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Return the contained value, if present, otherwise throw an exception to be
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A BufferedInputStream adds functionality to another input stream-namely, the
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This class provides methods that return pseudo-random values.It is dangerous to
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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
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A Java virtual machine.
A VirtualMachine represents a Java virtual machine to which this Java vir
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