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Return the contained value, if present, otherwise throw an exception to be
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A linear collection that supports element insertion and removal at both ends.
The name deque is shor
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Walk the nodes of the tree left-to-right or right-to-left. Note that in
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Operations on java.lang.String that arenull safe.
* IsEmpty/IsBlank - checks if a String contains
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The Color class is used to encapsulate colors in the default sRGB color space or
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A filter is an object that performs filtering tasks on either the request to a
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