The Groovy 2 Tutorial

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An introductory text for new Groovy developers

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Introduction2 chapters

Begin part
  1. Introduction

  2. Legal Notices

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I Getting started11 chapters

Begin part
  1. 1. Introduction

  2. 2. Installing Groovy

  3. 3. Your first lines of Groovy

  4. 4. Running a script

  5. 5. Compiling Groovy

  6. 6. Comments

  7. 7. Statements

  8. 8. The assert statement

  9. 9. Reserved Words

  10. 10. Packages

  11. 11. Grape

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II Variables11 chapters

Begin part
  1. 12. Introduction

  2. 13. Declaring Variables

  3. 14. Objects

  4. 15. Booleans

  5. 16. Numbers

  6. 17. Strings

  7. 18. Collections

  8. 19. Arrays

  9. 20. Ranges

  10. 21. Regular Expressions

  11. 22. Data types

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III Operators16 chapters

Begin part
  1. 23. Introduction

  2. 24. Operator Overloading

  3. 25. Numeric Operators

  4. 26. Simple Assignment Operator

  5. 27. The Complement Operator

  6. 28. Equality Operators

  7. 29. Arithmetic operators

  8. 30. Relational Operators

  9. 31. Increment and Decrement Operators

  10. 32. Conditional Operators

  11. 33. Bitwise Operators

  12. 34. Compound Assignment Operators

  13. 35. String Operators

  14. 36. Regular Expression Operators

  15. 37. Collection operators

  16. 38. Object Operators

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IV Control Flow Statements7 chapters

Begin part
  1. 39. Introduction

  2. 40. Blocks

  3. 41. The if Statement

  4. 42. The switch Statement

  5. 43. The for Loop

  6. 44. The while loop

  7. 45. Branching statements

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V Exceptions8 chapters

Begin part
  1. 46. Introduction

  2. 47. Common Exceptions

  3. 48. Anatomy of an Exception

  4. 49. Try-Catch-Finally

  5. 50. How Much Should We try?

  6. 51. Causing an Exception

  7. 52. Catching Errors

  8. 53. Methods and Exceptions

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VI Methods10 chapters

Begin part
  1. 54. Introduction

  2. 55. The Basics

  3. 56. Parameters

  4. 57. Default Values for Parameters

  5. 58. Named Arguments

  6. 59. Variable Arguments (Varargs)

  7. 60. Return value

  8. 61. Throwing an exception

  9. 62. Documenting a method

  10. 63. Techniques

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VII Closures8 chapters

Begin part
  1. 64. Introduction

  2. 65. Introducing Closures

  3. 66. Parameters

  4. 67. Returning Values

  5. 68. Closures as Method Parameters

  6. 69. Loops and closures

  7. 70. Useful Methods That Use Closures

  8. 71. Closure scope

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VIII Object-oriented programming14 chapters

Begin part
  1. 72. Introduction

  2. 73. Expando

  3. 74. The basics of OO

  4. 75. Properties and Fields

  5. 76. Getters and Setters

  6. 77. Methods

  7. 78. Constructors

  8. 79. Class Methods and Variables

  9. 80. Final Variables

  10. 81. Access Modifiers

  11. 82. Useful Annotations

  12. 83. Let Go of That Instance!

  13. 84. Enums

  14. 85. The synchronized modifier

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IX More object-oriented programming22 chapters

Begin part
  1. 86. Introduction

  2. 87. Organising your code

  3. 88. Naming your packages

  4. 89. Packages and directory structure

  5. 90. The Shapes demo - packages

  6. 91. Interfaces

  7. 92. Referring to objects by their interface

  8. 93. General advice for interfaces

  9. 94. The Shapes demo - Interfaces

  10. 95. Traits

  11. 96. Trait properties and fields

  12. 97. Trait methods

  13. 98. Trait static members

  14. 99. The class-trait relationship

  15. 100. Traits and interfaces

  16. 101. Implementing multiple traits

  17. 102. The Shapes demo - Traits

  18. 103. Inheritance

  19. 104. Subclassing

  20. 105. Final Classes and Methods

  21. 106. Abstract classes

  22. 107. The Shapes demo - Inheritance

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X Going further4 chapters

Begin part
  1. 108. Other Topics

  2. 109. The great beyond

  3. Appendix: The Shapes demo code listing

  4. Colophon