下列JApplet使用重写paintComponet()方法来绘制图像，请填写正确的代码在横线处。 import java.awt.*; import javax.swing.*; public class Test extends JApplet { staic String fileName = 'IMG nClick=over(this) title=放大().gif'; public void init() { Container cp = getContentPane(); cp.setLayout(new GridLayout(1,1)); Image i = getImage(getCodeBase(),fileName); MyImagePanel ip=new MyInmagePanel(i); cp.add(ip); } } class MyImagePanel extends JPanel { Image i; public MyImagePanel(Image IMG nClick=over(this) title=放大) { this.i = IMG nClick=over(this) title=放大; } public void paintComponent(Graphics gg) { 【 】; gg.drawImage(i,20,20,this); } }