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An output stream that writes bytes to a file. If the output file exists, it can
be replaced or appen
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A PriorityQueue holds elements on a priority heap, which orders the elements
according to their natu
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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 reentrant mutual exclusion Lock with the same basic behavior and semantics as
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JarFile is used to read jar entries and their associated data from jar files.
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A point representing a location in (x,y) coordinate space, specified in integer
precision.
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