object Properties extends PropertiesTrait
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- val ScalaCompilerVersion: Name
Scala manifest attributes.
- def clearProp(name: String): String
- Definition Classes
- PropertiesTrait
- val copyrightString: String
- Definition Classes
- PropertiesTrait
- val developmentVersion: Option[String]
The development Scala version, if this is not a final release.
The development Scala version, if this is not a final release. The precise contents are not guaranteed, but it aims to provide a unique repository identifier (currently the svn revision) in the fourth dotted segment if the running version was built from source.
- returns
Some(version) if this is a non-final version, None if this is a final release or the version cannot be read.
- Definition Classes
- PropertiesTrait
- def encodingString: String
This is the default text encoding, overridden (unreliably) with
JAVA_OPTS="-Dfile.encoding=Foo"
This is the default text encoding, overridden (unreliably) with
JAVA_OPTS="-Dfile.encoding=Foo"
- Definition Classes
- PropertiesTrait
- def envOrElse(name: String, alt: => String): String
- Definition Classes
- PropertiesTrait
- def envOrNone(name: String): Option[String]
- Definition Classes
- PropertiesTrait
- def envOrSome(name: String, alt: => Option[String]): Option[String]
- Definition Classes
- PropertiesTrait
- def isJavaAtLeast(version: Int): Boolean
Compares the given specification version to the major version of the platform.
Compares the given specification version to the major version of the platform.
- version
a specification major version number
- Definition Classes
- PropertiesTrait
- def isJavaAtLeast(version: String): Boolean
Compares the given specification version to the specification version of the platform.
Compares the given specification version to the specification version of the platform.
- version
a specification version number (legacy forms acceptable)
- returns
true
if the specification version of the current runtime is equal to or higher than the version denoted by the given string.
- Definition Classes
- PropertiesTrait
// In this example, the runtime's Java specification is assumed to be at version 8. isJavaAtLeast("1.8") // true isJavaAtLeast("8") // true isJavaAtLeast("9") // false isJavaAtLeast("9.1") // false isJavaAtLeast("1.9") // throws
- Exceptions thrown
NumberFormatException
if the given string is not a version string
Example: - def isLinux: Boolean
Returns
true
iff the underlying operating system is a Linux distribution.Returns
true
iff the underlying operating system is a Linux distribution.- Definition Classes
- PropertiesTrait
- def isMac: Boolean
Returns
true
iff the underlying operating system is a version of Apple Mac OSX.Returns
true
iff the underlying operating system is a version of Apple Mac OSX.- Definition Classes
- PropertiesTrait
- def isWin: Boolean
Returns
true
iff the underlying operating system is a version of Microsoft Windows.Returns
true
iff the underlying operating system is a version of Microsoft Windows.- Definition Classes
- PropertiesTrait
- def javaClassPath: String
- Definition Classes
- PropertiesTrait
- def javaHome: String
- Definition Classes
- PropertiesTrait
- def javaSpecName: String
- Definition Classes
- PropertiesTrait
- def javaSpecVendor: String
- Definition Classes
- PropertiesTrait
- def javaSpecVersion: String
- Definition Classes
- PropertiesTrait
- def javaVendor: String
- Definition Classes
- PropertiesTrait
- def javaVersion: String
- Definition Classes
- PropertiesTrait
- def javaVmInfo: String
- Definition Classes
- PropertiesTrait
- def javaVmName: String
- Definition Classes
- PropertiesTrait
- def javaVmVendor: String
- Definition Classes
- PropertiesTrait
- def javaVmVersion: String
- Definition Classes
- PropertiesTrait
- def jdkHome: String
- Definition Classes
- PropertiesTrait
- def lineSeparator: String
The default end of line character.
The default end of line character.
- Definition Classes
- PropertiesTrait
- def main(args: Array[String]): Unit
- Definition Classes
- PropertiesTrait
- def osName: String
- Definition Classes
- PropertiesTrait
- def propIsSet(name: String): Boolean
- Definition Classes
- PropertiesTrait
- def propIsSetTo(name: String, value: String): Boolean
- Definition Classes
- PropertiesTrait
- def propOrElse(name: String, alt: => String): String
- Definition Classes
- PropertiesTrait
- def propOrEmpty(name: String): String
- Definition Classes
- PropertiesTrait
- def propOrFalse(name: String): Boolean
- Definition Classes
- PropertiesTrait
- def propOrNone(name: String): Option[String]
- Definition Classes
- PropertiesTrait
- def propOrNull(name: String): String
- Definition Classes
- PropertiesTrait
- val releaseVersion: Option[String]
The numeric portion of the runtime Scala version, if this is a final release.
The numeric portion of the runtime Scala version, if this is a final release. If for instance the versionString says "version 2.9.0.final", this would return Some("2.9.0").
- returns
Some(version) if this is a final release build, None if it is an RC, Beta, etc. or was built from source, or if the version cannot be read.
- Definition Classes
- PropertiesTrait
- def scalaCmd: String
- Definition Classes
- PropertiesTrait
- def scalaHome: String
- Definition Classes
- PropertiesTrait
- def scalaPropOrElse(name: String, alt: => String): String
- Definition Classes
- PropertiesTrait
- def scalaPropOrEmpty(name: String): String
- Definition Classes
- PropertiesTrait
- def scalaPropOrNone(name: String): Option[String]
- Definition Classes
- PropertiesTrait
- def scalacCmd: String
- Definition Classes
- PropertiesTrait
- def setProp(name: String, value: String): String
- Definition Classes
- PropertiesTrait
- def sourceEncoding: String
This is the encoding to use reading in source files, overridden with -encoding.
This is the encoding to use reading in source files, overridden with -encoding. Note that it uses "prop" i.e. looks in the scala jar, not the system properties.
- Definition Classes
- PropertiesTrait
- def sourceReader: String
- Definition Classes
- PropertiesTrait
- def tmpDir: String
- Definition Classes
- PropertiesTrait
- def userDir: String
- Definition Classes
- PropertiesTrait
- def userHome: String
- Definition Classes
- PropertiesTrait
- def userName: String
- Definition Classes
- PropertiesTrait
- def versionMsg: String
- Definition Classes
- PropertiesTrait
- def versionNumberString: String
Either the development or release version if known, otherwise the empty string.
Either the development or release version if known, otherwise the empty string.
- Definition Classes
- PropertiesTrait
- val versionString: String
The version number of the jar this was loaded from plus "version " prefix, or "version (unknown)" if it cannot be determined.
The version number of the jar this was loaded from plus "version " prefix, or "version (unknown)" if it cannot be determined.
- Definition Classes
- PropertiesTrait
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like
Int
,Float
,Array
orOption
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 frameworkscala.collection.immutable
- Immutable, sequential data-structures such asVector
,List
,Range
,HashMap
orHashSet
scala.collection.mutable
- Mutable, sequential data-structures such asArrayBuffer
,StringBuilder
,HashMap
orHashSet
scala.collection.concurrent
- Mutable, concurrent data-structures such asTrieMap
scala.concurrent
- Primitives for concurrent programming such asFutures
andPromises
scala.io
- Input and output operationsscala.math
- Basic math functions and additional numeric types likeBigInt
andBigDecimal
scala.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.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 forscala.collection.immutable.List
.Other aliases refer to classes provided by the underlying platform. For example, on the JVM,
String
is an alias forjava.lang.String
.