| Package | Description | 
|---|---|
| java.util.concurrent.atomic | 
 A small toolkit of classes that support lock-free thread-safe
 programming on single variables. 
 | 
| java.util.function | 
 Functional interfaces provide target types for lambda expressions
 and method references. 
 | 
| java.util.stream | 
 Classes to support functional-style operations on streams of elements, such
 as map-reduce transformations on collections. 
 | 
| Modifier and Type | Method and Description | 
|---|---|
long | 
AtomicLongArray.getAndUpdate(int i,
            LongUnaryOperator updateFunction)
Atomically updates the element at index  
i with the results
 of applying the given function, returning the previous value. | 
long | 
AtomicLong.getAndUpdate(LongUnaryOperator updateFunction)
Atomically updates the current value with the results of
 applying the given function, returning the previous value. 
 | 
long | 
AtomicLongFieldUpdater.getAndUpdate(T obj,
            LongUnaryOperator updateFunction)
Atomically updates the field of the given object managed by this updater
 with the results of applying the given function, returning the previous
 value. 
 | 
long | 
AtomicLongArray.updateAndGet(int i,
            LongUnaryOperator updateFunction)
Atomically updates the element at index  
i with the results
 of applying the given function, returning the updated value. | 
long | 
AtomicLong.updateAndGet(LongUnaryOperator updateFunction)
Atomically updates the current value with the results of
 applying the given function, returning the updated value. 
 | 
long | 
AtomicLongFieldUpdater.updateAndGet(T obj,
            LongUnaryOperator updateFunction)
Atomically updates the field of the given object managed by this updater
 with the results of applying the given function, returning the updated
 value. 
 | 
| Modifier and Type | Method and Description | 
|---|---|
default LongUnaryOperator | 
LongUnaryOperator.andThen(LongUnaryOperator after)
Returns a composed operator that first applies this operator to
 its input, and then applies the  
after operator to the result. | 
default LongUnaryOperator | 
LongUnaryOperator.compose(LongUnaryOperator before)
Returns a composed operator that first applies the  
before
 operator to its input, and then applies this operator to the result. | 
static LongUnaryOperator | 
LongUnaryOperator.identity()
Returns a unary operator that always returns its input argument. 
 | 
| Modifier and Type | Method and Description | 
|---|---|
default LongUnaryOperator | 
LongUnaryOperator.andThen(LongUnaryOperator after)
Returns a composed operator that first applies this operator to
 its input, and then applies the  
after operator to the result. | 
default LongUnaryOperator | 
LongUnaryOperator.compose(LongUnaryOperator before)
Returns a composed operator that first applies the  
before
 operator to its input, and then applies this operator to the result. | 
| Modifier and Type | Method and Description | 
|---|---|
static LongStream | 
LongStream.iterate(long seed,
       LongUnaryOperator f)
Returns an infinite sequential ordered  
LongStream produced by iterative
 application of a function f to an initial element seed,
 producing a Stream consisting of seed, f(seed),
 f(f(seed)), etc. | 
LongStream | 
LongStream.map(LongUnaryOperator mapper)
Returns a stream consisting of the results of applying the given
 function to the elements of this stream. 
 | 
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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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