单选题：Java中某GUI程序实现幻灯片放映，阅读以下程序并填空。

某Java GUI应用程序实现幻灯片放映，在构造方法中将幻灯片读入数组中存储和注册鼠标监听器。程序运行时单击鼠标，就顺序地变换放映幻灯片的序号。这里给出的部分代码，请填空补充相应的代码。

class SliderPanel extends JPanel{
final int number=30;//假定幻灯片有30张
int count=0;
Image[] pic=new Image[number];
/*
构造方法定义...
*/
public void _____________________{
if((pic[count]!=null)
gc.drawImage(pic[count],10,10,pic[count].getWidth(this),pic[count].getHeight(this),this);
}
public void mousePressed(MouseEvent e){
count=(count+1)%number; //循环逐张显示
___________________;
}
....
}




A.paint(Graphics gc)<br>
repaint()
B.paintComponent(Graphics gc)<br>
repaint()
C.paint(Graphics gc)<br>
paint()
D.paintComponent(Graphics gc)<br>
paintComponent()


答案：A