July 2017
Intermediate to advanced
796 pages
18h 55m
English
Content preview from Scala and Spark for Big Data Analytics
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Packages and package objects
Just like Java, a package is a special container or object which contains/defines a set of objects, classes, and even packages. Every Scala file has the following automatically imported:
- java.lang._
- scala._
- scala.Predef._
The following is an example for basic imports:
// import only one member of a packageimport java.io.File// Import all members in a specific packageimport java.io._// Import many members in a single import statementimport java.io.{File, IOException, FileNotFoundException}// Import many members in a multiple import statementimport java.io.Fileimport java.io.FileNotFoundExceptionimport java.io.IOException
You can even rename a member while importing, and that's to avoid a collision between packages ...
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