Object scala.collection.JavaConverters
object JavaConverters extends AsJavaConverters with AsScalaConverters
Type Members
class AsJava[A] extends AnyRef
class AsJavaCollection[A] extends AnyRef
class AsJavaDictionary[K, V] extends AnyRef
class AsJavaEnumeration[A] extends AnyRef
class AsScala[A] extends AnyRef
Value Members
final def !=(arg0: Any): Boolean
Test two objects for inequality.
- returns
trueif !(this == that), false otherwise.
- Definition Classes
- AnyRef → Any
final def ##(): Int
Equivalent to x.hashCode except for boxed numeric types and null. 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. For null returns a hashcode where null.hashCode throws a NullPointerException.
- returns
a hash value consistent with ==
- Definition Classes
- AnyRef → Any
final def ==(arg0: Any): Boolean
The expression x == that is equivalent to if (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.
Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression 1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expression List(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.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 asScala then the original Java ConcurrentMap will 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 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 asScala then the original Java Map will 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 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 asScala then the original Java Map will 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 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 asScala then the original Java Set will 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 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 asScala then the original Java Set will 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 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 asScala then the original Java List will 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 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 asScala then the original Java List will 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 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 asScala then the original Java List will 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 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 asScala then the original Java Iterable will 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 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 asScala then the original Java Iterator will 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 Iterable to an immutable Java Collection.
If the Scala Iterable was previously obtained from an implicit or explicit call of asScala then the original Java Collection will 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 asJavaCollection method that implicitly converts a Scala Iterable to an immutable Java Collection.
- See also
def asJavaDictionary[K, V](m: mutable.Map[K, V]): Dictionary[K, V]
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 Map was previously obtained from an implicit or explicit call of asScala then the original Java Dictionary will 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 asJavaDictionary method that implicitly converts a Scala mutable Map to a Java Dictionary.
- See also
def asJavaEnumeration[A](i: Iterator[A]): java.util.Enumeration[A]
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 asScala then the original Java Enumeration will 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 asJavaEnumeration method that implicitly converts a Scala Iterator to a Java Enumeration.
- See also
implicit def asJavaIterableConverter[A](i: Iterable[A]): AsJava[java.lang.Iterable[A]]
Adds an asJava method that implicitly converts a Scala Iterable to a Java Iterable.
- See also
implicit def asJavaIteratorConverter[A](i: Iterator[A]): AsJava[java.util.Iterator[A]]
Adds an asJava method that implicitly converts a Scala Iterator to a Java Iterator.
- See also
def asScala(p: Properties): mutable.Map[String, String]
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 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 Dictionary to a Scala mutable Map.
The returned Scala Map 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.
If the Java Dictionary was previously obtained from an implicit or explicit call of asJavaDictionary then the original Scala Map will 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 ConcurrentMap to a Scala mutable ConcurrentMap.
The returned Scala ConcurrentMap 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 asJava then the original Scala ConcurrentMap will 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 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 asJava 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 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 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 asJava then the original Scala Set will 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 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 asJava then the original Scala Buffer will 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 Collection to a Scala Iterable.
If the Java Collection was previously obtained from an implicit or explicit call of asJavaCollection then the original Scala Iterable will 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 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 asJava then the original Scala Iterable will 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 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 asJavaEnumeration then the original Scala Iterator will 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 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 asJava then the original Scala Iterator will 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 asScala method that implicitly converts a Java List to a Scala mutable Buffer.
- See also
implicit def asScalaIteratorConverter[A](i: java.util.Iterator[A]): AsScala[Iterator[A]]
Adds an asScala method that implicitly converts a Java Iterator to a Scala Iterator.
- See also
implicit def asScalaSetConverter[A](s: java.util.Set[A]): AsScala[mutable.Set[A]]
Adds an asScala method that implicitly converts a Java Set to a Scala mutable Set.
- See also
implicit def bufferAsJavaListConverter[A](b: Buffer[A]): AsJava[java.util.List[A]]
Adds an asJava method that implicitly converts a Scala mutable Buffer to a Java List.
- See also
def clone(): AnyRef
Create a copy of the receiver object.
The default implementation of the clone method is platform dependent.
- returns
a copy of the receiver object.
implicit def collectionAsScalaIterableConverter[A](i: Collection[A]): AsScala[Iterable[A]]
Adds an asScala method that implicitly converts a Java Collection to an Scala Iterable.
- See also
implicit def dictionaryAsScalaMapConverter[K, V](p: Dictionary[K, V]): AsScala[mutable.Map[K, V]]
Adds an asScala method that implicitly converts a Java Dictionary to a Scala mutable Map.
- See also
implicit def enumerationAsScalaIteratorConverter[A](i: java.util.Enumeration[A]): AsScala[Iterator[A]]
Adds an asScala method that implicitly converts a Java Enumeration to a Scala Iterator.
- See also
final def eq(arg0: AnyRef): Boolean
Tests whether the argument (that) is a reference to the receiver object (this).
The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional properties:
-
It is consistent: for any non-null instances
x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false.For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false.
null.eq(null) returns true. When overriding the equals or hashCode methods, 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
def equals(arg0: AnyRef): Boolean
The equality method for reference types. Default implementation delegates to eq.
See also equals in scala.Any.
- returns
trueif the receiver object is equivalent to the argument;falseotherwise.
- Definition Classes
- AnyRef → Any
def finalize(): Unit
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 finalize method is invoked, as well as the interaction between finalize and non-local returns and exceptions, are all platform dependent.
final def getClass(): Class[_ <: AnyRef]
Returns the runtime class representation of the object.
- returns
a class object corresponding to the runtime type of the receiver.
def hashCode(): Int
The hashCode method for reference types. See hashCode in scala.Any.
- returns
the hash code value for this object.
final def isInstanceOf[T0]: Boolean
Test whether the dynamic type of the receiver object is T0.
Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. 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 specified type.
- returns
trueif the receiver object is an instance of erasure of typeT0;falseotherwise.
- Definition Classes
- Any
implicit def iterableAsScalaIterableConverter[A](i: java.lang.Iterable[A]): AsScala[Iterable[A]]
Adds an asScala method that implicitly converts a Java Iterable to a Scala Iterable.
- See also
implicit def mapAsJavaConcurrentMapConverter[K, V](m: concurrent.Map[K, V]): AsJava[ConcurrentMap[K, V]]
Adds an asJava method that implicitly converts a Scala mutable concurrent.Map to a Java ConcurrentMap.
- See also
implicit def mapAsJavaMapConverter[K, V](m: Map[K, V]): AsJava[java.util.Map[K, V]]
Adds an asJava method that implicitly converts a Scala Map to a Java Map.
- See also
implicit def mapAsScalaConcurrentMapConverter[K, V](m: ConcurrentMap[K, V]): AsScala[concurrent.Map[K, V]]
Adds an asScala method that implicitly converts a Java ConcurrentMap to a Scala mutable concurrent.Map.
- See also
implicit def mapAsScalaMapConverter[K, V](m: java.util.Map[K, V]): AsScala[mutable.Map[K, V]]
Adds an asScala method that implicitly converts a Java Map to a Scala mutable Map.
- See also
implicit def mutableMapAsJavaMapConverter[K, V](m: mutable.Map[K, V]): AsJava[java.util.Map[K, V]]
Adds an asJava method that implicitly converts a Scala mutable Map to a Java Map.
- See also
implicit def mutableSeqAsJavaListConverter[A](b: mutable.Seq[A]): AsJava[java.util.List[A]]
Adds an asJava method that implicitly converts a Scala mutable Seq to a Java List.
- See also
implicit def mutableSetAsJavaSetConverter[A](s: mutable.Set[A]): AsJava[java.util.Set[A]]
Adds an asJava method that implicitly converts a Scala mutable Set to a Java Set.
- See also
final def ne(arg0: AnyRef): Boolean
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.
- 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.
- 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 asScala method that implicitly converts a Java Properties to a Scala mutable Map[String, String].
- See also
implicit def seqAsJavaListConverter[A](b: Seq[A]): AsJava[java.util.List[A]]
Adds an asJava method that implicitly converts a Scala Seq to a Java List.
- See also
implicit def setAsJavaSetConverter[A](s: Set[A]): AsJava[java.util.Set[A]]
Adds an asJava method that implicitly converts a Scala Set to a Java Set.
- See also
final def synchronized[T0](arg0: => T0): T0
- Definition Classes
- AnyRef
def toString(): String
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
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
final def wait(arg0: Long): Unit
© 2002-2019 EPFL, with contributions from Lightbend.
Licensed under the Apache License, Version 2.0.
https://www.scala-lang.org/api/2.13.0/scala/collection/JavaConverters$.html
A variety of decorators that enable converting between Scala and Java collections using extension methods,
asScalaandasJava.The extension methods return adapters for the corresponding API.
The following conversions are supported via
asScalaandasJava:The following conversions are supported via
asScalaand through specially-named extension methods to convert to Java collections, as shown:In addition, the following one-way conversions are provided via
asJava:The following one way conversion is provided via
asScala:In all cases, converting from a source type to a target type and back again will return the original source object. For example:
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)(Since version 2.13.0) Use
scala.jdk.CollectionConvertersinstead2.8.1