| Package | Description | 
|---|---|
| java.security | Provides the classes and interfaces for the security framework. | 
| 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.stream | Classes to support functional-style operations on streams of elements, such
 as map-reduce transformations on collections. | 
| Modifier and Type | Method and Description | 
|---|---|
| Object | Provider. compute(Object key,
       BiFunction<? super Object,? super Object,? extends Object> remappingFunction)Attempts to compute a mapping for the specified key and its
 current mapped value (or  nullif there is no current
 mapping). | 
| Object | Provider. computeIfPresent(Object key,
                BiFunction<? super Object,? super Object,? extends Object> remappingFunction)If the value for the specified key is present and non-null, attempts to
 compute a new mapping given the key and its current mapped value. | 
| Object | Provider. merge(Object key,
     Object value,
     BiFunction<? super Object,? super Object,? extends Object> remappingFunction)If the specified key is not already associated with a value or is
 associated with null, associates it with the given value. | 
| void | Provider. replaceAll(BiFunction<? super Object,? super Object,? extends Object> function)Replaces each entry's value with the result of invoking the given
 function on that entry, in the order entries are returned by an entry
 set iterator, until all entries have been processed or the function
 throws an exception. | 
| Modifier and Type | Method and Description | 
|---|---|
| V | Hashtable. compute(K key,
       BiFunction<? super K,? super V,? extends V> remappingFunction) | 
| default V | Map. compute(K key,
       BiFunction<? super K,? super V,? extends V> remappingFunction)Attempts to compute a mapping for the specified key and its current
 mapped value (or  nullif there is no current mapping). | 
| V | HashMap. compute(K key,
       BiFunction<? super K,? super V,? extends V> remappingFunction) | 
| V | Hashtable. computeIfPresent(K key,
                BiFunction<? super K,? super V,? extends V> remappingFunction) | 
| default V | Map. computeIfPresent(K key,
                BiFunction<? super K,? super V,? extends V> remappingFunction)If the value for the specified key is present and non-null, attempts to
 compute a new mapping given the key and its current mapped value. | 
| V | HashMap. computeIfPresent(K key,
                BiFunction<? super K,? super V,? extends V> remappingFunction) | 
| V | Hashtable. merge(K key,
     V value,
     BiFunction<? super V,? super V,? extends V> remappingFunction) | 
| default V | Map. merge(K key,
     V value,
     BiFunction<? super V,? super V,? extends V> remappingFunction)If the specified key is not already associated with a value or is
 associated with null, associates it with the given non-null value. | 
| V | HashMap. merge(K key,
     V value,
     BiFunction<? super V,? super V,? extends V> remappingFunction) | 
| void | Hashtable. replaceAll(BiFunction<? super K,? super V,? extends V> function) | 
| default void | Map. replaceAll(BiFunction<? super K,? super V,? extends V> function)Replaces each entry's value with the result of invoking the given
 function on that entry until all entries have been processed or the
 function throws an exception. | 
| void | LinkedHashMap. replaceAll(BiFunction<? super K,? super V,? extends V> function) | 
| void | WeakHashMap. replaceAll(BiFunction<? super K,? super V,? extends V> function) | 
| void | IdentityHashMap. replaceAll(BiFunction<? super K,? super V,? extends V> function) | 
| void | HashMap. replaceAll(BiFunction<? super K,? super V,? extends V> function) | 
| void | TreeMap. replaceAll(BiFunction<? super K,? super V,? extends V> function) | 
| Modifier and Type | Method and Description | 
|---|---|
| default V | ConcurrentMap. compute(K key,
       BiFunction<? super K,? super V,? extends V> remappingFunction)Attempts to compute a mapping for the specified key and its current
 mapped value (or  nullif there is no current mapping). | 
| V | ConcurrentSkipListMap. compute(K key,
       BiFunction<? super K,? super V,? extends V> remappingFunction)Attempts to compute a mapping for the specified key and its
 current mapped value (or  nullif there is no current
 mapping). | 
| V | ConcurrentHashMap. compute(K key,
       BiFunction<? super K,? super V,? extends V> remappingFunction)Attempts to compute a mapping for the specified key and its
 current mapped value (or  nullif there is no current
 mapping). | 
| default V | ConcurrentMap. computeIfPresent(K key,
                BiFunction<? super K,? super V,? extends V> remappingFunction)If the value for the specified key is present and non-null, attempts to
 compute a new mapping given the key and its current mapped value. | 
| V | ConcurrentSkipListMap. computeIfPresent(K key,
                BiFunction<? super K,? super V,? extends V> remappingFunction)If the value for the specified key is present, attempts to
 compute a new mapping given the key and its current mapped
 value. | 
| V | ConcurrentHashMap. computeIfPresent(K key,
                BiFunction<? super K,? super V,? extends V> remappingFunction)If the value for the specified key is present, attempts to
 compute a new mapping given the key and its current mapped
 value. | 
| <U> void | ConcurrentHashMap. forEach(long parallelismThreshold,
       BiFunction<? super K,? super V,? extends U> transformer,
       Consumer<? super U> action)Performs the given action for each non-null transformation
 of each (key, value). | 
| <U> CompletableFuture<U> | CompletableFuture. handle(BiFunction<? super T,Throwable,? extends U> fn) | 
| <U> CompletionStage<U> | CompletionStage. handle(BiFunction<? super T,Throwable,? extends U> fn)Returns a new CompletionStage that, when this stage completes
 either normally or exceptionally, is executed with this stage's
 result and exception as arguments to the supplied function. | 
| <U> CompletableFuture<U> | CompletableFuture. handleAsync(BiFunction<? super T,Throwable,? extends U> fn) | 
| <U> CompletionStage<U> | CompletionStage. handleAsync(BiFunction<? super T,Throwable,? extends U> fn)Returns a new CompletionStage that, when this stage completes
 either normally or exceptionally, is executed using this stage's
 default asynchronous execution facility, with this stage's
 result and exception as arguments to the supplied function. | 
| <U> CompletableFuture<U> | CompletableFuture. handleAsync(BiFunction<? super T,Throwable,? extends U> fn,
           Executor executor) | 
| <U> CompletionStage<U> | CompletionStage. handleAsync(BiFunction<? super T,Throwable,? extends U> fn,
           Executor executor)Returns a new CompletionStage that, when this stage completes
 either normally or exceptionally, is executed using the
 supplied executor, with this stage's result and exception as
 arguments to the supplied function. | 
| default V | ConcurrentMap. merge(K key,
     V value,
     BiFunction<? super V,? super V,? extends V> remappingFunction)If the specified key is not already associated with a value or is
 associated with null, associates it with the given non-null value. | 
| V | ConcurrentSkipListMap. merge(K key,
     V value,
     BiFunction<? super V,? super V,? extends V> remappingFunction)If the specified key is not already associated with a value,
 associates it with the given value. | 
| V | ConcurrentHashMap. merge(K key,
     V value,
     BiFunction<? super V,? super V,? extends V> remappingFunction)If the specified key is not already associated with a
 (non-null) value, associates it with the given value. | 
| <U> U | ConcurrentHashMap. reduce(long parallelismThreshold,
      BiFunction<? super K,? super V,? extends U> transformer,
      BiFunction<? super U,? super U,? extends U> reducer)Returns the result of accumulating the given transformation
 of all (key, value) pairs using the given reducer to
 combine values, or null if none. | 
| <U> U | ConcurrentHashMap. reduce(long parallelismThreshold,
      BiFunction<? super K,? super V,? extends U> transformer,
      BiFunction<? super U,? super U,? extends U> reducer)Returns the result of accumulating the given transformation
 of all (key, value) pairs using the given reducer to
 combine values, or null if none. | 
| Map.Entry<K,V> | ConcurrentHashMap. reduceEntries(long parallelismThreshold,
             BiFunction<Map.Entry<K,V>,Map.Entry<K,V>,? extends Map.Entry<K,V>> reducer)Returns the result of accumulating all entries using the
 given reducer to combine values, or null if none. | 
| <U> U | ConcurrentHashMap. reduceEntries(long parallelismThreshold,
             Function<Map.Entry<K,V>,? extends U> transformer,
             BiFunction<? super U,? super U,? extends U> reducer)Returns the result of accumulating the given transformation
 of all entries using the given reducer to combine values,
 or null if none. | 
| K | ConcurrentHashMap. reduceKeys(long parallelismThreshold,
          BiFunction<? super K,? super K,? extends K> reducer)Returns the result of accumulating all keys using the given
 reducer to combine values, or null if none. | 
| <U> U | ConcurrentHashMap. reduceKeys(long parallelismThreshold,
          Function<? super K,? extends U> transformer,
          BiFunction<? super U,? super U,? extends U> reducer)Returns the result of accumulating the given transformation
 of all keys using the given reducer to combine values, or
 null if none. | 
| V | ConcurrentHashMap. reduceValues(long parallelismThreshold,
            BiFunction<? super V,? super V,? extends V> reducer)Returns the result of accumulating all values using the
 given reducer to combine values, or null if none. | 
| <U> U | ConcurrentHashMap. reduceValues(long parallelismThreshold,
            Function<? super V,? extends U> transformer,
            BiFunction<? super U,? super U,? extends U> reducer)Returns the result of accumulating the given transformation
 of all values using the given reducer to combine values, or
 null if none. | 
| default void | ConcurrentMap. replaceAll(BiFunction<? super K,? super V,? extends V> function)Replaces each entry's value with the result of invoking the given
 function on that entry until all entries have been processed or the
 function throws an exception. | 
| void | ConcurrentSkipListMap. replaceAll(BiFunction<? super K,? super V,? extends V> function) | 
| void | ConcurrentHashMap. replaceAll(BiFunction<? super K,? super V,? extends V> function) | 
| <U> U | ConcurrentHashMap. search(long parallelismThreshold,
      BiFunction<? super K,? super V,? extends U> searchFunction)Returns a non-null result from applying the given search
 function on each (key, value), or null if none. | 
| <U,V> CompletableFuture<V> | CompletableFuture. thenCombine(CompletionStage<? extends U> other,
           BiFunction<? super T,? super U,? extends V> fn) | 
| <U,V> CompletionStage<V> | CompletionStage. thenCombine(CompletionStage<? extends U> other,
           BiFunction<? super T,? super U,? extends V> fn)Returns a new CompletionStage that, when this and the other
 given stage both complete normally, is executed with the two
 results as arguments to the supplied function. | 
| <U,V> CompletableFuture<V> | CompletableFuture. thenCombineAsync(CompletionStage<? extends U> other,
                BiFunction<? super T,? super U,? extends V> fn) | 
| <U,V> CompletionStage<V> | CompletionStage. thenCombineAsync(CompletionStage<? extends U> other,
                BiFunction<? super T,? super U,? extends V> fn)Returns a new CompletionStage that, when this and the other
 given stage complete normally, is executed using this stage's
 default asynchronous execution facility, with the two results
 as arguments to the supplied function. | 
| <U,V> CompletableFuture<V> | CompletableFuture. thenCombineAsync(CompletionStage<? extends U> other,
                BiFunction<? super T,? super U,? extends V> fn,
                Executor executor) | 
| <U,V> CompletionStage<V> | CompletionStage. thenCombineAsync(CompletionStage<? extends U> other,
                BiFunction<? super T,? super U,? extends V> fn,
                Executor executor)Returns a new CompletionStage that, when this and the other
 given stage complete normally, is executed using the supplied
 executor, with the two results as arguments to the supplied
 function. | 
| Modifier and Type | Interface and Description | 
|---|---|
| interface  | BinaryOperator<T>Represents an operation upon two operands of the same type, producing a result
 of the same type as the operands. | 
| Modifier and Type | Method and Description | 
|---|---|
| default <V> BiFunction<T,U,V> | BiFunction. andThen(Function<? super R,? extends V> after)Returns a composed function that first applies this function to
 its input, and then applies the  afterfunction to the result. | 
| Modifier and Type | Method and Description | 
|---|---|
| <U> U | Stream. reduce(U identity,
      BiFunction<U,? super T,U> accumulator,
      BinaryOperator<U> combiner)Performs a reduction on the
 elements of this stream, using the provided identity, accumulation and
 combining functions. | 
 Submit a bug or feature 
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.
 Copyright © 1993, 2015, Oracle and/or its affiliates.  All rights reserved.