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Return the contained value, if present, otherwise throw an exception to be
created by the provided s
- URL (java.net)
A Uniform Resource Locator that identifies the location of an Internet resource
as specified by RFC
- DecimalFormat (java.text)
A concrete subclass of NumberFormat that formats decimal numbers. It has a
variety of features desig
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A collection designed for holding elements prior to processing. Besides basic
java.util.Collection o
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A task that returns a result and may throw an exception. Implementors define a
single method with no
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This is the central class in the log4j package. Most logging operations, except
configuration, are d
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