object WrapAsJava extends WrapAsJava
- Annotations
- @deprecated
- Deprecated
(Since version 2.12.0) use JavaConverters or consider ImplicitConversionsToJava
- Source
- WrapAsJava.scala
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final
def
!=(arg0: Any): Boolean
Test two objects for inequality.
Test two objects for inequality.
- returns
trueif !(this == that), false otherwise.
- Definition Classes
- AnyRef → Any
-
final
def
##(): Int
Equivalent to
x.hashCodeexcept for boxed numeric types andnull.Equivalent to
x.hashCodeexcept for boxed numeric types andnull. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. Fornullreturns a hashcode wherenull.hashCodethrows aNullPointerException.- returns
a hash value consistent with ==
- Definition Classes
- AnyRef → Any
-
final
def
==(arg0: Any): Boolean
The expression
x == thatis equivalent toif (x eq null) that eq null else x.equals(that).The expression
x == thatis equivalent toif (x eq null) that eq null else x.equals(that).- returns
trueif the receiver object is equivalent to the argument;falseotherwise.
- Definition Classes
- AnyRef → Any
-
final
def
asInstanceOf[T0]: T0
Cast the receiver object to be of type
T0.Cast the receiver object to be of type
T0.Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression
1.asInstanceOf[String]will throw aClassCastExceptionat runtime, while the expressionList(1).asInstanceOf[List[String]]will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.- returns
the receiver object.
- Definition Classes
- Any
- Exceptions thrown
ClassCastExceptionif the receiver object is not an instance of the erasure of typeT0.
-
implicit
def
asJavaCollection[A](it: Iterable[A]): Collection[A]
Implicitly converts a Scala Iterable to an immutable Java Collection.
Implicitly converts a Scala Iterable to an immutable Java Collection.
If the Scala Iterable was previously obtained from an implicit or explicit call of
asSizedIterable(java.util.Collection)then the original Java Collection will be returned.- it
The SizedIterable to be converted.
- returns
A Java Collection view of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
implicit
def
asJavaDictionary[A, B](m: mutable.Map[A, B]): Dictionary[A, B]
Implicitly converts a Scala mutable
Mapto a JavaDictionary.Implicitly converts a Scala mutable
Mapto a JavaDictionary.The returned Java
Dictionaryis backed by the provided ScalaDictionaryand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Dictionarywas previously obtained from an implicit or explicit call ofasMap(java.util.Dictionary)then the original Java Dictionary will be returned.- m
The
Mapto be converted.- returns
A Java
Dictionaryview of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
implicit
def
asJavaEnumeration[A](it: Iterator[A]): java.util.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 Scala Iterator and any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.
If the Scala Iterator was previously obtained from an implicit or explicit call of
asIterator(java.util.Enumeration)then the original Java Enumeration will be returned.- it
The Iterator to be converted.
- returns
A Java Enumeration view of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
implicit
def
asJavaIterable[A](i: Iterable[A]): java.lang.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 Scala Iterable and any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.
If the Scala Iterable was previously obtained from an implicit or explicit call of
asIterable(java.lang.Iterable)then the original Java Iterable will be returned.- i
The Iterable to be converted.
- returns
A Java Iterable view of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
implicit
def
asJavaIterator[A](it: Iterator[A]): java.util.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 Scala Iterator and any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.
If the Scala Iterator was previously obtained from an implicit or explicit call of
asIterator(java.util.Iterator)then the original Java Iterator will be returned.- it
The Iterator to be converted.
- returns
A Java Iterator view of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
implicit
def
bufferAsJavaList[A](b: Buffer[A]): java.util.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 Scala Buffer and any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.
If the Scala Buffer was previously obtained from an implicit or explicit call of
asBuffer(java.util.List)then the original Java List will be returned.- b
The Buffer to be converted.
- returns
A Java List view of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
def
clone(): AnyRef
Create a copy of the receiver object.
-
implicit
def
deprecated asJavaCollection[A](it: Iterable[A]): Collection[A]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated asJavaDictionary[A, B](m: mutable.Map[A, B]): Dictionary[A, B]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated asJavaEnumeration[A](it: Iterator[A]): java.util.Enumeration[A]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated asJavaIterable[A](i: Iterable[A]): java.lang.Iterable[A]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated asJavaIterator[A](it: Iterator[A]): java.util.Iterator[A]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated bufferAsJavaList[A](b: Buffer[A]): java.util.List[A]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated mapAsJavaConcurrentMap[A, B](m: concurrent.Map[A, B]): ConcurrentMap[A, B]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated mapAsJavaMap[A, B](m: Map[A, B]): java.util.Map[A, B]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated mutableMapAsJavaMap[A, B](m: mutable.Map[A, B]): java.util.Map[A, B]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated mutableSeqAsJavaList[A](seq: mutable.Seq[A]): java.util.List[A]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated mutableSetAsJavaSet[A](s: mutable.Set[A]): java.util.Set[A]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated seqAsJavaList[A](seq: Seq[A]): java.util.List[A]
- Definition Classes
- WrapAsJava
-
implicit
def
deprecated setAsJavaSet[A](s: Set[A]): java.util.Set[A]
- Definition Classes
- WrapAsJava
-
final
def
eq(arg0: AnyRef): Boolean
Tests whether the argument (
that) is a reference to the receiver object (this).Tests whether the argument (
that) is a reference to the receiver object (this).The
eqmethod implements an equivalence relation on non-null instances ofAnyRef, and has three additional properties:- It is consistent: for any non-null instances
xandyof typeAnyRef, multiple invocations ofx.eq(y)consistently returnstrueor consistently returnsfalse. - For any non-null instance
xof typeAnyRef,x.eq(null)andnull.eq(x)returnsfalse. null.eq(null)returnstrue.
When overriding the
equalsorhashCodemethods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).- returns
trueif the argument is a reference to the receiver object;falseotherwise.
- Definition Classes
- AnyRef
- It is consistent: for any non-null instances
-
def
equals(arg0: Any): Boolean
The equality method for reference types.
-
def
finalize(): Unit
Called by the garbage collector on the receiver object when there are no more references to the object.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the
finalizemethod is invoked, as well as the interaction betweenfinalizeand non-local returns and exceptions, are all platform dependent. -
final
def
getClass(): Class[_]
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
-
def
hashCode(): Int
The hashCode method for reference types.
-
final
def
isInstanceOf[T0]: Boolean
Test whether the dynamic type of the receiver object is
T0.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 returnfalse, while the expressionList(1).isInstanceOf[List[String]]will returntrue. 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
mapAsJavaConcurrentMap[A, B](m: concurrent.Map[A, B]): ConcurrentMap[A, B]
Implicitly converts a Scala mutable
concurrent.Mapto a JavaConcurrentMap.Implicitly converts a Scala mutable
concurrent.Mapto a JavaConcurrentMap.The returned Java
ConcurrentMapis backed by the provided Scalaconcurrent.Mapand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
concurrent.Mapwas previously obtained from an implicit or explicit call ofmapAsScalaConcurrentMap(java.util.concurrent.ConcurrentMap)then the original Java ConcurrentMap will be returned.- m
The Scala
concurrent.Mapto be converted.- returns
A Java
ConcurrentMapview of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
implicit
def
mapAsJavaMap[A, B](m: Map[A, B]): java.util.Map[A, B]
Implicitly converts a Scala
Mapto a JavaMap.Implicitly converts a Scala
Mapto a JavaMap.The returned Java
Mapis backed by the provided ScalaMapand any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.If the Scala
Mapwas previously obtained from an implicit or explicit call ofasMap(java.util.Map)then the original JavaMapwill be returned.- m
The
Mapto be converted.- returns
A Java
Mapview of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
implicit
def
mutableMapAsJavaMap[A, B](m: mutable.Map[A, B]): java.util.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 Scala Map and any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.
If the Scala Map was previously obtained from an implicit or explicit call of
asMap(java.util.Map)then the original Java Map will be returned.- m
The Map to be converted.
- returns
A Java Map view of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
implicit
def
mutableSeqAsJavaList[A](seq: mutable.Seq[A]): java.util.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 Scala Seq and any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.
If the Scala Seq was previously obtained from an implicit or explicit call of
asSeq(java.util.List)then the original Java List will be returned.- seq
The Seq to be converted.
- returns
A Java List view of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
implicit
def
mutableSetAsJavaSet[A](s: mutable.Set[A]): java.util.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 Scala Set and any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.
If the Scala Set was previously obtained from an implicit or explicit call of
asSet(java.util.Set)then the original Java Set will be returned.- s
The Set to be converted.
- returns
A Java Set view of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
final
def
ne(arg0: AnyRef): Boolean
Equivalent to
!(this eq that).Equivalent to
!(this eq that).- returns
trueif the argument is not a reference to the receiver object;falseotherwise.
- Definition Classes
- AnyRef
-
final
def
notify(): Unit
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up a single thread that is waiting on the receiver object's monitor.
- Definition Classes
- AnyRef
- Note
not specified by SLS as a member of AnyRef
-
final
def
notifyAll(): Unit
Wakes up all threads that are waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
- Definition Classes
- AnyRef
- Note
not specified by SLS as a member of AnyRef
-
implicit
def
seqAsJavaList[A](seq: Seq[A]): java.util.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 Scala Seq and any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.
If the Scala Seq was previously obtained from an implicit or explicit call of
asSeq(java.util.List)then the original Java List will be returned.- seq
The Seq to be converted.
- returns
A Java List view of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
implicit
def
setAsJavaSet[A](s: Set[A]): java.util.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 Scala Set and any side-effects of using it via the Java interface will be visible via the Scala interface and vice versa.
If the Scala Set was previously obtained from an implicit or explicit call of asSet(java.util.Set) then the original Java Set will be returned.
- s
The Set to be converted.
- returns
A Java Set view of the argument.
- Definition Classes
- LowPriorityWrapAsJava
-
final
def
synchronized[T0](arg0: ⇒ T0): T0
- Definition Classes
- AnyRef
-
def
toString(): String
Creates a String representation of this object.
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
- returns
a String representation of the object.
- Definition Classes
- AnyRef → Any
-
final
def
wait(): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
wait(arg0: Long, arg1: Int): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
-
final
def
wait(arg0: Long): Unit
- Definition Classes
- AnyRef
- Annotations
- @throws( ... )
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like
Int,Float,ArrayorOptionwhich are accessible in all Scala compilation units without explicit qualification or imports.Notable packages include:
scala.collectionand its sub-packages contain Scala's collections frameworkscala.collection.immutable- Immutable, sequential data-structures such asVector,List,Range,HashMaporHashSetscala.collection.mutable- Mutable, sequential data-structures such asArrayBuffer,StringBuilder,HashMaporHashSetscala.collection.concurrent- Mutable, concurrent data-structures such asTrieMapscala.collection.parallel.immutable- Immutable, parallel data-structures such asParVector,ParRange,ParHashMaporParHashSetscala.collection.parallel.mutable- Mutable, parallel data-structures such asParArray,ParHashMap,ParTrieMaporParHashSetscala.concurrent- Primitives for concurrent programming such asFuturesandPromisesscala.io- Input and output operationsscala.math- Basic math functions and additional numeric types likeBigIntandBigDecimalscala.sys- Interaction with other processes and the operating systemscala.util.matching- Regular expressionsOther packages exist. See the complete list on the right.
Additional parts of the standard library are shipped as separate libraries. These include:
scala.reflect- Scala's reflection API (scala-reflect.jar)scala.xml- XML parsing, manipulation, and serialization (scala-xml.jar)scala.swing- A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)scala.util.parsing- Parser combinators, including an example implementation of a JSON parser (scala-parser-combinators.jar)Automatic imports
Identifiers in the scala package and the
scala.Predefobject are always in scope by default.Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example,
Listis an alias forscala.collection.immutable.List.Other aliases refer to classes provided by the underlying platform. For example, on the JVM,
Stringis an alias forjava.lang.String.