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- orElseThrow (Optional)
Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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- System (java.lang)
Provides access to system-related information and resources including standard
input and output. Ena
- KeyStore (java.security)
KeyStore is responsible for maintaining cryptographic keys and their owners.
The type of the syste
- Scanner (java.util)
A parser that parses a text string of primitive types and strings with the help
of regular expressio
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A reentrant mutual exclusion Lock with the same basic behavior and semantics as
the implicit monitor
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General IO stream manipulation utilities. This class provides static utility
methods for input/outpu
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The LoggerFactory is a utility class producing Loggers for various logging APIs,
most notably for lo
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