阅读下面Applet程序import javax. swing. *;import java. awt. *; public class SwintgApplet extends JApplet{ JLabel 1=new JLabel("This is a Swing Applet."); public void init(){ ________________________________ } } 在程序下画线处填入正确的选项是
A．Container contentPane=getContenPane(); cotentPan add(1);
B．JPanel comtenPane=new Jpane(); contentPan add(1);
C．contentPan add(1);
D．add(1);
