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A connection to a URL for reading or writing. For HTTP connections, see
HttpURLConnection for docume
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Uses a one-way hash function to turn an arbitrary number of bytes into a
fixed-length byte sequence.
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A Set is a data structure which does not allow duplicate elements.
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A map that has its keys ordered. The sorting is according to either the natural
ordering of its keys
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A task that returns a result and may throw an exception. Implementors define a
single method with no
- ConcurrentHashMap (java.util.concurrent)
A plug-in replacement for JDK1.5 java.util.concurrent.ConcurrentHashMap. This
version is based on or
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