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Hashtable methods

 
Greenhorn
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We know that Hashtable is synchronized. But not all the Hashtable methods are synchronized. Why?
 
Ranch Hand
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because they don't access shared data.
There's seldom a good reason to use a Hashtable anyway.
 
Ranch Hand
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There's seldom a good reason to use a Hashtable anyway.

why is that?
 
Greenhorn
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The HashMap class is roughly equivalent to Hashtable, except that it is unsynchronized and permits nulls.

http://java.sun.com/j2se/1.4.2/docs/api/java/util/HashMap.html

https://coderanch.com/t/231485/threads/java/Hashtable-vs-HashMap
 
Greenhorn
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用打包的办法
 
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