下列标准 File 类构造方法的使用示例中,不正确的是
A.
File dir = new File("c:\\myjava"); File file = new File(dir, "demo.java");
B.
File file = new File("c:\\myjava"," demo.java ") ;
C.
File file = new File("c:\\myjava\\demo.java ") ;
D.
File file = new File("c:\myjava\demo.java ") ;