you have recently written the code shown below:Hashtable emailAddresses = new Hashtable ();emailAddresses.Add (Mia, mia@ Certkiller .com);emailAddresses.Add (Andy, andy@ Certkiller .com);emailAddresses.Add (Kara, kara@ Certkiller .com);You need to ensure that these e-mail addresses are stored in the Email.dat file so that you can load them againwhen the user restarts the application.What should you do?（）A.B.C.D.
you have recently written the code shown below:Hashtable emailAddresses = new Hashtable ();emailAddresses.Add ("Mia", "mia@ Certkiller .com");emailAddresses.Add ("Andy", "andy@ Certkiller .com");emailAddresses.Add ("Kara", "kara@ Certkiller .com");You need to ensure that these e-mail addresses are stored in the Email.dat file so that you can load them againwhen the user restarts the application.What should you do?（）
A.
B.
C.
D.
相关考题：
HashMap和Hashtable正确的说法有() A.都属于Map接口的类B.Hashtable类不是同步的，HashMap类是同步的C.Hashtable类不允许null键和null值D.HashMap类允许null键和null值
关于Java语言Hashtable，表述正确的有（）。A．Hashtable允许空（null）键值（key）B．Hashtable的方法是Synchronize的C．Hashtable继承自Dictionary类D．Hashtable支持Null value