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Return the contained value, if present, otherwise throw an exception to be
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A readable source of bytes.Most clients will use input streams that read data
from the file system (
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An immutable arbitrary-precision signed decimal.A value is represented by an
arbitrary-precision "un
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ResourceBundle is an abstract class which is the superclass of classes which
provide Locale-specifi
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A TimeUnit represents time durations at a given unit of granularity and provides
utility methods to
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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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A Window object is a top-level window with no borders and no menubar. The
default layout for a windo
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