阅读下面Applet程序import javax.swing.*:import java.awt.*:public Class Test SwingApplet ext
阅读下面Applet程序 import javax.swing.*: import java.awt.*: public Class Test SwingApplet extends JApplet { JLabel 1=new JLabel("This is a Swing Applet."); public void init() { ______ } } 程序中下画线处应填入的正确选项是
A.Container contentPane=getContentPane();contentPane.add(1);
B.Jpanel contentPane=new JPanel();contentPane.add(1);
C.contentPane.add(1);
D.add(1);