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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.
参考答案
更多 “ 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
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
考题
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
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