scala.collection

JavaConversions

object JavaConversions extends AnyRef

A collection of implicit conversions supporting interoperability between Scala and Java collections.

The following conversions are supported:

In all cases, converting from a source type to a target type and back again will return the original source object, eg.

   import scala.collection.JavaConversions._

val sl = new scala.collection.mutable.ListBuffer[Int] val jl : java.util.List[Int] = sl val sl2 : scala.collection.mutable.Buffer[Int] = jl assert(sl eq sl2)g

In addition, the following one way conversions are provided:

linear super types: AnyRef, Any
source: JavaConversions.scala
    since
  1. 2.8

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Type Members

  1. class ConcurrentMapWrapper [A, B] extends MutableMapWrapper[A, B] with ConcurrentMap[A, B]

  2. class DictionaryWrapper [A, B] (underlying: Map[A, B]) extends Dictionary[A, B] with Product

  3. class IterableWrapper [A] (underlying: Iterable[A]) extends AbstractCollection[A] with Product

  4. class IteratorWrapper [A] (underlying: Iterator[A]) extends Iterator[A] with Enumeration[A] with Product

  5. class JCollectionWrapper [A] (underlying: Collection[A]) extends Iterable[A] with Product

  6. class JConcurrentMapWrapper [A, B] (underlying: ConcurrentMap[A, B]) extends JMapWrapperLike[A, B, JConcurrentMapWrapper[A, B]] with ConcurrentMap[A, B] with Product

  7. class JDictionaryWrapper [A, B] (underlying: Dictionary[A, B]) extends Map[A, B] with Product

  8. class JEnumerationWrapper [A] (underlying: Enumeration[A]) extends Iterator[A] with Product

  9. class JIterableWrapper [A] (underlying: Iterable[A]) extends Iterable[A] with Product

  10. class JIteratorWrapper [A] (underlying: Iterator[A]) extends Iterator[A] with Product

  11. class JListWrapper [A] (underlying: List[A]) extends Buffer[A] with Product

  12. class JMapWrapper [A, B] (underlying: Map[A, B]) extends JMapWrapperLike[A, B, JMapWrapper[A, B]] with Product

  13. trait JMapWrapperLike [A, B, +Repr <: MapLike[A, B, Repr] with Map[A, B]] extends Map[A, B] with MapLike[A, B, Repr]

  14. class JPropertiesWrapper (underlying: Properties) extends Map[String, String] with MapLike[String, String, JPropertiesWrapper] with Product

  15. class JSetWrapper [A] (underlying: Set[A]) extends Set[A] with SetLike[A, JSetWrapper[A]] with Product

  16. class MapWrapper [A, B] extends AbstractMap[A, B]

  17. class MutableBufferWrapper [A] (underlying: Buffer[A]) extends AbstractList[A] with Product

  18. class MutableMapWrapper [A, B] (underlying: Map[A, B]) extends MapWrapper[A, B] with Product

  19. class MutableSeqWrapper [A] (underlying: Seq[A]) extends AbstractList[A] with Product

  20. class MutableSetWrapper [A] (underlying: Set[A]) extends SetWrapper[A] with Product

  21. class SeqWrapper [A] (underlying: Seq[A]) extends AbstractList[A] with Product

  22. class SetWrapper [A] extends AbstractSet[A]

Value Members

  1. def != (arg0: AnyRef) : Boolean

    attributes: final
    definition classes: AnyRef
  2. def != (arg0: Any) : Boolean

    o != arg0 is the same as !(o == (arg0)).

    o != arg0 is the same as !(o == (arg0)).

    arg0

    the object to compare against this object for dis-equality.

    returns

    false if the receiver object is equivalent to the argument; true otherwise.

    attributes: final
    definition classes: Any
  3. def ## () : Int

    attributes: final
    definition classes: AnyRef → Any
  4. def $asInstanceOf [T0] () : T0

    attributes: final
    definition classes: AnyRef
  5. def $isInstanceOf [T0] () : Boolean

    attributes: final
    definition classes: AnyRef
  6. def == (arg0: AnyRef) : Boolean

    o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).

    o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    attributes: final
    definition classes: AnyRef
  7. def == (arg0: Any) : Boolean

    o == arg0 is the same as o.equals(arg0).

    o == arg0 is the same as o.equals(arg0).

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    attributes: final
    definition classes: Any
  8. implicit def asBuffer [A] (l: List[A]) : Buffer[A]

    Implicitly converts a Java List to a Scala mutable Buffer.

    Implicitly converts a Java List to a Scala mutable Buffer. The returned Scala Buffer is backed by the provided JavaList 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.

    returns

    A Scala mutable Buffer view of the argument.

    attributes: implicit
  9. implicit def asCollection [A] (i: Iterable[A]) : Collection[A]

    Implicitly converts a Scala Iterable to an immutable JavaCollection.

    Implicitly converts a Scala Iterable to an immutable JavaCollection.

    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.

    returns

    A Java Collection view of the argument.

    attributes: implicit
  10. implicit def asConcurrentMap [A, B] (m: ConcurrentMap[A, B]) : ConcurrentMap[A, B]

    Implicitly converts a Java ConcurrentMap to a Scala mutable ConcurrentMap.

    Implicitly converts a Java ConcurrentMap to a Scala mutable ConcurrentMap. The returned Scala ConcurrentMap is backed by the provided JavaConcurrentMap 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 asConcurrentMap(scala.collection.mutable.ConcurrentMap) then the original Scala ConcurrentMap will be returned.

    m

    The ConcurrentMap to be converted.

    returns

    A Scala mutable ConcurrrentMap view of the argument.

    attributes: implicit
  11. implicit def asConcurrentMap [A, B] (m: ConcurrentMap[A, B]) : ConcurrentMap[A, B]

    Implicitly converts a Scala mutable ConcurrentMap to a Java ConcurrentMap.

    Implicitly converts a Scala mutable ConcurrentMap to a Java ConcurrentMap. The returned Java ConcurrentMap is backed by the provided Scala ConcurrentMapand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.

    If the Scala ConcurrentMap was previously obtained from an implicit or explicit call of asConcurrentMap(java.util.concurrect.ConcurrentMap) then the original Java ConcurrentMap will be returned.

    attributes: implicit
  12. implicit def asDictionary [A, B] (m: Map[A, B]) : Dictionary[A, B]

    Implicitly converts a Scala mutable Map to a Java Dictionary.

    Implicitly converts a Scala mutable Map to a Java Dictionary. The returned Java Dictionary is backed by the provided ScalaDictionary 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.

    returns

    A Java Dictionary view of the argument.

    attributes: implicit
  13. implicit def asEnumeration [A] (i: Iterator[A]) : Enumeration[A]

    Implicitly converts a Scala Iterator to a Java Enumeration.

    Implicitly converts a Scala Iterator to a Java Enumeration. The returned Java Enumeration is backed by the provided ScalaIterator 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.

    returns

    A Java Enumeration view of the argument.

    attributes: implicit
  14. def asInstanceOf [T0] : T0

    This method is used to cast the receiver object to be of type T0.

    This method is used to 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 expression1.asInstanceOf[String] will throw a ClassCastException at 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 typed.

    returns

    the receiver object.

    attributes: final
    definition classes: Any
  15. implicit def asIterable [A] (i: Collection[A]) : Iterable[A]

    Implicitly converts a Java Collection to an Scala Iterable.

    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.

    returns

    A Scala SizedIterable view of the argument.

    attributes: implicit
  16. implicit def asIterable [A] (i: Iterable[A]) : Iterable[A]

    Implicitly converts a Java Iterable to a Scala Iterable.

    Implicitly converts a Java Iterable to a Scala Iterable. The returned Scala Iterable is backed by the provided JavaIterable 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.

    returns

    A Scala Iterable view of the argument.

    attributes: implicit
  17. implicit def asIterable [A] (i: Iterable[A]) : Iterable[A]

    Implicitly converts a Scala Iterable to a Java Iterable.

    Implicitly converts a Scala Iterable to a Java Iterable. The returned Java Iterable is backed by the provided ScalaIterable 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.

    returns

    A Java Iterable view of the argument.

    attributes: implicit
  18. implicit def asIterator [A] (i: Enumeration[A]) : Iterator[A]

    Implicitly converts a Java Enumeration to a Scala Iterator.

    Implicitly converts a Java Enumeration to a Scala Iterator. The returned Scala Iterator is backed by the provided JavaEnumeration 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.

    returns

    A Scala Iterator view of the argument.

    attributes: implicit
  19. implicit def asIterator [A] (i: Iterator[A]) : Iterator[A]

    Implicitly converts a Java Iterator to a Scala Iterator.

    Implicitly converts a Java Iterator to a Scala Iterator. The returned Scala Iterator is backed by the provided JavaIterator 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.

    returns

    A Scala Iterator view of the argument.

    attributes: implicit
  20. implicit def asIterator [A] (i: Iterator[A]) : Iterator[A]

    Implicitly converts a Scala Iterator to a Java Iterator.

    Implicitly converts a Scala Iterator to a Java Iterator. The returned Java Iterator is backed by the provided ScalaIterator 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.

    i

    The Iterator to be converted.

    returns

    A Java Iterator view of the argument.

    attributes: implicit
  21. implicit def asList [A] (b: Seq[A]) : List[A]

    Implicitly converts a Scala Seq to a Java List.

    Implicitly converts a Scala Seq to a Java List. The returned Java List is backed by the provided ScalaSeq 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.

    returns

    A Java <code>List</co * de> view of the argument.

    attributes: implicit
  22. implicit def asList [A] (b: Seq[A]) : List[A]

    Implicitly converts a Scala mutable Seq to a Java List.

    Implicitly converts a Scala mutable Seq to a Java List. The returned Java List is backed by the provided ScalaSeq 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.

    returns

    A Java List view of the argument.

    attributes: implicit
  23. implicit def asList [A] (b: Buffer[A]) : List[A]

    Implicitly converts a Scala mutable Buffer to a Java List.

    Implicitly converts a Scala mutable Buffer to a Java List. The returned Java List is backed by the provided ScalaBuffer 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.

    returns

    A Java List view of the argument.

    attributes: implicit
  24. implicit def asMap [A, B] (p: Dictionary[A, B]) : Map[A, B]

    Implicitly converts a Java Dictionary to a Scala mutable Map[String, String].

    Implicitly converts a Java Dictionary to a Scala mutable Map[String, String]. The returned Scala Map[String, String] is backed by the provided JavaDictionary and any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.

    returns

    A Scala mutable Map[String, String] view of the argument.

    attributes: implicit
  25. implicit def asMap [A, B] (m: Map[A, B]) : Map[A, B]

    Implicitly converts a Java Map to a Scala mutable Map.

    Implicitly converts a Java Map to a Scala mutable Map. The returned Scala Map is backed by the provided JavaMap 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.

    m

    The Map to be converted.

    returns

    A Scala mutable Map view of the argument.

    attributes: implicit
  26. implicit def asMap [A, B] (m: Map[A, B]) : Map[A, B]

    Implicitly converts a Scala Map to a Java Map.

    Implicitly converts a Scala Map to a Java Map. The returned Java Map is backed by the provided ScalaMap 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.

    returns

    A Java Map view of the argument.

    attributes: implicit
  27. implicit def asMap (p: Properties) : Map[String, String]

    Implicitly converts a Java Properties to a Scala mutable Map[String, String].

    Implicitly converts a Java Properties to a Scala mutable Map[String, String]. The returned Scala Map[String, String] is backed by the provided JavaProperties and any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.

    returns

    A Scala mutable Map[String, String] view of the argument.

    attributes: implicit
  28. implicit def asMap [A, B] (m: Map[A, B]) : Map[A, B]

    Implicitly converts a Scala mutable Map to a Java Map.

    Implicitly converts a Scala mutable Map to a Java Map. The returned Java Map is backed by the provided ScalaMap 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.

    returns

    A Java Map view of the argument.

    attributes: implicit
  29. implicit def asSet [A] (s: Set[A]) : Set[A]

    Implicitly converts a Java Set to a Scala mutable Set.

    Implicitly converts a Java Set to a Scala mutable Set. The returned Scala Set is backed by the provided JavaSet 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 ScalaThe reported problems have to do with dependent method types, which is currently an experimental feature in Scala and is still under development. We emphasize that these problems are related to type-inference and, as stated in the paper, it is possible to run and type-check the programs with additional annotations. Set will be returned.

    s

    The Set to be converted.

    returns

    A Scala mutable Set view of the argument.

    attributes: implicit
  30. implicit def asSet [A] (s: Set[A]) : Set[A]

    Implicitly converts a Scala Set to a Java Set.

    Implicitly converts a Scala Set to a Java Set. The returned Java Set is backed by the provided ScalaSet 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.

    returns

    A Java Set view of the argument.

    attributes: implicit
  31. implicit def asSet [A] (s: Set[A]) : Set[A]

    Implicitly converts a Scala mutable Set to a Java Set.

    Implicitly converts a Scala mutable Set to a Java Set. The returned Java Set is backed by the provided ScalaSet 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.

    returns

    A Java Set view of the argument.

    attributes: implicit
  32. def clone () : AnyRef

    This method creates and returns a copy of the receiver object.

    This method creates and returns a copy of the receiver object.

    The default implementation of the clone method is platform dependent.

    returns

    a copy of the receiver object.

    attributes: protected
    definition classes: AnyRef
  33. def eq (arg0: AnyRef) : Boolean

    This method is used to test whether the argument (arg0) is a reference to the receiver object (this).

    This method is used to test whether the argument (arg0) is a reference to the receiver object (this).

    The eq method implements an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation] on non-null instances of AnyRef: * It is reflexive: for any non-null instance x of type AnyRef, x.eq(x) returns true. * It is symmetric: for any non-null instances x and y of type AnyRef, x.eq(y) returns true if and only if y.eq(x) returns true. * It is transitive: for any non-null instances x, y, and z of type AnyRef if x.eq(y) returns true and y.eq(z) returns true, then x.eq(z) returns true.

    Additionally, the eq method has three other 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).

    arg0

    the object to compare against this object for reference equality.

    returns

    true if the argument is a reference to the receiver object; false otherwise.

    attributes: final
    definition classes: AnyRef
  34. def equals (arg0: Any) : Boolean

    This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.

    This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.

    The default implementations of this method is an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation]: * It is reflexive: for any instance x of type Any, x.equals(x) should return true. * It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true. * It is transitive: for any instances x, y, and z of type AnyRef if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.

    If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is often necessary to override hashCode to ensure that objects that are "equal" (o1.equals(o2) returns true) hash to the same scala.Int (o1.hashCode.equals(o2.hashCode)).

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    definition classes: AnyRef → Any
  35. def finalize () : Unit

    This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.

    This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.

    The details of when and if the finalize method are invoked, as well as the interaction between finalizeand non-local returns and exceptions, are all platform dependent.

    attributes: protected
    definition classes: AnyRef
  36. def getClass () : java.lang.Class[_]

    Returns a representation that corresponds to the dynamic class of the receiver object.

    Returns a representation that corresponds to the dynamic class of the receiver object.

    The nature of the representation is platform dependent.

    returns

    a representation that corresponds to the dynamic class of the receiver object.

    attributes: final
    definition classes: AnyRef
  37. def hashCode () : Int

    Returns a hash code value for the object.

    Returns a hash code value for the object.

    The default hashing algorithm is platform dependent.

    Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)) yet not be equal (o1.equals(o2) returns false). A degenerate implementation could always return 0. However, it is required that if two objects are equal (o1.equals(o2) returns true) that they have identical hash codes (o1.hashCode.equals(o2.hashCode)). Therefore, when overriding this method, be sure to verify that the behavior is consistent with the equals method.

    returns

    the hash code value for the object.

    definition classes: AnyRef → Any
  38. def isInstanceOf [T0] : Boolean

    This method is used to test whether the dynamic type of the receiver object is T0.

    This method is used to test whether the dynamic type of the receiver object is T0.

    Note that the test result of the test is modulo Scala's erasure semantics. Therefore the expression1.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 requested typed.

    returns

    true if the receiver object is an instance of erasure of type T0; false otherwise.

    attributes: final
    definition classes: Any
  39. def ne (arg0: AnyRef) : Boolean

    o.ne(arg0) is the same as !(o.eq(arg0)).

    o.ne(arg0) is the same as !(o.eq(arg0)).

    arg0

    the object to compare against this object for reference dis-equality.

    returns

    false if the argument is not a reference to the receiver object; true otherwise.

    attributes: final
    definition classes: AnyRef
  40. 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.

    attributes: final
    definition classes: AnyRef
  41. 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.

    attributes: final
    definition classes: AnyRef
  42. def synchronized [T0] (arg0: T0) : T0

    attributes: final
    definition classes: AnyRef
  43. def toString () : String

    Returns a string representation of the object.

    Returns a string representation of the object.

    The default representation is platform dependent.

    returns

    a string representation of the object.

    definition classes: AnyRef → Any
  44. def wait () : Unit

    attributes: final
    definition classes: AnyRef
  45. def wait (arg0: Long, arg1: Int) : Unit

    attributes: final
    definition classes: AnyRef
  46. def wait (arg0: Long) : Unit

    attributes: final
    definition classes: AnyRef

Inherited from AnyRef

Inherited from Any