Learn Java for Web Development

APPENDIX B: Introduction to Groovy 419 Passing a Closure as a Parameter A closure is an object. You can pass closures around jus ...

420 APPENDIX B: Introduction to Groovy Listing B-36 illustrates using the Java ternary and Elvis operators in Groovy. Listing B- ...

APPENDIX B: Introduction to Groovy 421 Field Operator Groovy provides a way to bypass the getter and access the underlying field ...

422 APPENDIX B: Introduction to Groovy This example creates a list of names and iterates through the list to print out the names ...

423 Appendix C Introduction to Scala Scala seamlessly integrates object-oriented and functional programming. Scala is a statical ...

424 APPENDIX C: Introduction to Scala From the command line, enter the following to open the interactive interpreter, shown in F ...

APPENDIX C: Introduction to Scala 425 Note The semicolon at the end of a statement is usually optional.  Line 1: The main() m ...

426 APPENDIX C: Introduction to Scala Variables Scala allows you to decide whether a variable is immutable (read-only) when you ...

APPENDIX C: Introduction to Scala 427 operations that simulate additions, removals, or updates, but those operations will in eac ...

428 APPENDIX C: Introduction to Scala Sets A set is a collection that contains no duplicate elements. There are two kinds of set ...

APPENDIX C: Introduction to Scala 429 Classes Classes in Scala are declared very much like Java classes. One difference is that ...

430 APPENDIX C: Introduction to Scala Save Listing C-12 in the file vehicle.scala and compile it using the following: scalac ve ...

APPENDIX C: Introduction to Scala 431 Traits Say you want to add another class to your vehicle hierarchy. This time you want to ...

432 APPENDIX C: Introduction to Scala scala> val vehicleList = List(vehicle1, vehicle2, vehicle3) vehicleList: List[Vehicle] ...

APPENDIX C: Introduction to Scala 433 val vehicle2 = new Bike(100) val vehicle3 = new Batmobile(300) val vehicleList = List(v ...

■ A Action, Struts 2, 164 Action interface, 165 ActionSupport class, 166 Antipatterns, 158 Arithmetic operators, 110–111 Arrays, ...

struts 2-core dependency, 186 struts.xml, 187 successful login, 184 welcome file, 186 MVC architecture, 89 accessing jsp model, ...

Core tag library, 129–130 conditionals functional area, 135 action, 136–137 action, 135–136 action, 137 general-purpose actio ...

helper, 156 sequence diagram, 157 view helper, 151–152 Diamond operator (<>), 422 DispatcherServlet, 228 Dispatcher view p ...

Front controller pattern advantages, 149 centralized access mechanism, 149 class diagram, 150 controller component, 150 dispatch ...