利用JAVA SWING 编程,要在当前窗体中显示如下信息提示框,则需要编写的代码 是( )。
A.
JOptionPane.showMessageDialog(null," 请输入登陆名! "," 提示信息 ",JOptionPane.CLOSED_OPTION) ;
B.
newJOptionPane.showMessageDialog(null," 请输入登陆名! "," 提示信息 ",JOptionPane.CLOSED_OPTION) ;
C.
newJOptionPane.messageDialog(null," 请输入登陆名! "," 提示信息 ",JOptionPane.CLOSED_OPTION) ;
D.
JOptionPane.messageDialog(null," 请输入登陆名! "," 提示信息 ",JOptionPane.CLOSED_OPTION);