Scala2.11.7学习笔记API说明

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This is the documentation for the Scala standard library.

Package structure

The scala package contains core types like Int, Float, Arrayor 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
  • such as ParArray,  ParHashMap,  ParTrieMap or  ParHashSet
  • scala.collection.immutable - Immutable, sequential data-structures
  • scala.collection.mutable - Mutable, sequential data-structures
  • scala.collection.concurrent - Mutable, concurrent data-structures
  • scala.collection.parallel.immutable - Immutable, parallel
      data-structures
  • scala.collection.parallel.mutable - Mutable, parallel 
    data-structures
  • such as      ParVector,  ParRange,  ParHashMap or  ParHashSet
  • such as      TrieMap
  • such as      ArrayBuffer,  StringBuilder,  HashMap or HashSet
  • such as      Vector, List,  Range, HashMap or  HashSet
• 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

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.continuations - Delimited continuations using continuation-passing-style
     (scala-continuations-library.jar, scala-continuations-plugin.jar)
• scala.util.parsing - Parser combinators, including an
     example implementation of a JSON parser (scala-parser-combinators.jar)
• scala.actors    - Actor-based concurrency (deprecated and replaced by Akka actors,
     scala-actors.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 for java.lang.String.