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Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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- String (java.lang)
- ArrayList (java.util)
ArrayList is an implementation of List, backed by an array. All optional
operations including adding
- Dictionary (java.util)
Note: Do not use this class since it is obsolete. Please use the Map interface
for new implementatio
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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 Set is a data structure which does not allow duplicate elements.
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A reentrant mutual exclusion Lock with the same basic behavior and semantics as
the implicit monitor
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