trait AsScalaConverters extends AnyRef
Defines converter methods from Java to Scala collections. These methods are available through the scala.jdk.javaapi.CollectionConverters object.
- Source
- AsScalaConverters.scala
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- By Inheritance
- AsScalaConverters
- AnyRef
- Any
- by any2stringadd
- by StringFormat
- by Ensuring
- by ArrowAssoc
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- Public
- Protected
Value Members
- final def !=(arg0: Any): Boolean
Test two objects for inequality.
Test two objects for inequality.
- returns
trueif !(this == that), false otherwise.
- Definition Classes
- AnyRef → Any
- final def ##: Int
Equivalent to
x.hashCodeexcept for boxed numeric types andnull.Equivalent to
x.hashCodeexcept for boxed numeric types andnull. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. Fornullreturns a hashcode wherenull.hashCodethrows aNullPointerException.- returns
a hash value consistent with ==
- Definition Classes
- AnyRef → Any
- def +(other: String): String
- Implicit
- This member is added by an implicit conversion from AsScalaConverters toany2stringadd[AsScalaConverters] performed by method any2stringadd in scala.Predef.
- Definition Classes
- any2stringadd
- def ->[B](y: B): (AsScalaConverters, B)
- Implicit
- This member is added by an implicit conversion from AsScalaConverters toArrowAssoc[AsScalaConverters] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
- Annotations
- @inline()
- final def ==(arg0: Any): Boolean
The expression
x == thatis equivalent toif (x eq null) that eq null else x.equals(that).The expression
x == thatis equivalent toif (x eq null) that eq null else x.equals(that).- returns
trueif the receiver object is equivalent to the argument;falseotherwise.
- Definition Classes
- AnyRef → Any
- final def asInstanceOf[T0]: T0
Cast the receiver object to be of type
T0.Cast the receiver object to be of type
T0.Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression
1.asInstanceOf[String]will throw aClassCastExceptionat runtime, while the expressionList(1).asInstanceOf[List[String]]will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.- returns
the receiver object.
- Definition Classes
- Any
- Exceptions thrown
ClassCastExceptionif the receiver object is not an instance of the erasure of typeT0.
- def asScala(p: Properties): mutable.Map[String, String]
Converts a Java
Propertiesto a Scala mutableMap[String, String].Converts a Java
Propertiesto a Scala mutableMap[String, String].The returned Scala
Map[String, String]is backed by the provided JavaPropertiesand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.- p
The Java
Propertiesto be converted.- returns
A Scala mutable
Map[String, String]view of the argument.
- def asScala[A, B](d: Dictionary[A, B]): mutable.Map[A, B]
Converts a Java
Dictionaryto a Scala mutableMap.Converts a Java
Dictionaryto a Scala mutableMap.The returned Scala
Mapis backed by the provided JavaDictionaryand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Dictionarywas previously obtained from an implicit or explicit call ofasJavaDictionarythen the original ScalaMapwill be returned.- d
The Java
Dictionaryto be converted.- returns
A Scala mutable
Mapview of the argument.
- def asScala[A, B](m: ConcurrentMap[A, B]): concurrent.Map[A, B]
Converts a Java
ConcurrentMapto a Scala mutableConcurrentMap.Converts a Java
ConcurrentMapto a Scala mutableConcurrentMap.The returned Scala
ConcurrentMapis backed by the provided JavaConcurrentMapand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
ConcurrentMapwas previously obtained from an implicit or explicit call ofasJavathen the original ScalaConcurrentMapwill be returned.- m
The Java
ConcurrentMapto be converted.- returns
A Scala mutable
ConcurrentMapview of the argument.
- def asScala[A, B](m: java.util.Map[A, B]): mutable.Map[A, B]
Converts a Java
Mapto a Scala mutableMap.Converts a Java
Mapto a Scala mutableMap.The returned Scala
Mapis backed by the provided JavaMapand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Mapwas previously obtained from an implicit or explicit call ofasJavathen the original ScalaMapwill be returned.If the wrapped map is synchronized (e.g. from
java.util.Collections.synchronizedMap), it is your responsibility to wrap all non-atomic operations withunderlying.synchronized. This includesget, asjava.util.Map's API does not allow for an atomicgetwhennullvalues may be present.- m
The Java
Mapto be converted.- returns
A Scala mutable
Mapview of the argument.
- def asScala[A](s: java.util.Set[A]): mutable.Set[A]
Converts a Java
Setto a Scala mutableSet.Converts a Java
Setto a Scala mutableSet.The returned Scala
Setis backed by the provided JavaSetand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Setwas previously obtained from an implicit or explicit call ofasJavathen the original ScalaSetwill be returned.- s
The Java
Setto be converted.- returns
A Scala mutable
Setview of the argument.
- def asScala[A](l: java.util.List[A]): Buffer[A]
Converts a Java
Listto a Scala mutableBuffer.Converts a Java
Listto a Scala mutableBuffer.The returned Scala
Bufferis backed by the provided JavaListand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Listwas previously obtained from an implicit or explicit call ofasJavathen the original ScalaBufferwill be returned.- l
The Java
Listto be converted.- returns
A Scala mutable
Bufferview of the argument.
- def asScala[A](c: Collection[A]): Iterable[A]
Converts a Java
Collectionto a ScalaIterable.Converts a Java
Collectionto a ScalaIterable.If the Java
Collectionwas previously obtained from an implicit or explicit call ofasJavaCollectionthen the original ScalaIterablewill be returned.- c
The Java
Collectionto be converted.- returns
A Scala
Iterableview of the argument.
- def asScala[A](i: java.lang.Iterable[A]): Iterable[A]
Converts a Java
Iterableto a ScalaIterable.Converts a Java
Iterableto a ScalaIterable.The returned Scala
Iterableis backed by the provided JavaIterableand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Iterablewas previously obtained from an implicit or explicit call ofasJavathen the original ScalaIterablewill be returned.- i
The Java
Iterableto be converted.- returns
A Scala
Iterableview of the argument.
- def asScala[A](e: java.util.Enumeration[A]): Iterator[A]
Converts a Java
Enumerationto a ScalaIterator.Converts a Java
Enumerationto a ScalaIterator.The returned Scala
Iteratoris backed by the provided JavaEnumerationand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Enumerationwas previously obtained from an implicit or explicit call ofasJavaEnumerationthen the original ScalaIteratorwill be returned.- e
The Java
Enumerationto be converted.- returns
A Scala
Iteratorview of the argument.
- def asScala[A](i: java.util.Iterator[A]): Iterator[A]
Converts a Java
Iteratorto a ScalaIterator.Converts a Java
Iteratorto a ScalaIterator.The returned Scala
Iteratoris backed by the provided JavaIteratorand any side-effects of using it via the Scala interface will be visible via the Java interface and vice versa.If the Java
Iteratorwas previously obtained from an implicit or explicit call ofasJavathen the original ScalaIteratorwill be returned.- i
The Java
Iteratorto be converted.- returns
A Scala
Iteratorview of the argument.
- def clone(): AnyRef
Create a copy of the receiver object.
Create a copy of the receiver object.
The default implementation of the
clonemethod is platform dependent.- returns
a copy of the receiver object.
- def ensuring(cond: (AsScalaConverters) => Boolean, msg: => Any): AsScalaConverters
- Implicit
- This member is added by an implicit conversion from AsScalaConverters toEnsuring[AsScalaConverters] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: (AsScalaConverters) => Boolean): AsScalaConverters
- Implicit
- This member is added by an implicit conversion from AsScalaConverters toEnsuring[AsScalaConverters] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: Boolean, msg: => Any): AsScalaConverters
- Implicit
- This member is added by an implicit conversion from AsScalaConverters toEnsuring[AsScalaConverters] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- def ensuring(cond: Boolean): AsScalaConverters
- Implicit
- This member is added by an implicit conversion from AsScalaConverters toEnsuring[AsScalaConverters] performed by method Ensuring in scala.Predef.
- Definition Classes
- Ensuring
- final def eq(arg0: AnyRef): Boolean
Tests whether the argument (
that) is a reference to the receiver object (this).Tests whether the argument (
that) is a reference to the receiver object (this).The
eqmethod implements an equivalence relation on non-null instances ofAnyRef, and has three additional properties:- It is consistent: for any non-null instances
xandyof typeAnyRef, multiple invocations ofx.eq(y)consistently returnstrueor consistently returnsfalse. - For any non-null instance
xof typeAnyRef,x.eq(null)andnull.eq(x)returnsfalse. null.eq(null)returnstrue.
When overriding the
equalsorhashCodemethods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).- returns
trueif the argument is a reference to the receiver object;falseotherwise.
- Definition Classes
- AnyRef
- It is consistent: for any non-null instances
- def equals(arg0: AnyRef): Boolean
The equality method for reference types.
- def finalize(): Unit
Called by the garbage collector on the receiver object when there are no more references to the object.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the
finalizemethod is invoked, as well as the interaction betweenfinalizeand non-local returns and exceptions, are all platform dependent.- Attributes
- protected[lang]
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.Throwable])
- Note
not specified by SLS as a member of AnyRef
- final def getClass(): Class[_ <: AnyRef]
Returns the runtime class representation of the object.
- def hashCode(): Int
The hashCode method for reference types.
- final def isInstanceOf[T0]: Boolean
Test whether the dynamic type of the receiver object has the same erasure as
T0.Test whether the dynamic type of the receiver object has the same erasure as
T0.Depending on what
T0is, the test is done in one of the below ways:T0is a non-parameterized class type, e.g.BigDecimal: this method returnstrueif the value of the receiver object is aBigDecimalor a subtype ofBigDecimal.T0is a parameterized class type, e.g.List[Int]: this method returnstrueif the value of the receiver object is someList[X]for anyX. For example,List(1, 2, 3).isInstanceOf[List[String]]will return true.T0is some singleton typex.typeor literalx: this method returnsthis.eq(x). For example,x.isInstanceOf[1]is equivalent tox.eq(1)T0is an intersectionX with YorX & Y: this method is equivalent tox.isInstanceOf[X] && x.isInstanceOf[Y]T0is a unionX | Y: this method is equivalent tox.isInstanceOf[X] || x.isInstanceOf[Y]T0is a type parameter or an abstract type member: this method is equivalent toisInstanceOf[U]whereUisT0's upper bound,AnyifT0is unbounded. For example,x.isInstanceOf[A]whereAis an unbounded type parameter will return true for any value ofx.
This is exactly equivalent to the type pattern
_: T0- returns
trueif the receiver object is an instance of erasure of typeT0;falseotherwise.
- Definition Classes
- Any
- Note
due to the unexpectedness of
List(1, 2, 3).isInstanceOf[List[String]]returning true andx.isInstanceOf[A]whereAis a type parameter or abstract member returning true, these forms issue a warning.
- final def ne(arg0: AnyRef): Boolean
Equivalent to
!(this eq that).Equivalent to
!(this eq that).- returns
trueif the argument is not a reference to the receiver object;falseotherwise.
- Definition Classes
- AnyRef
- final def notify(): Unit
Wakes up a single thread that is waiting on the receiver object's monitor.
Wakes up a single thread that is waiting on the receiver object's monitor.
- Definition Classes
- AnyRef
- Annotations
- @native()
- Note
not specified by SLS as a member of AnyRef
- final def notifyAll(): Unit
Wakes up all threads that are waiting on the receiver object's monitor.
Wakes up all threads that are waiting on the receiver object's monitor.
- Definition Classes
- AnyRef
- Annotations
- @native()
- Note
not specified by SLS as a member of AnyRef
- final def synchronized[T0](arg0: => T0): T0
Executes the code in
bodywith an exclusive lock onthis.Executes the code in
bodywith an exclusive lock onthis.- returns
the result of
body
- Definition Classes
- AnyRef
- def toString(): String
Creates a String representation of this object.
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
- returns
a String representation of the object.
- Definition Classes
- AnyRef → Any
- final def wait(): Unit
See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--.
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- Note
not specified by SLS as a member of AnyRef
- final def wait(arg0: Long, arg1: Int): Unit
See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-
- Definition Classes
- AnyRef
- Annotations
- @throws(classOf[java.lang.InterruptedException])
- Note
not specified by SLS as a member of AnyRef
- final def wait(arg0: Long): Unit
See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-.
Deprecated Value Members
- def formatted(fmtstr: String): String
Returns string formatted according to given
formatstring.Returns string formatted according to given
formatstring. Format strings are as forString.format(@see java.lang.String.format).- Implicit
- This member is added by an implicit conversion from AsScalaConverters toStringFormat[AsScalaConverters] performed by method StringFormat in scala.Predef.
- Definition Classes
- StringFormat
- Annotations
- @deprecated @inline()
- Deprecated
(Since version 2.12.16) Use
formatString.format(value)instead ofvalue.formatted(formatString), or use thef""string interpolator. In Java 15 and later,formattedresolves to the new method in String which has reversed parameters.
- def →[B](y: B): (AsScalaConverters, B)
- Implicit
- This member is added by an implicit conversion from AsScalaConverters toArrowAssoc[AsScalaConverters] performed by method ArrowAssoc in scala.Predef.
- Definition Classes
- ArrowAssoc
- Annotations
- @deprecated
- Deprecated
(Since version 2.13.0) Use
->instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like
Int,Float,ArrayorOptionwhich are accessible in all Scala compilation units without explicit qualification or imports.Notable packages include:
scala.collectionand its sub-packages contain Scala's collections frameworkscala.collection.immutable- Immutable, sequential data-structures such asVector,List,Range,HashMaporHashSetscala.collection.mutable- Mutable, sequential data-structures such asArrayBuffer,StringBuilder,HashMaporHashSetscala.collection.concurrent- Mutable, concurrent data-structures such asTrieMapscala.concurrent- Primitives for concurrent programming such asFuturesandPromisesscala.io- Input and output operationsscala.math- Basic math functions and additional numeric types likeBigIntandBigDecimalscala.sys- Interaction with other processes and the operating systemscala.util.matching- Regular expressionsOther packages exist. See the complete list on the right.
Additional parts of the standard library are shipped as separate libraries. These include:
scala.reflect- Scala's reflection API (scala-reflect.jar)scala.xml- XML parsing, manipulation, and serialization (scala-xml.jar)scala.collection.parallel- Parallel collections (scala-parallel-collections.jar)scala.util.parsing- Parser combinators (scala-parser-combinators.jar)scala.swing- A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)Automatic imports
Identifiers in the scala package and the
scala.Predefobject are always in scope by default.Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example,
Listis an alias forscala.collection.immutable.List.Other aliases refer to classes provided by the underlying platform. For example, on the JVM,
Stringis an alias forjava.lang.String.