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Table of Content Scala Tutorial ........................................................................... 2 Audience .................................................................................. 2 Prerequisites ............................................................................ 2 Copyright & Disclaimer Notice .................................................. 2 Scala Overview ........................................................................ 8 Scala is object-oriented: ............................................................................ 8 Scala is functional: ..................................................................................... 8 Scala is statically typed: ............................................................................ 8 Scala runs on the JVM: ............................................................................. 8 Scala can Execute Java Code: .................................................................. 9 Scala vs Java: ........................................................................................... 9 Scala Web Frameworks: ........................................................................... 9 Scala Environment Setup ....................................................... 10 Installing Scala on Windows: ................................................................... 10 STEP (1): JAVA SETUP: ......................................................................... 10 STEP (2): SCALA SETUP: ..................................................................... 10 Installing Scala on Mac OS X and Linux .................................................. 11 STEP (1): JAVA SETUP: ........................................................................ 11 STEP (2): SCALA SETUP: ..................................................................... 11 Scala Basic Syntax ................................................................ 13 First Scala Program: ................................................................................ 13 INTERACTIVE MODE PROGRAMMING: ............................................... 13 SCRIPT MODE PROGRAMMING: .......................................................... 13 Basic Syntax: ........................................................................................... 14 Scala Identifiers: ...................................................................................... 15 ALPHANUMERIC IDENTIFIERS ............................................................. 15 OPERATOR IDENTIFIERS ..................................................................... 15 MIXED IDENTIFIERS .............................................................................. 15 LITERAL IDENTIFIERS ........................................................................... 15 Scala Keywords: ...................................................................................... 15 Comments in Scala ................................................................................. 16 Blank Lines and Whitespace: .................................................................. 16 Newline Characters: ................................................................................ 16 Scala Packages: ...................................................................................... 16 Scala Data Types ................................................................... 18 Scala Basic Literals: ................................................................................ 18 INTEGER LITERALS .............................................................................. 19 TUTORIALS POINT Simply Easy Learning
FLOATING POINT LITERALS ................................................................ 19 BOOLEAN LITERALS............................................................................. 19 SYMBOL LITERALS ............................................................................... 19 CHARACTER LITERALS........................................................................ 19 STRING LITERALS ................................................................................ 19 MULTI-LINE STRINGS ........................................................................... 19 THE NULL VALUE .................................................................................. 20 ESCAPE SEQUENCES: ......................................................................... 20 Scala Variables ...................................................................... 21 Variable Declaration ................................................................................ 21 Variable Data Types: ............................................................................... 21 Variable Type Inference: ......................................................................... 22 Multiple assignments: .............................................................................. 22 Variable Types: ........................................................................................ 22 FIELDS: ................................................................................................... 22 METHOD PARAMETERS: ...................................................................... 22 LOCAL VARIABLES: ............................................................................... 22 Scala Access Modifiers .......................................................... 23 Private members: .................................................................................... 23 Protected members: ................................................................................ 23 Public members: ...................................................................................... 24 Scope of protection: ................................................................................. 24 Scala Operators ..................................................................... 25 Arithmetic Operators: ............................................................................... 25 Example: ................................................................................................. 25 Relational Operators: ............................................................................... 26 Example: ................................................................................................. 27 Logical Operators: ................................................................................... 27 Example: ................................................................................................. 27 Bitwise Operators: ................................................................................... 28 Example .................................................................................................. 29 Assignment Operators: ............................................................................ 30 Example: ................................................................................................. 30 Operator Precedence in Scala: ................................................................ 31 Scala IF…ELSE Statements .................................................. 33 The if Statement: ..................................................................................... 33 SYNTAX: ................................................................................................. 33 EXAMPLE:............................................................................................... 34 The if...else Statement: ............................................................................ 34 TUTORIALS POINT Simply Easy Learning
Page 1 and 2: Scala Tutorial
Page 3: ABOUT THE TUTORIAL Scala Tutorial S
Page 7 and 8: Scala Strings .....................
Page 9 and 10: CHAPTER 1 Scala Overview Scala, sho
Page 11 and 12: CHAPTER 2 Scala Environment Setup T
Page 13 and 14: $scala -version Scala code runner v
Page 15 and 16: } * This will print 'Hello World' a
Page 17 and 18: forSome If implicit import Lazy Mat
Page 19 and 20: CHAPTER 4 Scala Data Types Scala ha
Page 21 and 22: Characters must not necessarily be
Page 23 and 24: Variable Type Inference: When you a
Page 25 and 26: The access to f in class Sub is OK
Page 27 and 28: var a = 10; var b = 20; var c = 25;
Page 29 and 30: } } println("a && b = " + (a&&b) );
Page 31 and 32: a >>> 15 C:/> Assignment Operators:
Page 33 and 34: Here, operators with the highest pr
Page 35 and 36: } If the boolean expression evaluat
Page 37 and 38: Nested if...else Statement: It is a
Page 39 and 40: while loop do...while loop for loop
Page 41 and 42: Flow Diagram: Example: object Test
Page 43 and 44: When the above code is compiled and
Page 45 and 46: } } // for loop execution with mult
Page 47 and 48: Flow Diagram: Example: import scala
Page 49 and 50: Infinite Loop: A loop becomes infin
Page 51 and 52: } } return sum A function, which do
Page 53 and 54: When the above code is compiled and
Page 55 and 56:
} When the above code is compiled a
Page 57 and 58:
} logWithDateBound("message1" ) log
Page 59 and 60:
CHAPTER 12 Scala Strings Consider t
Page 61 and 62:
} } var str2 = "Tod"; println("Dot
Page 63 and 64:
23 24 25 26 27 28 29 30 31 32 33 34
Page 65 and 66:
CHAPTER 13 Scala Arrays Scala provi
Page 67 and 68:
C:/> Multi-Dimensional Arrays: Ther
Page 69 and 70:
C:/> Scala Arrays Methods: Followin
Page 71 and 72:
Scala Lists Scala Lists are quite s
Page 73 and 74:
Creating Uniform Lists: You can use
Page 75 and 76:
13 14 15 16 17 18 19 20 21 22 23 24
Page 77 and 78:
var s = Set(1,3,5,7) While defining
Page 79 and 80:
C:/> Scala Set Methods: Following a
Page 81 and 82:
elements. 38 39 40 41 42 43 44 45 4
Page 83 and 84:
use two maps with ++ as method colo
Page 85 and 86:
11 12 13 14 15 16 17 18 19 20 21 22
Page 87 and 88:
val t = new Tuple3(1, "hello", Cons
Page 89 and 90:
The method will return Some[Person]
Page 91 and 92:
6 7 8 9 10 11 12 13 14 def filter(p
Page 93 and 94:
Scala Iterator Methods: Following a
Page 95 and 96:
38 39 40 41 42 43 44 45 46 47 48 49
Page 97 and 98:
CHAPTER 15 Scala Classes & Objects
Page 99 and 100:
} } println ("Point y location : "
Page 101 and 102:
CHAPTER 16 Scala Traits A trait enc
Page 103 and 104:
CHAPTER 17 Scala Pattern Matching P
Page 105 and 106:
} // case class, empty one. case cl
Page 107 and 108:
} When the above code is compiled a
Page 109 and 110:
[0-9] Match any digit; same as [012
Page 111 and 112:
CHAPTER 19 Scala Exception Handling
Page 113 and 114:
CHAPTER 20 Scala Extractors An extr
Page 115 and 116:
CHAPTER 21 Scala Files I/O Scala is
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