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 onClick=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 onClick=over(this) title=放大){this.i = IMG onClick=over(this) title=放大;}public void paintComponent(Graphics gg){【15】 ;gg.drawImage(i,20,20,this);} }