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- orElseThrow (Optional)
Return the contained value, if present, otherwise throw an exception to be
created by the provided s
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A class for turning a byte stream into a character stream. Data read from the
source input stream is
- DecimalFormat (java.text)
A concrete subclass of NumberFormat that formats decimal numbers. It has a
variety of features desig
- HashSet (java.util)
HashSet is an implementation of a Set. All optional operations (adding and
removing) are supported.
- Map (java.util)
A Map is a data structure consisting of a set of keys and values in which each
key is mapped to a si
- ResourceBundle (java.util)
ResourceBundle is an abstract class which is the superclass of classes which
provide Locale-specifi
- Logger (org.apache.log4j)
This is the central class in the log4j package. Most logging operations, except
configuration, are d
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