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This class represents a server-side socket that waits for incoming client
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Doubly-linked list implementation of the List and Dequeinterfaces. Implements
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This class provides methods that return pseudo-random values.It is dangerous to
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A Set is a data structure which does not allow duplicate elements.
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Patterns are compiled regular expressions. In many cases, convenience methods
such as String#matches
- StringUtils (org.apache.commons.lang)
Operations on java.lang.String that arenull safe.
* IsEmpty/IsBlank - checks if a String contains
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