Groovy Programming : An Introduction for Java Developers

Groovy Programming is an introduction to the Java-based scripting language Groovy. Groovy has much in common with popular scripting languages such as Perl, Python, and Ruby, but is written in a Java-like syntax. And, unlike these other languages, Groovy is sanctioned by the Java community for use on the Java platform. Since it is based on Java, applications written in Groovy can make full use of the Java Application Programmer Interfaces (APIs). This means Groovy can integrate seamlessly with applications written in Java, while avoiding the complexities of the full Java language. This bare-bones structure also means Groovy can be used as an introduction to Java and to programming in general. Its simpler constructions and modern origins make it ideal as a first language and for introducing principles such as object-oriented programming. This book introduces all the major aspects of Groovy development and emphasizes Groovy's potential as a learning tool. Case studies and exercises are included, along with numerous programming examples. The book begins assuming only a general familiarity with Java programming, and progresses to discuss advanced topics such as GUI builders, Groovlets, Unit Testing, and Groovy SQL. * The first comprehensive book on Groovy programming that shows how writing applications and scripts for the Java platform is fast and easy * Written by leading software engineers and acclaimed computing instructors * Offers numerous programming examples, code samples, detailed case studies, exercises for self-study, and a companion website with a Windows-based Groovy editor Contents......Page 8 Foreword......Page 15 Preface......Page 17 About the authors......Page 20 why scripting?......Page 22 why groovy?......Page 24 numbers and expressions......Page 26 expressions......Page 27 operator precedence......Page 29 assignment......Page 30 increment and decrement operators......Page 31 object references......Page 32 relational and equality operators......Page 33 exercises......Page 35 string literals......Page 38 string indexing and slicing......Page 39 string methods......Page 40 regular expressions......Page 44 exercises......Page 46 lists......Page 48 list methods......Page 50 maps......Page 52 map methods......Page 54 ranges......Page 55 exercises......Page 56 simple output......Page 60 formatted output......Page 62 simple input......Page 63 exercises......Page 66 iteration 1: specification and list implementation......Page 68 iteration 2: map implementation......Page 71 exercises......Page 73 methods......Page 74 default parameters......Page 77 method return values......Page 78 parameter passing......Page 80 scope......Page 82 collections as method parameters and return values......Page 83 exercises......Page 84 while statement......Page 88 for statement......Page 90 if statement......Page 92 switch statement......Page 95 break statement......Page 99 continue statement......Page 100 exercises......Page 101 closures......Page 106 closures, collections, and strings......Page 111 other closure features......Page 117 exercises......Page 121 command line arguments......Page 124 file class......Page 125 exercises......Page 132 iteration 1: specification and map implementation......Page 134 11.2 iteration 2: implementation of a text-based user interface......Page 140 iteration 3: implementation with closures......Page 143 exercises......Page 146 classes......Page 148 composition......Page 156 exercises......Page 158 specification......Page 160 iteration 1: an initial model......Page 161 iteration 2: augment the model......Page 163 iteration 3: reinstate the user interface......Page 168 exercises......Page 174 inheritance......Page 178 inherited methods......Page 181 redefined methods......Page 183 polymorphism......Page 184 the abstract class......Page 187 the interface class......Page 190 exercises......Page 194 unit testing......Page 200 the groovytestcase and junit testcase classes......Page 202 the groovytestsuite and junit testsuite classes......Page 207 the role of unit testing......Page 210 exercises......Page 214 specification......Page 216 iteration 1: confirm the polymorphic effect......Page 217 iteration 2: demonstrate the required functionality......Page 220 iteration 3: provide user feedback......Page 225 iteration 4: enforce constraints......Page 233 exercises......Page 238 simple queries......Page 240 relations......Page 242 17.3 database updates......Page 245 objects from tables......Page 249 inheritance......Page 251 the spring framework......Page 253 exercises......Page 258 iteration 1: persist the domain model......Page 260 iteration 2: the impact of persistence......Page 272 exercises......Page 279 groovy markup......Page 280 markupbuilder......Page 282 xml parsing......Page 285 exercises......Page 297 swingbuilder......Page 298 lists and tables......Page 307 box and boxlayout classes......Page 313 exercises......Page 315 strings......Page 318 templates......Page 319 exercises......Page 323 iteration 1: prototype the gui......Page 324 iteration 2: implement the handlers......Page 327 exercises......Page 334 servlets......Page 336 groovlets......Page 337 gsp pages......Page 345 exercises......Page 349 iteration 1: web implementation......Page 350 exercise......Page 354 epilogue......Page 356 the java development kit......Page 358 the derby/cloudscape database......Page 359 the textbook sources......Page 360 simple and elegant......Page 362 methods......Page 364 classes......Page 365 polymorphism......Page 366 closures......Page 367 exceptions......Page 368 classes......Page 370 operator associativity......Page 371 variable definitions......Page 372 logical operators......Page 374 conditional operator......Page 375 conversions......Page 376 testing......Page 379 regular expressions......Page 382 single character match......Page 383 match zero or more......Page 384 match number......Page 385 character classes......Page 386 miscellaneous notations......Page 387 grouping......Page 388 Appendix E - more on lists, maps, and ranges......Page 390 classes......Page 391 lists......Page 392 the spread operator......Page 393 testing......Page 394 formatted output......Page 397 console class......Page 400 recursive methods......Page 403 static typing......Page 405 actual parameter agreement......Page 407 default parameter ambiguity......Page 408 collections as method parameters and return values......Page 410 closures and ambiguity......Page 414 closures and methods......Page 415 closures and scope......Page 416 recursive closures......Page 417 static typing......Page 418 closures, collections, and ranges......Page 419 return statement......Page 421 testing......Page 422 properties and visibility......Page 425 object navigation......Page 430 static members......Page 434 operator overloading......Page 436 the invokemethod......Page 438 exercises......Page 440 Appendix J - advanced closures......Page 441 simple closures......Page 442 partial application......Page 444 composition......Page 446 patterns of computation......Page 447 business rules......Page 449 packaging......Page 453 list reduction......Page 460 exercises......Page 462 antbuilder......Page 466 specialized builders......Page 474 menus and toolbars......Page 479 dialogs......Page 486 bibliography......Page 490 index......Page 492 Groovy Programming is an introduction to the Java-based scripting language Groovy. Groovy has much in common with popular scripting languages such as Perl, Python, and Ruby, but is written in a Java-like syntax. And, unlike these other languages, Groovy is sanctioned by the Java community for use on the Java platform. Since it is based on Java, applications written in Groovy can make full use of the Java Application Programmer Interfaces (APIs). This means Groovy can integrate seamlessly with applications written in Java, while avoiding the complexities of the full Java language. This bare-bones structure also means Groovy can be used as an introduction to Java and to programming in general. Its simpler constructions and modern origins make it ideal as a first language and for introducing principles such as object-oriented programming.
This book introduces all the major aspects of Groovy development and emphasizes Groovy's potential as a learning tool. Case studies and exercises are included, along with numerous programming examples. The book begins assuming only a general familiarity with Java programming, and progresses to discuss advanced topics such as GUI builders, Groovlets, Unit Testing, and Groovy SQL.

• The first comprehensive book on Groovy programming that shows how writing applications and scripts for the Java platform is fast and easy
• Written by leading software engineers and acclaimed computing instructors
• Offers numerous programming examples, code samples, detailed case studies, exercises for self-study, and a companion website with a Windows-based Groovy editor

Groovy Programming is an introduction to the Java-based scripting language Groovy. Groovy has much in common with popular scripting languages such as Perl, Python, and Ruby, but is written in a Java-like syntax. And, unlike these other languages, Groovy is sanctioned by the Java community for use on the Java platform. Since it is based on Java, applications written in Groovy can make full use of the Java Application Programmer Interfaces (APIs). This means Groovy can integrate seamlessly with applications written in Java, while avoiding the complexities of the full Java language. This bare-bones structure also means Groovy can be used as an introduction to Java and to programming in general. Its simpler constructions and modern origins make it ideal as a first language and for introducing principles such as object-oriented programming.
This book introduces all the major aspects of Groovy development and emphasizes Groovy's potential as a learning tool. Case studies and exercises are included, along with numerous programming examples. The book begins assuming only a general familiarity with Java programming, and progresses to discuss advanced topics such as GUI builders, Groovlets, Unit Testing, and Groovy SQL.

* The first comprehensive book on Groovy programming that shows how writing applications and scripts for the Java platform is fast and easy

* Written by leading software engineers and acclaimed computing instructors

* Offers numerous programming examples, code samples, detailed case studies, exercises for self-study, and a companion website with a Windows-based Groovy editor One of the first guides to the new, easy-to-use scripting language Groovy **Groovy Programming** is an introduction to the Java-based scripting language Groovy. Groovy has much in common with popular scripting languages such as Perl, Python, and Ruby, but is written in a Java-like syntax. And, unlike these other languages, Groovy is sanctioned by the Java community for use on the Java platform. Since it is based on Java, applications written in Groovy can make full use of the Java Application Programmer Interfaces (APIs). This means Groovy can integrate seamlessly with applications written in Java, while avoiding the complexities of the full Java language. This bare-bones structure also means Groovy can be used as an introduction to Java and to programming in general. Its simpler constructions and modern origins make it ideal as a first language and for introducing principles such as object-oriented programming.This book introduces all the major aspects of Groovy...