@ParametersAreNonnullByDefault

Package com.google.common.base

Basic utility libraries and interfaces.

This package is a part of the open-source Guava libraries.

Contents

String-related utilities

• Ascii
• CaseFormat
• CharMatcher
• Charsets
• Joiner
• Splitter
• Strings

Function types

• Function, Functions
• Predicate, Predicates
• Equivalence
• Supplier, Suppliers

Other

• Defaults
• Enums
• Objects
• Optional
• Preconditions
• Stopwatch
• Throwables

Interface Summary

Interface	Description
FinalizableReference	Implemented by references that have code to run after garbage collection of their referents.
Function<F,T>	Determines an output value based on an input value.
Predicate<T>	Determines a true or false value for a given input.
Supplier<T>	A class that can supply objects of a single type.

Class Summary

Class	Description
Ascii	Static methods pertaining to ASCII characters (those in the range of values 0x00 through 0x7F), and to strings containing such characters.
CharMatcher	Determines a true or false value for any Java char value, just as Predicate does for any Object.
Charsets	Contains constant definitions for the six standard Charset instances, which are guaranteed to be supported by all Java platform implementations.
Defaults	This class provides default values for all Java types, as defined by the JLS.
Enums	Utility methods for working with Enum instances.
Equivalence<T>	A strategy for determining whether two instances are considered equivalent.
Equivalence.Wrapper<T>	Wraps an object so that Equivalence.Wrapper.equals(Object) and Equivalence.Wrapper.hashCode() delegate to an Equivalence.
FinalizablePhantomReference<T>	Phantom reference with a finalizeReferent() method which a background thread invokes after the garbage collector reclaims the referent.
FinalizableReferenceQueue	A reference queue with an associated background thread that dequeues references and invokes FinalizableReference.finalizeReferent() on them.
FinalizableSoftReference<T>	Soft reference with a finalizeReferent() method which a background thread invokes after the garbage collector reclaims the referent.
FinalizableWeakReference<T>	Weak reference with a finalizeReferent() method which a background thread invokes after the garbage collector reclaims the referent.
Functions	Static utility methods pertaining to Function instances.
Joiner	An object which joins pieces of text (specified as an array, Iterable, varargs or even a Map) with a separator.
Joiner.MapJoiner	An object that joins map entries in the same manner as Joiner joins iterables and arrays.
Objects	Helper functions that can operate on any Object.
Objects.ToStringHelper	Support class for Objects.toStringHelper(java.lang.Object).
Optional<T>	An immutable object that may contain a non-null reference to another object.
Preconditions	Simple static methods to be called at the start of your own methods to verify correct arguments and state.
Predicates	Static utility methods pertaining to Predicate instances.
Splitter	Extracts non-overlapping substrings from an input string, typically by recognizing appearances of a separator sequence.
Splitter.MapSplitter	An object that splits strings into maps as Splitter splits iterables and lists.
Stopwatch	An object that measures elapsed time in nanoseconds.
Strings	Static utility methods pertaining to String or CharSequence instances.
Suppliers	Useful suppliers.
Throwables	Static utility methods pertaining to instances of Throwable.
Ticker	A time source; returns a time value representing the number of nanoseconds elapsed since some fixed but arbitrary point in time.

Enum Summary

Enum	Description
CaseFormat	Utility class for converting between various ASCII case formats.
StandardSystemProperty	Represents a standard system property.