Scala Standard Library2.13.18 < Back


# Packages

-  package root

  This is the documentation for the Scala standard library.

  This is the documentation for the Scala standard library.

  #### Package structure

  The scala package contains core types like `Int`, `Float`, `Array` or `Option` which are accessible in all Scala compilation units without explicit qualification or imports.

  Notable packages include:

  - `scala.collection` and its sub-packages contain Scala's collections framework
    - `scala.collection.immutable` - Immutable, sequential data-structures such as `Vector`, `List`, `Range`, `HashMap` or `HashSet`
    - `scala.collection.mutable` - Mutable, sequential data-structures such as `ArrayBuffer`, `StringBuilder`, `HashMap` or `HashSet`
    - `scala.collection.concurrent` - Mutable, concurrent data-structures such as `TrieMap`
  - `scala.concurrent` - Primitives for concurrent programming such as `Futures` and `Promises`
  - `scala.io` - Input and output operations
  - `scala.math` - Basic math functions and additional numeric types like `BigInt` and `BigDecimal`
  - `scala.sys` - Interaction with other processes and the operating system
  - `scala.util.matching` - Regular expressions

  Other 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.Predef` object are always in scope by default.

  Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example, `List` is an alias for `scala.collection.immutable.List`.

  Other aliases refer to classes provided by the underlying platform. For example, on the JVM, `String` is an alias for `java.lang.String`.

  Definition Classes
    root
-  package scala

  Core Scala types.

  Core Scala types. They are always available without an explicit import.

  Definition Classes
    root
-  package collection
  Definition Classes
    scala
-  package concurrent
  Definition Classes
    collection
-  package convert
  Definition Classes
    collection
-  package generic
  Definition Classes
    collection
-  package immutable
  Definition Classes
    collection
-  package mutable
  Definition Classes
    collection
- +:
- :+
- AbstractIndexedSeqView
- AbstractIterable
- AbstractIterator
- AbstractMap
- AbstractMapView
- AbstractSeq
- AbstractSeqView
- AbstractSet
- AbstractView
- AnyStepper
- ArrayOps
- BitSet
- BitSetOps
- BufferedIterator
- BuildFrom
- BuildFromLowPriority1
- BuildFromLowPriority2
- ClassTagIterableFactory
- ClassTagSeqFactory
- DefaultMap
- DoubleStepper
- EvidenceIterableFactory
- EvidenceIterableFactoryDefaults
- Factory
- Hashing
- IndexedSeq
- IndexedSeqOps
- IndexedSeqView
- IntStepper
- Iterable
- IterableFactory
- IterableFactoryDefaults
- IterableOnce
- IterableOnceExtensionMethods
- IterableOnceOps
- IterableOps
- Iterator
- JavaConverters
- LazyZip2
- LazyZip3
- LazyZip4
- LinearSeq
- LinearSeqOps
- LongStepper
- Map
- MapFactory
- MapFactoryDefaults
- MapOps
- MapView
- MapViewFactory
- Searching
- Seq
- SeqFactory
- SeqMap
- SeqOps
- SeqView
- Set
- SetOps
- SortedIterableFactory
- SortedMap
- SortedMapFactory
- SortedMapFactoryDefaults
- SortedMapOps
- SortedOps
- SortedSet
- SortedSetFactoryDefaults
- SortedSetOps
- SpecificIterableFactory
- Stepper
- StepperShape
- StepperShapeLowPriority1
- StepperShapeLowPriority2
- StrictOptimizedClassTagSeqFactory
- StrictOptimizedIterableOps
- StrictOptimizedLinearSeqOps
- StrictOptimizedMapOps
- StrictOptimizedSeqFactory
- StrictOptimizedSeqOps
- StrictOptimizedSetOps
- StrictOptimizedSortedMapOps
- StrictOptimizedSortedSetOps
- StringOps
- StringView
- View
- WithFilter

o

scala.collection

# JavaConverters

###

#### 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.CollectionConverters` instead

Source
  JavaConverters.scala

Linear Supertypes
AsScalaConverters, AsJavaConverters, AnyRef, Any
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Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. JavaConverters
2. AsScalaConverters
3. AsJavaConverters
4. AnyRef
5. Any

1. Hide All
2. Show All

Visibility

1. Public
2. Protected

### Type Members

1.  class AsJava[A] extends AnyRef

   Generic class containing the `asJava` converter method

2.  class AsJavaCollection[A] extends AnyRef

   Generic class containing the `asJavaCollection` converter method

3.  class AsJavaDictionary[K, V] extends AnyRef

   Generic class containing the `asJavaDictionary` converter method

4.  class AsJavaEnumeration[A] extends AnyRef

   Generic class containing the `asJavaEnumeration` converter method

5.  class AsScala[A] extends AnyRef

   Generic class containing the `asScala` converter method

### Value Members

1.  final def !=(arg0: Any): Boolean

   Test two objects for inequality.

   Test two objects for inequality.

   returns

     `true` if !(this == that), false otherwise.

   Definition Classes
     AnyRef → Any
2.  final def ##: Int

   Equivalent to `x.hashCode` except for boxed numeric types and `null`.

   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
3.  final def ==(arg0: Any): Boolean

   The expression `x == that` is equivalent to `if (x eq null) that eq null else x.equals(that)`.

   The expression `x == that` is equivalent to `if (x eq null) that eq null else x.equals(that)`.

   returns

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

   Definition Classes
     AnyRef → Any
4.  final def asInstanceOf[T0]: T0

   Forces the compiler to treat the receiver object as having type `T0`, even though doing so may violate type safety.

   Forces the compiler to treat the receiver object as having type `T0`, even though doing so may violate type safety.

   This method is useful when you believe you have type information the compiler doesn't, and it also isn't possible to check the type at runtime. In such situations, skipping type safety is the only option.

   It is platform dependent whether `asInstanceOf` has any effect at runtime. It might do a runtime type test on the erasure of `T0`, insert a conversion (such as boxing/unboxing), fill in a default value, or do nothing at all.

   In particular, `asInstanceOf` is not a type test. It does **not** mean:

       this match {
        case x: T0 => x
        case _     => throw ClassCastException("...")

   Use pattern matching or isInstanceOf for type testing instead.

   Situations where `asInstanceOf` is useful:

   - when flow analysis fails to deduce `T0` automatically
   - when down-casting a type parameter or an abstract type member (which cannot be checked at runtime due to type erasure) If there is any doubt and you are able to type test instead, you should do so.

   Be careful of using `asInstanceOf` when `T0` is a primitive type. When `T0` is primitive, `asInstanceOf` may insert a conversion instead of a type test. If your intent is to convert, use a `toT` method (`x.toChar`, `x.toByte`, etc.).

   returns

     the receiver object.

   Definition Classes
     Any
   Exceptions thrown

     `ClassCastException` if the receiver is not an instance of the erasure of `T0`, if that can be checked on this platform

5.  def asJava[K, V](m: concurrent.Map[K, V]): ConcurrentMap[K, V]

   Converts a Scala mutable `concurrent.Map` to a Java `ConcurrentMap`.

   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.Map` to be converted.

   returns

     A Java `ConcurrentMap` view of the argument.

   Definition Classes
     AsJavaConverters
6.  def asJava[K, V](m: Map[K, V]): java.util.Map[K, V]

   Converts a Scala `Map` to a Java `Map`.

   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 `Map` to be converted.

   returns

     A Java `Map` view of the argument.

   Definition Classes
     AsJavaConverters
7.  def asJava[K, V](m: mutable.Map[K, V]): java.util.Map[K, V]

   Converts a Scala mutable `Map` to a Java `Map`.

   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 `Map` to be converted.

   returns

     A Java `Map` view of the argument.

   Definition Classes
     AsJavaConverters
8.  def asJava[A](s: Set[A]): java.util.Set[A]

   Converts a Scala `Set` to a Java `Set`.

   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 `Set` to be converted.

   returns

     A Java `Set` view of the argument.

   Definition Classes
     AsJavaConverters
9.  def asJava[A](s: mutable.Set[A]): java.util.Set[A]

   Converts a Scala mutable `Set` to a Java `Set`.

   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 `Set` to be converted.

   returns

     A Java `Set` view of the argument.

   Definition Classes
     AsJavaConverters
10.  def asJava[A](s: Seq[A]): java.util.List[A]

    Converts a Scala `Seq` to a Java `List`.

    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 `Seq` to be converted.

    returns

      A Java `List` view of the argument.

    Definition Classes
      AsJavaConverters
11.  def asJava[A](s: mutable.Seq[A]): java.util.List[A]

    Converts a Scala mutable `Seq` to a Java `List`.

    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 `Seq` to be converted.

    returns

      A Java `List` view of the argument.

    Definition Classes
      AsJavaConverters
12.  def asJava[A](b: Buffer[A]): java.util.List[A]

    Converts a Scala mutable `Buffer` to a Java List.

    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 `Buffer` to be converted.

    returns

      A Java `List` view of the argument.

    Definition Classes
      AsJavaConverters
13.  def asJava[A](i: Iterable[A]): java.lang.Iterable[A]

    Converts a Scala `Iterable` to a Java `Iterable`.

    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 `Iterable` to be converted.

    returns

      A Java `Iterable` view of the argument.

    Definition Classes
      AsJavaConverters
14.  def asJava[A](i: Iterator[A]): java.util.Iterator[A]

    Converts a Scala `Iterator` to a Java `Iterator`.

    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 `Iterator` to be converted.

    returns

      A Java `Iterator` view of the argument.

    Definition Classes
      AsJavaConverters
15.  def asJavaCollection[A](i: Iterable[A]): Collection[A]

    Converts a Scala `Iterable` to an immutable Java `Collection`.

    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 `Iterable` to be converted.

    returns

      A Java `Collection` view of the argument.

    Definition Classes
      AsJavaConverters
16.  implicit def asJavaCollectionConverter[A](i: Iterable[A]): AsJavaCollection[A]

    Adds an `asJavaCollection` method that implicitly converts a Scala `Iterable` to an immutable Java `Collection`.

    Adds an `asJavaCollection` method that implicitly converts a Scala `Iterable` to an immutable Java `Collection`.

    See also

      asJavaCollection

17.  def asJavaDictionary[K, V](m: mutable.Map[K, V]): Dictionary[K, V]

    Converts a Scala mutable `Map` to a Java `Dictionary`.

    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 `Map` to be converted.

    returns

      A Java `Dictionary` view of the argument.

    Definition Classes
      AsJavaConverters
18.  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`.

    Adds an `asJavaDictionary` method that implicitly converts a Scala mutable `Map` to a Java `Dictionary`.

    See also

      asJavaDictionary

19.  def asJavaEnumeration[A](i: Iterator[A]): java.util.Enumeration[A]

    Converts a Scala `Iterator` to a Java `Enumeration`.

    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 `Iterator` to be converted.

    returns

      A Java `Enumeration` view of the argument.

    Definition Classes
      AsJavaConverters
20.  implicit def asJavaEnumerationConverter[A](i: Iterator[A]): AsJavaEnumeration[A]

    Adds an `asJavaEnumeration` method that implicitly converts a Scala `Iterator` to a Java `Enumeration`.

    Adds an `asJavaEnumeration` method that implicitly converts a Scala `Iterator` to a Java `Enumeration`.

    See also

      asJavaEnumeration

21.  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`.

    Adds an `asJava` method that implicitly converts a Scala `Iterable` to a Java `Iterable`.

    See also

      asJavaIterable

22.  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`.

    Adds an `asJava` method that implicitly converts a Scala `Iterator` to a Java `Iterator`.

    See also

      asJavaIterator

23.  def asScala(p: Properties): mutable.Map[String, String]

    Converts a Java `Properties` to a Scala 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 `Properties` to be converted.

    returns

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

    Definition Classes
      AsScalaConverters
24.  def asScala[K, V](d: Dictionary[K, V]): mutable.Map[K, V]

    Converts a Java `Dictionary` to a Scala mutable `Map`.

    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 `Dictionary` to be converted.

    returns

      A Scala mutable `Map` view of the argument.

    Definition Classes
      AsScalaConverters
25.  def asScala[K, V](m: ConcurrentMap[K, V]): concurrent.Map[K, V]

    Converts a Java `ConcurrentMap` to a Scala mutable `ConcurrentMap`.

    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 `ConcurrentMap` to be converted.

    returns

      A Scala mutable `ConcurrentMap` view of the argument.

    Definition Classes
      AsScalaConverters
26.  def asScala[K, V](m: java.util.Map[K, V]): mutable.Map[K, V]

    Converts a Java `Map` to a Scala mutable `Map`.

    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 `Map` to be converted.

    returns

      A Scala mutable `Map` view of the argument.

    Definition Classes
      AsScalaConverters
27.  def asScala[A](s: java.util.Set[A]): mutable.Set[A]

    Converts a Java `Set` to a Scala mutable `Set`.

    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 `Set` to be converted.

    returns

      A Scala mutable `Set` view of the argument.

    Definition Classes
      AsScalaConverters
28.  def asScala[A](l: java.util.List[A]): Buffer[A]

    Converts a Java `List` to a Scala mutable `Buffer`.

    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 `List` to be converted.

    returns

      A Scala mutable `Buffer` view of the argument.

    Definition Classes
      AsScalaConverters
29.  def asScala[A](c: Collection[A]): Iterable[A]

    Converts a Java `Collection` to a Scala `Iterable`.

    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 `Collection` to be converted.

    returns

      A Scala `Iterable` view of the argument.

    Definition Classes
      AsScalaConverters
30.  def asScala[A](i: java.lang.Iterable[A]): Iterable[A]

    Converts a Java `Iterable` to a Scala `Iterable`.

    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 `Iterable` to be converted.

    returns

      A Scala `Iterable` view of the argument.

    Definition Classes
      AsScalaConverters
31.  def asScala[A](e: java.util.Enumeration[A]): Iterator[A]

    Converts a Java `Enumeration` to a Scala `Iterator`.

    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 `Enumeration` to be converted.

    returns

      A Scala `Iterator` view of the argument.

    Definition Classes
      AsScalaConverters
32.  def asScala[A](i: java.util.Iterator[A]): Iterator[A]

    Converts a Java `Iterator` to a Scala `Iterator`.

    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 `Iterator` to be converted.

    returns

      A Scala `Iterator` view of the argument.

    Definition Classes
      AsScalaConverters
33.  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`.

    Adds an `asScala` method that implicitly converts a Java `List` to a Scala mutable `Buffer`.

    See also

      asScalaBuffer

34.  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`.

    Adds an `asScala` method that implicitly converts a Java `Iterator` to a Scala `Iterator`.

    See also

      asScalaIterator

35.  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`.

    Adds an `asScala` method that implicitly converts a Java `Set` to a Scala mutable `Set`.

    See also

      asScalaSet

36.  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`.

    Adds an `asJava` method that implicitly converts a Scala mutable `Buffer` to a Java `List`.

    See also

      bufferAsJavaList

37.  def clone(): AnyRef

    Create a copy of the receiver object.

    Create 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[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.CloneNotSupportedException]) @native()
    Note

      not specified by SLS as a member of AnyRef

38.  implicit def collectionAsScalaIterableConverter[A](i: Collection[A]): AsScala[Iterable[A]]

    Adds an `asScala` method that implicitly converts a Java `Collection` to an Scala `Iterable`.

    Adds an `asScala` method that implicitly converts a Java `Collection` to an Scala `Iterable`.

    See also

      collectionAsScalaIterable

39.  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`.

    Adds an `asScala` method that implicitly converts a Java `Dictionary` to a Scala mutable `Map`.

    See also

      dictionaryAsScalaMap

40.  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`.

    Adds an `asScala` method that implicitly converts a Java `Enumeration` to a Scala `Iterator`.

    See also

      enumerationAsScalaIterator

41.  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 `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

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

    Definition Classes
      AnyRef
42.  def equals(arg0: AnyRef): Boolean

    The equality method for reference types.

    The equality method for reference types. Default implementation delegates to `eq`.

    See also `equals` in scala.Any.

    returns

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

    Definition Classes
      AnyRef → Any
43.  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 `finalize` method is invoked, as well as the interaction between `finalize` and 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

44.  final def getClass(): Class[_ <: AnyRef]

    Returns the runtime class representation of the object.

    Returns the runtime class representation of the object.

    returns

      a class object corresponding to the runtime type of the receiver.

    Definition Classes
      AnyRef → Any
    Annotations
      @native()
45.  def hashCode(): Int

    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in scala.Any.

    returns

      the hash code value for this object.

    Definition Classes
      AnyRef → Any
    Annotations
      @native()
46.  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 `T0` is, the test is done in one of the below ways:

    - `T0` is a non-parameterized class type, e.g. `BigDecimal`: this method returns `true` if the value of the receiver object is a `BigDecimal` or a subtype of `BigDecimal`.
    - `T0` is a parameterized class type, e.g. `List[Int]`: this method returns `true` if the value of the receiver object is some `List[X]` for any `X`. For example, `List(1, 2, 3).isInstanceOf[List[String]]` will return true.
    - `T0` is some singleton type `x.type` or literal `x`: this method returns `this.eq(x)`. For example, `x.isInstanceOf[1]` is equivalent to `x.eq(1)`
    - `T0` is an intersection `X with Y` or `X & Y: this method is equivalent to` x.isInstanceOf[X] && x.isInstanceOf[Y]``
    - `T0` is a union `X | Y`: this method is equivalent to `x.isInstanceOf[X] || x.isInstanceOf[Y]`
    - `T0` is a type parameter or an abstract type member: this method is equivalent to `isInstanceOf[U]` where `U` is `T0`'s upper bound, `Any` if `T0` is unbounded. For example, `x.isInstanceOf[A]` where `A` is an unbounded type parameter will return true for any value of `x`.

    This is exactly equivalent to the type pattern `_: T0`

    returns

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

    Definition Classes
      Any
    Note

      due to the unexpectedness of `List(1, 2, 3).isInstanceOf[List[String]]` returning true and `x.isInstanceOf[A]` where `A` is a type parameter or abstract member returning true, these forms issue a warning.

47.  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`.

    Adds an `asScala` method that implicitly converts a Java `Iterable` to a Scala `Iterable`.

    See also

      iterableAsScalaIterable

48.  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`.

    Adds an `asJava` method that implicitly converts a Scala mutable `concurrent.Map` to a Java `ConcurrentMap`.

    See also

      mapAsJavaConcurrentMap.

49.  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`.

    Adds an `asJava` method that implicitly converts a Scala `Map` to a Java `Map`.

    See also

      mapAsJavaMap

50.  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`.

    Adds an `asScala` method that implicitly converts a Java `ConcurrentMap` to a Scala mutable `concurrent.Map`.

    See also

      mapAsScalaConcurrentMap

51.  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`.

    Adds an `asScala` method that implicitly converts a Java `Map` to a Scala mutable `Map`.

    See also

      mapAsScalaMap

52.  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`.

    Adds an `asJava` method that implicitly converts a Scala mutable `Map` to a Java `Map`.

    See also

      mutableMapAsJavaMap

53.  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`.

    Adds an `asJava` method that implicitly converts a Scala mutable `Seq` to a Java `List`.

    See also

      mutableSeqAsJavaList

54.  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`.

    Adds an `asJava` method that implicitly converts a Scala mutable `Set` to a Java `Set`.

    See also

      mutableSetAsJavaSet

55.  final def ne(arg0: AnyRef): Boolean

    Equivalent to `!(this eq that)`.

    Equivalent to `!(this eq that)`.

    returns

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

    Definition Classes
      AnyRef
56.  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

57.  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

58.  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]`.

    Adds an `asScala` method that implicitly converts a Java `Properties` to a Scala mutable `Map[String, String]`.

    See also

      propertiesAsScalaMap

59.  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`.

    Adds an `asJava` method that implicitly converts a Scala `Seq` to a Java `List`.

    See also

      seqAsJavaList

60.  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`.

    Adds an `asJava` method that implicitly converts a Scala `Set` to a Java `Set`.

    See also

      setAsJavaSet

61.  final def synchronized[T0](arg0: => T0): T0

    Executes the code in `body` with an exclusive lock on `this`.

    Executes the code in `body` with an exclusive lock on `this`.

    returns

      the result of `body`

    Definition Classes
      AnyRef
62.  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
63.  final def wait(): Unit

    See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--.

    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

64.  final def wait(arg0: Long, arg1: Int): Unit

    See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-

    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

65.  final def wait(arg0: Long): Unit

    See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-.

    See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-.

    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.InterruptedException]) @native()
    Note

      not specified by SLS as a member of AnyRef

### Deprecated Value Members

1.  def asJavaIterable[A](i: Iterable[A]): java.lang.Iterable[A]
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use `asJava` instead

2.  def asJavaIterator[A](i: Iterator[A]): java.util.Iterator[A]
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use `asJava` instead

3.  def asScalaBuffer[A](l: java.util.List[A]): Buffer[A]
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use `asScala` instead

4.  def asScalaIterator[A](i: java.util.Iterator[A]): Iterator[A]
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use `asScala` instead

5.  def asScalaSet[A](s: java.util.Set[A]): mutable.Set[A]
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use `asScala` instead

6.  def bufferAsJavaList[A](b: Buffer[A]): java.util.List[A]
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use `asJava` instead

7.  def collectionAsScalaIterable[A](i: Collection[A]): Iterable[A]
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use `asScala` instead

8.  def dictionaryAsScalaMap[A, B](p: Dictionary[A, B]): mutable.Map[A, B]
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use `asScala` instead

9.  def enumerationAsScalaIterator[A](i: java.util.Enumeration[A]): Iterator[A]
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use `asScala` instead

10.  def iterableAsScalaIterable[A](i: java.lang.Iterable[A]): Iterable[A]
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `asScala` instead

11.  def mapAsJavaConcurrentMap[K, V](m: concurrent.Map[K, V]): ConcurrentMap[K, V]
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `asJava` instead

12.  def mapAsJavaMap[K, V](m: Map[K, V]): java.util.Map[K, V]
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `asJava` instead

13.  def mapAsScalaConcurrentMap[A, B](m: ConcurrentMap[A, B]): concurrent.Map[A, B]
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `asScala` instead

14.  def mapAsScalaMap[A, B](m: java.util.Map[A, B]): mutable.Map[A, B]
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `asScala` instead

15.  def mutableMapAsJavaMap[K, V](m: mutable.Map[K, V]): java.util.Map[K, V]
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `asJava` instead

16.  def mutableSeqAsJavaList[A](s: mutable.Seq[A]): java.util.List[A]
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `asJava` instead

17.  def mutableSetAsJavaSet[A](s: mutable.Set[A]): java.util.Set[A]
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `asJava` instead

18.  def propertiesAsScalaMap(p: Properties): mutable.Map[String, String]
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `asScala` instead

19.  def seqAsJavaList[A](s: Seq[A]): java.util.List[A]
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `asJava` instead

20.  def setAsJavaSet[A](s: Set[A]): java.util.Set[A]
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `asJava` instead

### Inherited from AsScalaConverters

### Inherited from AsJavaConverters

### Inherited from AnyRef

### Inherited from Any

### Ungrouped