object Properties extends PropertiesTrait
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val
ScalaCompilerVersion: Name
Scala manifest attributes.
-
def
clearProp(name: String): String
- Definition Classes
- PropertiesTrait
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val
copyrightString: String
- Definition Classes
- PropertiesTrait
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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
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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
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def
envOrElse(name: String, alt: String): String
- Definition Classes
- PropertiesTrait
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def
envOrNone(name: String): Option[String]
- Definition Classes
- PropertiesTrait
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def
envOrSome(name: String, alt: Option[String]): Option[String]
- Definition Classes
- PropertiesTrait
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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
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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
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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
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def
javaClassPath: String
- Definition Classes
- PropertiesTrait
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def
javaHome: String
- Definition Classes
- PropertiesTrait
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def
javaSpecName: String
- Definition Classes
- PropertiesTrait
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def
javaSpecVendor: String
- Definition Classes
- PropertiesTrait
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def
javaSpecVersion: String
- Definition Classes
- PropertiesTrait
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def
javaVendor: String
- Definition Classes
- PropertiesTrait
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def
javaVersion: String
- Definition Classes
- PropertiesTrait
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def
javaVmInfo: String
- Definition Classes
- PropertiesTrait
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def
javaVmName: String
- Definition Classes
- PropertiesTrait
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def
javaVmVendor: String
- Definition Classes
- PropertiesTrait
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def
javaVmVersion: String
- Definition Classes
- PropertiesTrait
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def
jdkHome: String
- Definition Classes
- PropertiesTrait
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def
lineSeparator: String
The default end of line character.
The default end of line character.
- Definition Classes
- PropertiesTrait
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def
main(args: Array[String]): Unit
- Definition Classes
- PropertiesTrait
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def
osName: String
- Definition Classes
- PropertiesTrait
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def
propIsSet(name: String): Boolean
- Definition Classes
- PropertiesTrait
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def
propIsSetTo(name: String, value: String): Boolean
- Definition Classes
- PropertiesTrait
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def
propOrElse(name: String, alt: String): String
- Definition Classes
- PropertiesTrait
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def
propOrEmpty(name: String): String
- Definition Classes
- PropertiesTrait
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def
propOrFalse(name: String): Boolean
- Definition Classes
- PropertiesTrait
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def
propOrNone(name: String): Option[String]
- Definition Classes
- PropertiesTrait
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def
propOrNull(name: String): String
- Definition Classes
- PropertiesTrait
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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
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def
scalaCmd: String
- Definition Classes
- PropertiesTrait
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def
scalaHome: String
- Definition Classes
- PropertiesTrait
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def
scalaPropOrElse(name: String, alt: String): String
- Definition Classes
- PropertiesTrait
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def
scalaPropOrEmpty(name: String): String
- Definition Classes
- PropertiesTrait
-
def
scalaPropOrNone(name: String): Option[String]
- Definition Classes
- PropertiesTrait
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def
scalacCmd: String
- Definition Classes
- PropertiesTrait
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def
setProp(name: String, value: String): String
- Definition Classes
- PropertiesTrait
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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
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def
sourceReader: String
- Definition Classes
- PropertiesTrait
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def
tmpDir: String
- Definition Classes
- PropertiesTrait
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def
userDir: String
- Definition Classes
- PropertiesTrait
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def
userHome: String
- Definition Classes
- PropertiesTrait
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def
userName: String
- Definition Classes
- PropertiesTrait
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def
versionMsg: String
- Definition Classes
- PropertiesTrait
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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
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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.collection.parallel.immutable
- Immutable, parallel data-structures such asParVector
,ParRange
,ParHashMap
orParHashSet
scala.collection.parallel.mutable
- Mutable, parallel data-structures such asParArray
,ParHashMap
,ParTrieMap
orParHashSet
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.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.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
.