| Package | Description | 
|---|---|
| java.awt | 
 Contains all of the classes for creating user
interfaces and for painting graphics and images. 
 | 
| java.io | 
 Provides for system input and output through data streams,
serialization and the file system. 
 | 
| java.lang | 
 Provides classes that are fundamental to the design of the Java
 programming language. 
 | 
| java.nio.file | 
 Defines interfaces and classes for the Java virtual machine to access files,
 file attributes, and file systems. 
 | 
| java.time.temporal | 
 
 Access to date and time using fields and units, and date time adjusters. 
 | 
| java.util | 
 Contains the collections framework, legacy collection classes, event model,
date and time facilities, internationalization, and miscellaneous utility
classes (a string tokenizer, a random-number generator, and a bit array). 
 | 
| java.util.concurrent | 
 Utility classes commonly useful in concurrent programming. 
 | 
| java.util.function | 
 Functional interfaces provide target types for lambda expressions
 and method references. 
 | 
| java.util.logging | 
 
Provides the classes and interfaces of 
the JavaTM 2
 platform's core logging facilities. 
 | 
| java.util.prefs | 
 This package allows applications to store and retrieve user and system
preference and configuration data. 
 | 
| Modifier and Type | Interface and Description | 
|---|---|
interface  | 
KeyEventDispatcher
A KeyEventDispatcher cooperates with the current KeyboardFocusManager in the
 targeting and dispatching of all KeyEvents. 
 | 
interface  | 
KeyEventPostProcessor
A KeyEventPostProcessor cooperates with the current KeyboardFocusManager
 in the final resolution of all unconsumed KeyEvents. 
 | 
| Modifier and Type | Interface and Description | 
|---|---|
interface  | 
FileFilter
A filter for abstract pathnames. 
 | 
interface  | 
FilenameFilter
Instances of classes that implement this interface are used to
 filter filenames. 
 | 
| Modifier and Type | Interface and Description | 
|---|---|
interface  | 
Runnable
The  
Runnable interface should be implemented by any
 class whose instances are intended to be executed by a thread. | 
static interface  | 
Thread.UncaughtExceptionHandler
Interface for handlers invoked when a Thread abruptly
 terminates due to an uncaught exception. 
 | 
| Modifier and Type | Interface and Description | 
|---|---|
static interface  | 
DirectoryStream.Filter<T>
An interface that is implemented by objects that decide if a directory
 entry should be accepted or filtered. 
 | 
interface  | 
PathMatcher
An interface that is implemented by objects that perform match operations on
 paths. 
 | 
| Modifier and Type | Interface and Description | 
|---|---|
interface  | 
TemporalAdjuster
Strategy for adjusting a temporal object. 
 | 
interface  | 
TemporalQuery<R>
Strategy for querying a temporal object. 
 | 
| Modifier and Type | Interface and Description | 
|---|---|
interface  | 
Comparator<T>
A comparison function, which imposes a total ordering on some
 collection of objects. 
 | 
| Modifier and Type | Interface and Description | 
|---|---|
interface  | 
Callable<V>
A task that returns a result and may throw an exception. 
 | 
| Modifier and Type | Interface and Description | 
|---|---|
interface  | 
BiConsumer<T,U>
Represents an operation that accepts two input arguments and returns no
 result. 
 | 
interface  | 
BiFunction<T,U,R>
Represents a function that accepts two arguments and produces a result. 
 | 
interface  | 
BinaryOperator<T>
Represents an operation upon two operands of the same type, producing a result
 of the same type as the operands. 
 | 
interface  | 
BiPredicate<T,U>
Represents a predicate (boolean-valued function) of two arguments. 
 | 
interface  | 
BooleanSupplier
Represents a supplier of  
boolean-valued results. | 
interface  | 
Consumer<T>
Represents an operation that accepts a single input argument and returns no
 result. 
 | 
interface  | 
DoubleBinaryOperator
Represents an operation upon two  
double-valued operands and producing a
 double-valued result. | 
interface  | 
DoubleConsumer
Represents an operation that accepts a single  
double-valued argument and
 returns no result. | 
interface  | 
DoubleFunction<R>
Represents a function that accepts a double-valued argument and produces a
 result. 
 | 
interface  | 
DoublePredicate
Represents a predicate (boolean-valued function) of one  
double-valued
 argument. | 
interface  | 
DoubleSupplier
Represents a supplier of  
double-valued results. | 
interface  | 
DoubleToIntFunction
Represents a function that accepts a double-valued argument and produces an
 int-valued result. 
 | 
interface  | 
DoubleToLongFunction
Represents a function that accepts a double-valued argument and produces a
 long-valued result. 
 | 
interface  | 
DoubleUnaryOperator
Represents an operation on a single  
double-valued operand that produces
 a double-valued result. | 
interface  | 
Function<T,R>
Represents a function that accepts one argument and produces a result. 
 | 
interface  | 
IntBinaryOperator
Represents an operation upon two  
int-valued operands and producing an
 int-valued result. | 
interface  | 
IntConsumer
Represents an operation that accepts a single  
int-valued argument and
 returns no result. | 
interface  | 
IntFunction<R>
Represents a function that accepts an int-valued argument and produces a
 result. 
 | 
interface  | 
IntPredicate
Represents a predicate (boolean-valued function) of one  
int-valued
 argument. | 
interface  | 
IntSupplier
Represents a supplier of  
int-valued results. | 
interface  | 
IntToDoubleFunction
Represents a function that accepts an int-valued argument and produces a
 double-valued result. 
 | 
interface  | 
IntToLongFunction
Represents a function that accepts an int-valued argument and produces a
 long-valued result. 
 | 
interface  | 
IntUnaryOperator
Represents an operation on a single  
int-valued operand that produces
 an int-valued result. | 
interface  | 
LongBinaryOperator
Represents an operation upon two  
long-valued operands and producing a
 long-valued result. | 
interface  | 
LongConsumer
Represents an operation that accepts a single  
long-valued argument and
 returns no result. | 
interface  | 
LongFunction<R>
Represents a function that accepts a long-valued argument and produces a
 result. 
 | 
interface  | 
LongPredicate
Represents a predicate (boolean-valued function) of one  
long-valued
 argument. | 
interface  | 
LongSupplier
Represents a supplier of  
long-valued results. | 
interface  | 
LongToDoubleFunction
Represents a function that accepts a long-valued argument and produces a
 double-valued result. 
 | 
interface  | 
LongToIntFunction
Represents a function that accepts a long-valued argument and produces an
 int-valued result. 
 | 
interface  | 
LongUnaryOperator
Represents an operation on a single  
long-valued operand that produces
 a long-valued result. | 
interface  | 
ObjDoubleConsumer<T>
Represents an operation that accepts an object-valued and a
  
double-valued argument, and returns no result. | 
interface  | 
ObjIntConsumer<T>
Represents an operation that accepts an object-valued and a
  
int-valued argument, and returns no result. | 
interface  | 
ObjLongConsumer<T>
Represents an operation that accepts an object-valued and a
  
long-valued argument, and returns no result. | 
interface  | 
Predicate<T>
Represents a predicate (boolean-valued function) of one argument. 
 | 
interface  | 
Supplier<T>
Represents a supplier of results. 
 | 
interface  | 
ToDoubleBiFunction<T,U>
Represents a function that accepts two arguments and produces a double-valued
 result. 
 | 
interface  | 
ToDoubleFunction<T>
Represents a function that produces a double-valued result. 
 | 
interface  | 
ToIntBiFunction<T,U>
Represents a function that accepts two arguments and produces an int-valued
 result. 
 | 
interface  | 
ToIntFunction<T>
Represents a function that produces an int-valued result. 
 | 
interface  | 
ToLongBiFunction<T,U>
Represents a function that accepts two arguments and produces a long-valued
 result. 
 | 
interface  | 
ToLongFunction<T>
Represents a function that produces a long-valued result. 
 | 
interface  | 
UnaryOperator<T>
Represents an operation on a single operand that produces a result of the
 same type as its operand. 
 | 
| Modifier and Type | Interface and Description | 
|---|---|
interface  | 
Filter
A Filter can be used to provide fine grain control over
 what is logged, beyond the control provided by log levels. 
 | 
| Modifier and Type | Interface and Description | 
|---|---|
interface  | 
PreferenceChangeListener
A listener for receiving preference change events. 
 | 
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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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