A.toString() B.equals(Objecto) C.public static void main(String[]args) D.System.out.println() E.wait()
A.RandomAccessFile(new File("D:\\myex\\dir1\\..\\test.java"),"rw") B.RandomAccessFile("D:\\myex\\test.java","r") C.RandomAccessFile("D:\\myex\\test.java") D.RandomAccessFile("D:\\myex\\test.java","wr")
A.文件 B.目錄 C.輸入流 D.輸出流