object JavaConverters extends AsJavaConverters with AsScalaConverters
A variety of decorators that enable converting between
Scala and Java collections using extension methods, asScala and asJava.
The extension methods return adapters for the corresponding API.
The following conversions are supported via asScala and asJava:
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.concurrent.Map <=> java.util.concurrent.ConcurrentMap
The following conversions are supported via asScala and through
specially-named extension methods to convert to Java collections, as shown:
scala.collection.Iterable <=> java.util.Collection (via asJavaCollection) scala.collection.Iterator <=> java.util.Enumeration (via asJavaEnumeration) scala.collection.mutable.Map <=> java.util.Dictionary (via asJavaDictionary)
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
In all cases, converting from a source type to a target type and back again will return the original source object. For example:
import scala.collection.JavaConverters._ val source = new scala.collection.mutable.ListBuffer[Int] val target: java.util.List[Int] = source.asJava val other: scala.collection.mutable.Buffer[Int] = target.asScala assert(source eq other)
Alternatively, the conversion methods have descriptive names and can be invoked explicitly.
scala> val vs = java.util.Arrays.asList("hi", "bye") vs: java.util.List[String] = [hi, bye] scala> val ss = asScalaIterator(vs.iterator) ss: Iterator[String] = <iterator> scala> .toList res0: List[String] = List(hi, bye) scala> val ss = asScalaBuffer(vs) ss: scala.collection.mutable.Buffer[String] = Buffer(hi, bye)
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
scala.jdk.CollectionConvertersinstead- Source
- JavaConverters.scala
- Alphabetic
- By Inheritance
- JavaConverters
- AsScalaConverters
- AsJavaConverters
- AnyRef
- Any
- Hide All
- Show All
- Public
- Protected
Type Members
- class AsJava[A] extends AnyRef
Generic class containing the
asJavaconverter method - class AsJavaCollection[A] extends AnyRef
Generic class containing the
asJavaCollectionconverter method - class AsJavaDictionary[K, V] extends AnyRef
Generic class containing the
asJavaDictionaryconverter method - class AsJavaEnumeration[A] extends AnyRef
Generic class containing the
asJavaEnumerationconverter method - class AsScala[A] extends AnyRef
Generic class containing the
asScalaconverter method
Value Members
- final def !=(arg0: Any): Boolean
Test two objects for inequality.
Test two objects for inequality.
- returns
trueif !(this == that), false otherwise.
- Definition Classes
- AnyRef → Any
- final def ##: Int
Equivalent to
x.hashCodeexcept for boxed numeric types andnull.Equivalent to
x.hashCodeexcept for boxed numeric types andnull. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. Fornullreturns a hashcode wherenull.hashCodethrows aNullPointerException.- returns
a hash value consistent with ==
- Definition Classes
- AnyRef → Any
- final def ==(arg0: Any): Boolean
The expression
x == thatis equivalent toif (x eq null) that eq null else x.equals(that).The expression
x == thatis equivalent toif (x eq null) that eq null else x.equals(that).- returns
trueif the receiver object is equivalent to the argument;falseotherwise.
- Definition Classes
- AnyRef → Any
- final def asInstanceOf[T0]: T0
Cast the receiver object to be of type
T0.Cast the receiver object to be of type
T0.Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression
1.asInstanceOf[String]will throw aClassCastExceptionat runtime, while the expressionList(1).asInstanceOf[List[String]]will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.- returns
the receiver object.
- Definition Classes
- Any
- Exceptions thrown
ClassCastExceptionif the receiver object is not an instance of the erasure of typeT0.
- def asJava[K, V](m: concurrent.Map[K, V]): ConcurrentMap[K, V]
Converts a Scala mutable
concurrent.Mapto a JavaConcurrentMap.Converts a Scala mutable
concurrent.Mapto a JavaConcurrentMap.The returned Java
ConcurrentMapis backed by the provided Scalaconcurrent.Mapand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
concurrent.Mapwas previously obtained from an implicit or explicit call ofasScalathen the original JavaConcurrentMapwill be returned.- m
The Scala
concurrent.Mapto be converted.- returns
A Java
ConcurrentMapview of the argument.
- Definition Classes
- AsJavaConverters
- def asJava[K, V](m: Map[K, V]): java.util.Map[K, V]
Converts a Scala
Mapto a JavaMap.Converts a Scala
Mapto a JavaMap.The returned Java
Mapis backed by the provided ScalaMapand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Mapwas previously obtained from an implicit or explicit call ofasScalathen the original JavaMapwill be returned.- m
The Scala
Mapto be converted.- returns
A Java
Mapview of the argument.
- Definition Classes
- AsJavaConverters
- def asJava[K, V](m: mutable.Map[K, V]): java.util.Map[K, V]
Converts a Scala mutable
Mapto a JavaMap.Converts a Scala mutable
Mapto a JavaMap.The returned Java
Mapis backed by the provided ScalaMapand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Mapwas previously obtained from an implicit or explicit call ofasScalathen the original JavaMapwill be returned.- m
The Scala mutable
Mapto be converted.- returns
A Java
Mapview of the argument.
- Definition Classes
- AsJavaConverters
- def asJava[A](s: Set[A]): java.util.Set[A]
Converts a Scala
Setto a JavaSet.Converts a Scala
Setto a JavaSet.The returned Java
Setis backed by the provided ScalaSetand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Setwas previously obtained from an implicit or explicit call ofasScalathen the original JavaSetwill be returned.- s
The Scala
Setto be converted.- returns
A Java
Setview of the argument.
- Definition Classes
- AsJavaConverters
- def asJava[A](s: mutable.Set[A]): java.util.Set[A]
Converts a Scala mutable
Setto a JavaSet.Converts a Scala mutable
Setto a JavaSet.The returned Java
Setis backed by the provided ScalaSetand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Setwas previously obtained from an implicit or explicit call ofasScalathen the original JavaSetwill be returned.- s
The Scala mutable
Setto be converted.- returns
A Java
Setview of the argument.
- Definition Classes
- AsJavaConverters
- def asJava[A](s: Seq[A]): java.util.List[A]
Converts a Scala
Seqto a JavaList.Converts a Scala
Seqto a JavaList.The returned Java
Listis backed by the provided ScalaSeqand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Seqwas previously obtained from an implicit or explicit call ofasScalathen the original JavaListwill be returned.- s
The Scala
Seqto be converted.- returns
A Java
Listview of the argument.
- Definition Classes
- AsJavaConverters
- def asJava[A](s: mutable.Seq[A]): java.util.List[A]
Converts a Scala mutable
Seqto a JavaList.Converts a Scala mutable
Seqto a JavaList.The returned Java
Listis backed by the provided ScalaSeqand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Seqwas previously obtained from an implicit or explicit call ofasScalathen the original JavaListwill be returned.- s
The Scala
Seqto be converted.- returns
A Java
Listview of the argument.
- Definition Classes
- AsJavaConverters
- def asJava[A](b: Buffer[A]): java.util.List[A]
Converts a Scala mutable
Bufferto a Java List.Converts a Scala mutable
Bufferto a Java List.The returned Java List is backed by the provided Scala
Bufferand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Bufferwas previously obtained from an implicit or explicit call ofasScalathen the original JavaListwill be returned.- b
The Scala
Bufferto be converted.- returns
A Java
Listview of the argument.
- Definition Classes
- AsJavaConverters
- def asJava[A](i: Iterable[A]): java.lang.Iterable[A]
Converts a Scala
Iterableto a JavaIterable.Converts a Scala
Iterableto a JavaIterable.The returned Java
Iterableis backed by the provided ScalaIterableand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Iterablewas previously obtained from an implicit or explicit call ofasScalathen the original JavaIterablewill be returned.- i
The Scala
Iterableto be converted.- returns
A Java
Iterableview of the argument.
- Definition Classes
- AsJavaConverters
- def asJava[A](i: Iterator[A]): java.util.Iterator[A]
Converts a Scala
Iteratorto a JavaIterator.Converts a Scala
Iteratorto a JavaIterator.The returned Java
Iteratoris backed by the provided ScalaIteratorand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Iteratorwas previously obtained from an implicit or explicit call ofasScalathen the original JavaIteratorwill be returned.- i
The Scala
Iteratorto be converted.- returns
A Java
Iteratorview of the argument.
- Definition Classes
- AsJavaConverters
- def asJavaCollection[A](i: Iterable[A]): Collection[A]
Converts a Scala
Iterableto an immutable JavaCollection.Converts a Scala
Iterableto an immutable JavaCollection.If the Scala
Iterablewas previously obtained from an implicit or explicit call ofasScalathen the original JavaCollectionwill be returned.- i
The Scala
Iterableto be converted.- returns
A Java
Collectionview of the argument.
- Definition Classes
- AsJavaConverters
- implicit def asJavaCollectionConverter[A](i: Iterable[A]): AsJavaCollection[A]
Adds an
asJavaCollectionmethod that implicitly converts a ScalaIterableto an immutable JavaCollection.Adds an
asJavaCollectionmethod that implicitly converts a ScalaIterableto an immutable JavaCollection.- See also
- def asJavaDictionary[K, V](m: mutable.Map[K, V]): Dictionary[K, V]
Converts a Scala mutable
Mapto a JavaDictionary.Converts a Scala mutable
Mapto a JavaDictionary.The returned Java
Dictionaryis backed by the provided ScalaDictionaryand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Mapwas previously obtained from an implicit or explicit call ofasScalathen the original JavaDictionarywill be returned.- m
The Scala
Mapto be converted.- returns
A Java
Dictionaryview of the argument.
- Definition Classes
- AsJavaConverters
- implicit def asJavaDictionaryConverter[K, V](m: mutable.Map[K, V]): AsJavaDictionary[K, V]
Adds an
asJavaDictionarymethod that implicitly converts a Scala mutableMapto a JavaDictionary.Adds an
asJavaDictionarymethod that implicitly converts a Scala mutableMapto a JavaDictionary.- See also
- def asJavaEnumeration[A](i: Iterator[A]): java.util.Enumeration[A]
Converts a Scala
Iteratorto a JavaEnumeration.Converts a Scala
Iteratorto a JavaEnumeration.The returned Java
Enumerationis backed by the provided ScalaIteratorand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Iteratorwas previously obtained from an implicit or explicit call ofasScalathen the original JavaEnumerationwill be returned.- i
The Scala
Iteratorto be converted.- returns
A Java
Enumerationview of the argument.
- Definition Classes
- AsJavaConverters
- implicit def asJavaEnumerationConverter[A](i: Iterator[A]): AsJavaEnumeration[A]
Adds an
asJavaEnumerationmethod that implicitly converts a ScalaIteratorto a JavaEnumeration.Adds an
asJavaEnumerationmethod that implicitly converts a ScalaIteratorto a JavaEnumeration.- See also
- implicit def asJavaIterableConverter[A](i: Iterable[A]): AsJava[java.lang.Iterable[A]]
Adds an
asJavamethod that implicitly converts a ScalaIterableto a JavaIterable.Adds an
asJavamethod that implicitly converts a ScalaIterableto a JavaIterable.- See also
- implicit def asJavaIteratorConverter[A](i: Iterator[A]): AsJava[java.util.Iterator[A]]
Adds an
asJavamethod that implicitly converts a ScalaIteratorto a JavaIterator.Adds an
asJavamethod that implicitly converts a ScalaIteratorto a JavaIterator.- See also
- def asScala(p: Properties): mutable.Map[String, String]
Converts a Java
Propertiesto a Scala mutableMap[String, String].Converts a Java
Propertiesto a Scala mutableMap[String, String].The returned Scala
Map[String, String]is backed by the provided JavaPropertiesand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.- p
The Java
Propertiesto be converted.- returns
A Scala mutable
Map[String, String]view of the argument.
- Definition Classes
- AsScalaConverters
- def asScala[A, B](d: Dictionary[A, B]): mutable.Map[A, B]
Converts a Java
Dictionaryto a Scala mutableMap.Converts a Java
Dictionaryto a Scala mutableMap.The returned Scala
Mapis backed by the provided JavaDictionaryand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Dictionarywas previously obtained from an implicit or explicit call ofasJavaDictionarythen the original ScalaMapwill be returned.- d
The Java
Dictionaryto be converted.- returns
A Scala mutable
Mapview of the argument.
- Definition Classes
- AsScalaConverters
- def asScala[A, B](m: ConcurrentMap[A, B]): concurrent.Map[A, B]
Converts a Java
ConcurrentMapto a Scala mutableConcurrentMap.Converts a Java
ConcurrentMapto a Scala mutableConcurrentMap.The returned Scala
ConcurrentMapis backed by the provided JavaConcurrentMapand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
ConcurrentMapwas previously obtained from an implicit or explicit call ofasJavathen the original ScalaConcurrentMapwill be returned.- m
The Java
ConcurrentMapto be converted.- returns
A Scala mutable
ConcurrentMapview of the argument.
- Definition Classes
- AsScalaConverters
- def asScala[A, B](m: java.util.Map[A, B]): mutable.Map[A, B]
Converts a Java
Mapto a Scala mutableMap.Converts a Java
Mapto a Scala mutableMap.The returned Scala
Mapis backed by the provided JavaMapand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Mapwas previously obtained from an implicit or explicit call ofasJavathen the original ScalaMapwill 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 withunderlying.synchronized. This includesget, asjava.util.Map's API does not allow for an atomicgetwhennullvalues may be present.- m
The Java
Mapto be converted.- returns
A Scala mutable
Mapview of the argument.
- Definition Classes
- AsScalaConverters
- def asScala[A](s: java.util.Set[A]): mutable.Set[A]
Converts a Java
Setto a Scala mutableSet.Converts a Java
Setto a Scala mutableSet.The returned Scala
Setis backed by the provided JavaSetand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Setwas previously obtained from an implicit or explicit call ofasJavathen the original ScalaSetwill be returned.- s
The Java
Setto be converted.- returns
A Scala mutable
Setview of the argument.
- Definition Classes
- AsScalaConverters
- def asScala[A](l: java.util.List[A]): Buffer[A]
Converts a Java
Listto a Scala mutableBuffer.Converts a Java
Listto a Scala mutableBuffer.The returned Scala
Bufferis backed by the provided JavaListand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Listwas previously obtained from an implicit or explicit call ofasJavathen the original ScalaBufferwill be returned.- l
The Java
Listto be converted.- returns
A Scala mutable
Bufferview of the argument.
- Definition Classes
- AsScalaConverters
- def asScala[A](c: Collection[A]): Iterable[A]
Converts a Java
Collectionto a ScalaIterable.Converts a Java
Collectionto a ScalaIterable.If the Java
Collectionwas previously obtained from an implicit or explicit call ofasJavaCollectionthen the original ScalaIterablewill be returned.- c
The Java
Collectionto be converted.- returns
A Scala
Iterableview of the argument.
- Definition Classes
- AsScalaConverters
- def asScala[A](i: java.lang.Iterable[A]): Iterable[A]
Converts a Java
Iterableto a ScalaIterable.Converts a Java
Iterableto a ScalaIterable.The returned Scala
Iterableis backed by the provided JavaIterableand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Iterablewas previously obtained from an implicit or explicit call ofasJavathen the original ScalaIterablewill be returned.- i
The Java
Iterableto be converted.- returns
A Scala
Iterableview of the argument.
- Definition Classes
- AsScalaConverters
- def asScala[A](e: java.util.Enumeration[A]): Iterator[A]
Converts a Java
Enumerationto a ScalaIterator.Converts a Java
Enumerationto a ScalaIterator.The returned Scala
Iteratoris backed by the provided JavaEnumerationand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Enumerationwas previously obtained from an implicit or explicit call ofasJavaEnumerationthen the original ScalaIteratorwill be returned.- e
The Java
Enumerationto be converted.- returns
A Scala
Iteratorview of the argument.
- Definition Classes
- AsScalaConverters
- def asScala[A](i: java.util.Iterator[A]): Iterator[A]
Converts a Java
Iteratorto a ScalaIterator.Converts a Java
Iteratorto a ScalaIterator.The returned Scala
Iteratoris backed by the provided JavaIteratorand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Iteratorwas previously obtained from an implicit or explicit call ofasJavathen the original ScalaIteratorwill be returned.- i
The Java
Iteratorto be converted.- returns
A Scala
Iteratorview of the argument.
- Definition Classes
- AsScalaConverters
- implicit def asScalaBufferConverter[A](l: java.util.List[A]): AsScala[Buffer[A]]
Adds an
asScalamethod that implicitly converts a JavaListto a Scala mutableBuffer.Adds an
asScalamethod that implicitly converts a JavaListto a Scala mutableBuffer.- See also
- implicit def asScalaIteratorConverter[A](i: java.util.Iterator[A]): AsScala[Iterator[A]]
Adds an
asScalamethod that implicitly converts a JavaIteratorto a ScalaIterator.Adds an
asScalamethod that implicitly converts a JavaIteratorto a ScalaIterator.- See also
- implicit def asScalaSetConverter[A](s: java.util.Set[A]): AsScala[mutable.Set[A]]
Adds an
asScalamethod that implicitly converts a JavaSetto a Scala mutableSet.Adds an
asScalamethod that implicitly converts a JavaSetto a Scala mutableSet.- See also
- implicit def bufferAsJavaListConverter[A](b: Buffer[A]): AsJava[java.util.List[A]]
Adds an
asJavamethod that implicitly converts a Scala mutableBufferto a JavaList.Adds an
asJavamethod that implicitly converts a Scala mutableBufferto a JavaList.- See also
- def clone(): AnyRef
Create a copy of the receiver object.
Create a copy of the receiver object.
The default implementation of the
clonemethod is platform dependent.- returns
a copy of the receiver object.
- implicit def collectionAsScalaIterableConverter[A](i: Collection[A]): AsScala[Iterable[A]]
Adds an
asScalamethod that implicitly converts a JavaCollectionto an ScalaIterable.Adds an
asScalamethod that implicitly converts a JavaCollectionto an ScalaIterable.- See also
- implicit def dictionaryAsScalaMapConverter[K, V](p: Dictionary[K, V]): AsScala[mutable.Map[K, V]]
Adds an
asScalamethod that implicitly converts a JavaDictionaryto a Scala mutableMap.Adds an
asScalamethod that implicitly converts a JavaDictionaryto a Scala mutableMap.- See also
- implicit def enumerationAsScalaIteratorConverter[A](i: java.util.Enumeration[A]): AsScala[Iterator[A]]
Adds an
asScalamethod that implicitly converts a JavaEnumerationto a ScalaIterator.Adds an
asScalamethod that implicitly converts a JavaEnumerationto a ScalaIterator.- See also
- final def eq(arg0: AnyRef): Boolean
Tests whether the argument (
that) is a reference to the receiver object (this).Tests whether the argument (
that) is a reference to the receiver object (this).The
eqmethod implements an equivalence relation on non-null instances ofAnyRef, and has three additional properties:- It is consistent: for any non-null instances
xandyof typeAnyRef, multiple invocations ofx.eq(y)consistently returnstrueor consistently returnsfalse. - For any non-null instance
xof typeAnyRef,x.eq(null)andnull.eq(x)returnsfalse. null.eq(null)returnstrue.
When overriding the
equalsorhashCodemethods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).- returns
trueif the argument is a reference to the receiver object;falseotherwise.
- Definition Classes
- AnyRef
- It is consistent: for any non-null instances
- def equals(arg0: AnyRef): Boolean
The equality method for reference types.
- def finalize(): Unit
Called by the garbage collector on the receiver object when there are no more references to the object.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the
finalizemethod is invoked, as well as the interaction betweenfinalizeand non-local returns and exceptions, are all platform dependent.- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.Throwable])
- Note
not specified by SLS as a member of AnyRef
- final def getClass(): Class[_ <: AnyRef]
Returns the runtime class representation of the object.
- def hashCode(): Int
The hashCode method for reference types.
- final def isInstanceOf[T0]: Boolean
Test whether the dynamic type of the receiver object has the same erasure as
T0.Test whether the dynamic type of the receiver object has the same erasure as
T0.Depending on what
T0is, the test is done in one of the below ways:T0is a non-parameterized class type, e.g.BigDecimal: this method returnstrueif the value of the receiver object is aBigDecimalor a subtype ofBigDecimal.T0is a parameterized class type, e.g.List[Int]: this method returnstrueif the value of the receiver object is someList[X]for anyX. For example,List(1, 2, 3).isInstanceOf[List[String]]will return true.T0is some singleton typex.typeor literalx: this method returnsthis.eq(x). For example,x.isInstanceOf[1]is equivalent tox.eq(1)T0is an intersectionX with YorX & Y: this method is equivalent tox.isInstanceOf[X] && x.isInstanceOf[Y]T0is a unionX | Y: this method is equivalent tox.isInstanceOf[X] || x.isInstanceOf[Y]T0is a type parameter or an abstract type member: this method is equivalent toisInstanceOf[U]whereUisT0's upper bound,AnyifT0is unbounded. For example,x.isInstanceOf[A]whereAis an unbounded type parameter will return true for any value ofx.
This is exactly equivalent to the type pattern
_: T0- returns
trueif the receiver object is an instance of erasure of typeT0;falseotherwise.
- Definition Classes
- Any
- Note
due to the unexpectedness of
List(1, 2, 3).isInstanceOf[List[String]]returning true andx.isInstanceOf[A]whereAis a type parameter or abstract member returning true, these forms issue a warning.
- implicit def iterableAsScalaIterableConverter[A](i: java.lang.Iterable[A]): AsScala[Iterable[A]]
Adds an
asScalamethod that implicitly converts a JavaIterableto a ScalaIterable.Adds an
asScalamethod that implicitly converts a JavaIterableto a ScalaIterable.- See also
- implicit def mapAsJavaConcurrentMapConverter[K, V](m: concurrent.Map[K, V]): AsJava[ConcurrentMap[K, V]]
Adds an
asJavamethod that implicitly converts a Scala mutableconcurrent.Mapto a JavaConcurrentMap.Adds an
asJavamethod that implicitly converts a Scala mutableconcurrent.Mapto a JavaConcurrentMap.- See also
- implicit def mapAsJavaMapConverter[K, V](m: Map[K, V]): AsJava[java.util.Map[K, V]]
Adds an
asJavamethod that implicitly converts a ScalaMapto a JavaMap.Adds an
asJavamethod that implicitly converts a ScalaMapto a JavaMap.- See also
- implicit def mapAsScalaConcurrentMapConverter[K, V](m: ConcurrentMap[K, V]): AsScala[concurrent.Map[K, V]]
Adds an
asScalamethod that implicitly converts a JavaConcurrentMapto a Scala mutableconcurrent.Map.Adds an
asScalamethod that implicitly converts a JavaConcurrentMapto a Scala mutableconcurrent.Map.- See also
- implicit def mapAsScalaMapConverter[K, V](m: java.util.Map[K, V]): AsScala[mutable.Map[K, V]]
Adds an
asScalamethod that implicitly converts a JavaMapto a Scala mutableMap.Adds an
asScalamethod that implicitly converts a JavaMapto a Scala mutableMap.- See also
- implicit def mutableMapAsJavaMapConverter[K, V](m: mutable.Map[K, V]): AsJava[java.util.Map[K, V]]
Adds an
asJavamethod that implicitly converts a Scala mutableMapto a JavaMap.Adds an
asJavamethod that implicitly converts a Scala mutableMapto a JavaMap.- See also
- implicit def mutableSeqAsJavaListConverter[A](b: mutable.Seq[A]): AsJava[java.util.List[A]]
Adds an
asJavamethod that implicitly converts a Scala mutableSeqto a JavaList.Adds an
asJavamethod that implicitly converts a Scala mutableSeqto a JavaList.- See also
- implicit def mutableSetAsJavaSetConverter[A](s: mutable.Set[A]): AsJava[java.util.Set[A]]
Adds an
asJavamethod that implicitly converts a Scala mutableSetto a JavaSet.Adds an
asJavamethod that implicitly converts a Scala mutableSetto a JavaSet.- See also
- final def ne(arg0: AnyRef): Boolean
Equivalent to
!(this eq that).Equivalent to
!(this eq that).- returns
trueif the argument is not a reference to the receiver object;falseotherwise.
- Definition Classes
- AnyRef
- final def notify(): Unit
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up a single thread that is waiting on the receiver object's monitor.
- Definition Classes
- AnyRef
- Annotations
- @native()
- Note
not specified by SLS as a member of AnyRef
- final def notifyAll(): Unit
Wakes up all threads that are waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
- Definition Classes
- AnyRef
- Annotations
- @native()
- Note
not specified by SLS as a member of AnyRef
- implicit def propertiesAsScalaMapConverter(p: Properties): AsScala[mutable.Map[String, String]]
Adds an
asScalamethod that implicitly converts a JavaPropertiesto a Scala mutableMap[String, String].Adds an
asScalamethod that implicitly converts a JavaPropertiesto a Scala mutableMap[String, String].- See also
- implicit def seqAsJavaListConverter[A](b: Seq[A]): AsJava[java.util.List[A]]
Adds an
asJavamethod that implicitly converts a ScalaSeqto a JavaList.Adds an
asJavamethod that implicitly converts a ScalaSeqto a JavaList.- See also
- implicit def setAsJavaSetConverter[A](s: Set[A]): AsJava[java.util.Set[A]]
Adds an
asJavamethod that implicitly converts a ScalaSetto a JavaSet.Adds an
asJavamethod that implicitly converts a ScalaSetto a JavaSet.- See also
- final def synchronized[T0](arg0: => T0): T0
Executes the code in
bodywith an exclusive lock onthis.Executes the code in
bodywith an exclusive lock onthis.- returns
the result of
body
- Definition Classes
- AnyRef
- def toString(): String
Creates a String representation of this object.
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
- returns
a String representation of the object.
- Definition Classes
- AnyRef → Any
- final def wait(): Unit
See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--.
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- Note
not specified by SLS as a member of AnyRef
- final def wait(arg0: Long, arg1: Int): Unit
See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- Note
not specified by SLS as a member of AnyRef
- final def wait(arg0: Long): Unit
See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-.
Deprecated Value Members
- def asJavaIterable[A](i: Iterable[A]): java.lang.Iterable[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asJavainstead
- def asJavaIterator[A](i: Iterator[A]): java.util.Iterator[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asJavainstead
- def asScalaBuffer[A](l: java.util.List[A]): Buffer[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asScalainstead
- def asScalaIterator[A](i: java.util.Iterator[A]): Iterator[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asScalainstead
- def asScalaSet[A](s: java.util.Set[A]): mutable.Set[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asScalainstead
- def bufferAsJavaList[A](b: Buffer[A]): java.util.List[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asJavainstead
- def collectionAsScalaIterable[A](i: Collection[A]): Iterable[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asScalainstead
- def dictionaryAsScalaMap[A, B](p: Dictionary[A, B]): mutable.Map[A, B]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asScalainstead
- def enumerationAsScalaIterator[A](i: java.util.Enumeration[A]): Iterator[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asScalainstead
- def iterableAsScalaIterable[A](i: java.lang.Iterable[A]): Iterable[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asScalainstead
- def mapAsJavaConcurrentMap[K, V](m: concurrent.Map[K, V]): ConcurrentMap[K, V]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asJavainstead
- def mapAsJavaMap[K, V](m: Map[K, V]): java.util.Map[K, V]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asJavainstead
- def mapAsScalaConcurrentMap[A, B](m: ConcurrentMap[A, B]): concurrent.Map[A, B]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asScalainstead
- def mapAsScalaMap[A, B](m: java.util.Map[A, B]): mutable.Map[A, B]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asScalainstead
- def mutableMapAsJavaMap[K, V](m: mutable.Map[K, V]): java.util.Map[K, V]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asJavainstead
- def mutableSeqAsJavaList[A](s: mutable.Seq[A]): java.util.List[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asJavainstead
- def mutableSetAsJavaSet[A](s: mutable.Set[A]): java.util.Set[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asJavainstead
- def propertiesAsScalaMap(p: Properties): mutable.Map[String, String]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asScalainstead
- def seqAsJavaList[A](s: Seq[A]): java.util.List[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asJavainstead
- def setAsJavaSet[A](s: Set[A]): java.util.Set[A]
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
asJavainstead
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like
Int,Float,ArrayorOptionwhich are accessible in all Scala compilation units without explicit qualification or imports.Notable packages include:
scala.collectionand its sub-packages contain Scala's collections frameworkscala.collection.immutable- Immutable, sequential data-structures such asVector,List,Range,HashMaporHashSetscala.collection.mutable- Mutable, sequential data-structures such asArrayBuffer,StringBuilder,HashMaporHashSetscala.collection.concurrent- Mutable, concurrent data-structures such asTrieMapscala.concurrent- Primitives for concurrent programming such asFuturesandPromisesscala.io- Input and output operationsscala.math- Basic math functions and additional numeric types likeBigIntandBigDecimalscala.sys- Interaction with other processes and the operating systemscala.util.matching- Regular expressionsOther packages exist. See the complete list on the right.
Additional parts of the standard library are shipped as separate libraries. These include:
scala.reflect- Scala's reflection API (scala-reflect.jar)scala.xml- XML parsing, manipulation, and serialization (scala-xml.jar)scala.collection.parallel- Parallel collections (scala-parallel-collections.jar)scala.util.parsing- Parser combinators (scala-parser-combinators.jar)scala.swing- A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)Automatic imports
Identifiers in the scala package and the
scala.Predefobject are always in scope by default.Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example,
Listis an alias forscala.collection.immutable.List.Other aliases refer to classes provided by the underlying platform. For example, on the JVM,
Stringis an alias forjava.lang.String.