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The BitSet class implements abit array [http://en.wikipedia.org/wiki/Bit_array].
Each element is eit
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A PriorityQueue holds elements on a priority heap, which orders the elements
according to their natu
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Operations on java.lang.String that arenull safe.
* IsEmpty/IsBlank - checks if a String contains
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The GridBagLayout class is a flexible layout manager that aligns components
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A Rectangle specifies an area in a coordinate space that is enclosed by the
Rectangle object's top-
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