Scala Library: scala.collection.JavaConverters
scala.collection.JavaConverters
A collection of decorators that allow converting between Scala and Java
collections using asScala
and asJava
methods.
The following conversions are supported via asJava
, asScala
scala.collection.Iterable
<=>java.lang.Iterable
scala.collection.Iterator
<=>java.util.Iterator
scala.collection.mutable.Buffer
<=>java.util.List
scala.collection.mutable.Set
<=>java.util.Set
scala.collection.mutable.Map
<=>java.util.Map
scala.collection.mutable.concurrent.Map
<=>java.util.concurrent.ConcurrentMap
In all cases, converting from a source type to a target type and back again will return the original source object, e.g.
The following conversions are also supported, but the direction from Scala to
Java is done by the more specifically named methods: asJavaCollection
,
asJavaEnumeration
, asJavaDictionary
.
scala.collection.Iterable
<=>java.util.Collection
scala.collection.Iterator
<=>java.util.Enumeration
scala.collection.mutable.Map
<=>java.util.Dictionary
In addition, the following one way conversions are provided via asJava
:
scala.collection.Seq
=>java.util.List
scala.collection.mutable.Seq
=>java.util.List
scala.collection.Set
=>java.util.Set
scala.collection.Map
=>java.util.Map
The following one way conversion is provided via asScala
:
-
java.util.Properties
=>scala.collection.mutable.Map
- Source
- Since
- 2.8.1
Value Members From scala.collection.convert.DecorateAsJava
implicit def asJavaCollectionConverter[A](i: Iterable[A]): convert.Decorators.AsJavaCollection[A]
Adds an asJavaCollection
method that implicitly converts a Scala Iterable
to
an immutable Java Collection
.
If the Scala Iterable
was previously obtained from an implicit or explicit
call of asSizedIterable(java.util.Collection)
then the original Java
Collection
will be returned.
- i
- The
SizedIterable
to be converted.
- The
- returns
- An object with an
asJava
method that returns a JavaCollection
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def asJavaDictionaryConverter[A, B](m: mutable.Map[A, B]): convert.Decorators.AsJavaDictionary[A, B]
Adds an asJavaDictionary
method that implicitly converts a Scala mutable
Map
to a Java Dictionary
.
The returned Java Dictionary
is backed by the provided Scala Dictionary
and
any side-effects of using it via the Java interface will be visible via the
Scala interface and vice versa.
If the Scala Dictionary
was previously obtained from an implicit or explicit
call of asMap(java.util.Dictionary)
then the original Java Dictionary
will
be returned.
- m
- The
Map
to be converted.
- The
- returns
- An object with an
asJavaDictionary
method that returns a JavaDictionary
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def asJavaEnumerationConverter[A](i: Iterator[A]): convert.Decorators.AsJavaEnumeration[A]
Adds an asJavaEnumeration
method that implicitly converts a Scala Iterator
to a Java Enumeration
. The returned Java Enumeration
is backed by the
provided Scala Iterator
and any side-effects of using it via the Java
interface will be visible via the Scala interface and vice versa.
If the Scala Iterator
was previously obtained from an implicit or explicit
call of asIterator(java.util.Enumeration)
then the original Java
Enumeration
will be returned.
- i
- The
Iterator
to be converted.
- The
- returns
- An object with an
asJavaEnumeration
method that returns a JavaEnumeration
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def asJavaIterableConverter[A](i: Iterable[A]): convert.Decorators.AsJava[java.lang.Iterable[A]]
Adds an asJava
method that implicitly converts a Scala Iterable
to a Java
Iterable
.
The returned Java Iterable
is backed by the provided Scala Iterable
and any
side-effects of using it via the Java interface will be visible via the Scala
interface and vice versa.
If the Scala Iterable
was previously obtained from an implicit or explicit
call of asIterable(java.lang.Iterable)
then the original Java Iterable
will
be returned.
- i
- The
Iterable
to be converted.
- The
- returns
- An object with an
asJavaCollection
method that returns a JavaIterable
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def asJavaIteratorConverter[A](i: Iterator[A]): convert.Decorators.AsJava[java.util.Iterator[A]]
Adds an asJava
method that implicitly converts a Scala Iterator
to a Java
Iterator
. The returned Java Iterator
is backed by the provided Scala
Iterator
and any side-effects of using it via the Java interface will be
visible via the Scala interface and vice versa.
If the Scala Iterator
was previously obtained from an implicit or explicit
call of asIterator(java.util.Iterator)
then the original Java Iterator
will
be returned by the asJava
method.
- i
- The
Iterator
to be converted.
- The
- returns
- An object with an
asJava
method that returns a JavaIterator
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def bufferAsJavaListConverter[A](b: Buffer[A]): convert.Decorators.AsJava[java.util.List[A]]
Adds an asJava
method that implicitly converts a Scala mutable Buffer
to a
Java List
.
The returned Java List
is backed by the provided Scala Buffer
and any
side-effects of using it via the Java interface will be visible via the Scala
interface and vice versa.
If the Scala Buffer
was previously obtained from an implicit or explicit call
of asBuffer(java.util.List)
then the original Java List
will be returned.
- b
- The
Buffer
to be converted.
- The
- returns
- An object with an
asJava
method that returns a JavaList
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def mapAsJavaConcurrentMapConverter[A, B](m: concurrent.Map[A, B]): convert.Decorators.AsJava[ConcurrentMap[A, B]]
Adds an asJava
method that implicitly converts a Scala mutable
concurrent.Map
to a Java ConcurrentMap
.
The returned Java ConcurrentMap
is backed by the provided Scala
concurrent.Map
and any side-effects of using it via the Java interface will
be visible via the Scala interface and vice versa.
If the Scala concurrent.Map
was previously obtained from an implicit or
explicit call of asConcurrentMap(java.util.concurrent.ConcurrentMap)
then the
original Java ConcurrentMap
will be returned.
- m
- The Scala
concurrent.Map
to be converted.
- The Scala
- returns
- An object with an
asJava
method that returns a JavaConcurrentMap
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def mapAsJavaMapConverter[A, B](m: Map[A, B]): convert.Decorators.AsJava[java.util.Map[A, B]]
Adds an asJava
method that implicitly converts a Scala Map
to a Java Map
.
The returned Java Map
is backed by the provided Scala Map
and any
side-effects of using it via the Java interface will be visible via the Scala
interface and vice versa.
If the Scala Map
was previously obtained from an implicit or explicit call of
asMap(java.util.Map)
then the original Java Map
will be returned.
- m
- The
Map
to be converted.
- The
- returns
- An object with an
asJava
method that returns a JavaMap
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def mutableMapAsJavaMapConverter[A, B](m: mutable.Map[A, B]): convert.Decorators.AsJava[java.util.Map[A, B]]
Adds an asJava
method that implicitly converts a Scala mutable Map
to a Java
Map
.
The returned Java Map
is backed by the provided Scala Map
and any
side-effects of using it via the Java interface will be visible via the Scala
interface and vice versa.
If the Scala Map
was previously obtained from an implicit or explicit call of
asMap(java.util.Map)
then the original Java Map
will be returned.
- m
- The
Map
to be converted.
- The
- returns
- An object with an
asJava
method that returns a JavaMap
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def mutableSeqAsJavaListConverter[A](b: mutable.Seq[A]): convert.Decorators.AsJava[java.util.List[A]]
Adds an asJava
method that implicitly converts a Scala mutable Seq
to a Java
List
.
The returned Java List
is backed by the provided Scala Seq
and any
side-effects of using it via the Java interface will be visible via the Scala
interface and vice versa.
If the Scala Seq
was previously obtained from an implicit or explicit call of
asSeq(java.util.List)
then the original Java List
will be returned.
- b
- The
Seq
to be converted.
- The
- returns
- An object with an
asJava
method that returns a JavaList
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def mutableSetAsJavaSetConverter[A](s: mutable.Set[A]): convert.Decorators.AsJava[java.util.Set[A]]
Adds an asJava
method that implicitly converts a Scala mutable Set
> to a
Java Set
.
The returned Java Set
is backed by the provided Scala Set
and any
side-effects of using it via the Java interface will be visible via the Scala
interface and vice versa.
If the Scala Set
was previously obtained from an implicit or explicit call of
asSet(java.util.Set)
then the original Java Set
will be returned.
- s
- The
Set
to be converted.
- The
- returns
- An object with an
asJava
method that returns a JavaSet
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def seqAsJavaListConverter[A](b: Seq[A]): convert.Decorators.AsJava[java.util.List[A]]
Adds an asJava
method that implicitly converts a Scala Seq
to a Java List
.
The returned Java List
is backed by the provided Scala Seq
and any
side-effects of using it via the Java interface will be visible via the Scala
interface and vice versa.
If the Scala Seq
was previously obtained from an implicit or explicit call of
asSeq(java.util.List)
then the original Java List
will be returned.
- b
- The
Seq
to be converted.
- The
- returns
- An object with an
asJava
method that returns a JavaList
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
implicit def setAsJavaSetConverter[A](s: Set[A]): convert.Decorators.AsJava[java.util.Set[A]]
Adds an asJava
method that implicitly converts a Scala Set
to a Java Set
.
The returned Java Set
is backed by the provided Scala Set
and any
side-effects of using it via the Java interface will be visible via the Scala
interface and vice versa.
If the Scala Set
was previously obtained from an implicit or explicit call of
asSet(java.util.Set)
then the original Java Set
will be returned.
- s
- The
Set
to be converted.
- The
- returns
- An object with an
asJava
method that returns a JavaSet
view of the argument.
- An object with an
- Definition Classes
- DecorateAsJava
(defined at scala.collection.convert.DecorateAsJava)
Value Members From scala.collection.convert.DecorateAsScala
implicit def asScalaBufferConverter[A](l: java.util.List[A]): convert.Decorators.AsScala[Buffer[A]]
Adds an asScala
method that implicitly converts a Java List
to a Scala
mutable Buffer
.
The returned Scala Buffer
is backed by the provided Java List
and any
side-effects of using it via the Scala interface will be visible via the Java
interface and vice versa.
If the Java List
was previously obtained from an implicit or explicit call of
asList(scala.collection.mutable.Buffer)
then the original Scala Buffer
will
be returned.
- l
- The
List
to be converted.
- The
- returns
- An object with an
asScala
method that returns a Scala mutableBuffer
view of the argument.
- An object with an
- Definition Classes
- DecorateAsScala
(defined at scala.collection.convert.DecorateAsScala)
implicit def asScalaIteratorConverter[A](i: java.util.Iterator[A]): convert.Decorators.AsScala[Iterator[A]]
Adds an asScala
method that implicitly converts a Java Iterator
to a Scala
Iterator
.
The returned Scala Iterator
is backed by the provided Java Iterator
and any
side-effects of using it via the Scala interface will be visible via the Java
interface and vice versa.
If the Java Iterator
was previously obtained from an implicit or explicit call
of asIterator(scala.collection.Iterator)
then the original Scala Iterator
will be returned.
- i
- The
Iterator
to be converted.
- The
- returns
- An object with an
asScala
method that returns a ScalaIterator
view of the argument.
- An object with an
- Definition Classes
- DecorateAsScala
(defined at scala.collection.convert.DecorateAsScala)
implicit def asScalaSetConverter[A](s: java.util.Set[A]): convert.Decorators.AsScala[mutable.Set[A]]
Adds an asScala
method that implicitly converts a Java Set
to a Scala
mutable Set
.
The returned Scala Set
is backed by the provided Java Set
and any
side-effects of using it via the Scala interface will be visible via the Java
interface and vice versa.
If the Java Set
was previously obtained from an implicit or explicit call of
asSet(scala.collection.mutable.Set)
then the original Scala Set
will be
returned.
- s
- The
Set
to be converted.
- The
- returns
- An object with an
asScala
method that returns a Scala mutableSet
view of the argument.
- An object with an
- Definition Classes
- DecorateAsScala
(defined at scala.collection.convert.DecorateAsScala)
implicit def collectionAsScalaIterableConverter[A](i: Collection[A]): convert.Decorators.AsScala[Iterable[A]]
Adds an asScala
method that implicitly converts a Java Collection
to an
Scala Iterable
.
If the Java Collection
was previously obtained from an implicit or explicit
call of asCollection(scala.collection.SizedIterable)
then the original Scala
SizedIterable
will be returned.
- i
- The
Collection
to be converted.
- The
- returns
- An object with an
asScala
method that returns a ScalaSizedIterable
view of the argument.
- An object with an
- Definition Classes
- DecorateAsScala
(defined at scala.collection.convert.DecorateAsScala)
implicit def dictionaryAsScalaMapConverter[A, B](p: Dictionary[A, B]): convert.Decorators.AsScala[mutable.Map[A, B]]
Adds an asScala
method that implicitly converts a Java Dictionary
to a Scala
mutable Map[String, String]
. The returned Scala Map[String, String]
is
backed by the provided Java Dictionary
and any side-effects of using it via
the Scala interface will be visible via the Java interface and vice versa.
- p
- The
Dictionary
to be converted.
- The
- returns
- An object with an
asScala
method that returns a Scala mutableMap[String, String]
view of the argument.
- An object with an
- Definition Classes
- DecorateAsScala
(defined at scala.collection.convert.DecorateAsScala)
implicit def enumerationAsScalaIteratorConverter[A](i: java.util.Enumeration[A]): convert.Decorators.AsScala[Iterator[A]]
Adds an asScala
method that implicitly converts a Java Enumeration
to a
Scala Iterator
.
The returned Scala Iterator
is backed by the provided Java Enumeration
and
any side-effects of using it via the Scala interface will be visible via the
Java interface and vice versa.
If the Java Enumeration
was previously obtained from an implicit or explicit
call of asEnumeration(scala.collection.Iterator)
then the original Scala
Iterator
will be returned.
- i
- The
Enumeration
to be converted.
- The
- returns
- An object with an
asScala
method that returns a ScalaIterator
view of the argument.
- An object with an
- Definition Classes
- DecorateAsScala
(defined at scala.collection.convert.DecorateAsScala)
implicit def iterableAsScalaIterableConverter[A](i: java.lang.Iterable[A]): convert.Decorators.AsScala[Iterable[A]]
Adds an asScala
method that implicitly converts a Java Iterable
to a Scala
Iterable
.
The returned Scala Iterable
is backed by the provided Java Iterable
and any
side-effects of using it via the Scala interface will be visible via the Java
interface and vice versa.
If the Java Iterable
was previously obtained from an implicit or explicit call
of asIterable(scala.collection.Iterable)
then the original Scala Iterable
will be returned.
- i
- The
Iterable
to be converted.
- The
- returns
- An object with an
asScala
method that returns a ScalaIterable
view of the argument.
- An object with an
- Definition Classes
- DecorateAsScala
(defined at scala.collection.convert.DecorateAsScala)
implicit def mapAsScalaConcurrentMapConverter[A, B](m: ConcurrentMap[A, B]): convert.Decorators.AsScala[concurrent.Map[A, B]]
Adds an asScala
method that implicitly converts a Java ConcurrentMap
to a
Scala mutable concurrent.Map
. The returned Scala concurrent.Map
is backed
by the provided Java ConcurrentMap
and any side-effects of using it via the
Scala interface will be visible via the Java interface and vice versa.
If the Java ConcurrentMap
was previously obtained from an implicit or explicit
call of mapAsScalaConcurrentMap(scala.collection.mutable.ConcurrentMap)
then
the original Scala concurrent.Map
will be returned.
- m
- The
ConcurrentMap
to be converted.
- The
- returns
- An object with an
asScala
method that returns a Scala mutableconcurrent.Map
view of the argument.
- An object with an
- Definition Classes
- DecorateAsScala
(defined at scala.collection.convert.DecorateAsScala)
implicit def mapAsScalaMapConverter[A, B](m: java.util.Map[A, B]): convert.Decorators.AsScala[mutable.Map[A, B]]
Adds an asScala
method that implicitly converts a Java Map
to a Scala
mutable Map
. The returned Scala Map
is backed by the provided Java Map
and any side-effects of using it via the Scala interface will be visible via the
Java interface and vice versa.
If the Java Map
was previously obtained from an implicit or explicit call of
asMap(scala.collection.mutable.Map)
then the original Scala Map
will be
returned.
If the wrapped map is synchronized (e.g. from
java.util.Collections.synchronizedMap
), it is your responsibility to wrap
all non-atomic operations with underlying.synchronized
. This includes get
,
as java.util.Map
‘s API does not allow for an atomic get
when null
values
may be present.
- m
- The
Map
to be converted.
- The
- returns
- An object with an
asScala
method that returns a Scala mutableMap
view of the argument.
- An object with an
- Definition Classes
- DecorateAsScala
(defined at scala.collection.convert.DecorateAsScala)
implicit def propertiesAsScalaMapConverter(p: Properties): convert.Decorators.AsScala[mutable.Map[String, String]]
Adds an asScala
method that implicitly converts a Java Properties
to a Scala
mutable Map[String, String]
. The returned Scala Map[String, String]
is
backed by the provided Java Properties
and any side-effects of using it via
the Scala interface will be visible via the Java interface and vice versa.
- p
- The
Properties
to be converted.
- The
- returns
- An object with an
asScala
method that returns a Scala mutableMap[String, String]
view of the argument.
- An object with an
- Definition Classes
- DecorateAsScala (defined at scala.collection.convert.DecorateAsScala)
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