一點(diǎn)敲出來(lái)的，但是還是出現(xiàn)了以上的錯(cuò)誤，我將我寫的代碼復(fù)制粘貼下來(lái)，大家?guī)臀铱纯丛趺葱薷?，謝謝了！<p?dir="ltr">