Groovy Recipes: Greasing the Wheels of Java (Pragmatic by Scott Davis

By Scott Davis

Even if you are new to Groovy or you are an skilled Groovy programmer, Groovy Recipes, is a must-have reference publication. Groovy Recipes, is sweet at giving a uncomplicated rationalization on Groovy middle suggestions. yet, its genuine energy is in supplying a plethora of examples, that continue you coming again to this booklet, repeatedly, to profit the straightforward beauty of writing Groovy code. no matter if you are an skilled Java or Groovy programmer, you will want this ebook on your programming instrument field. I usually reference Chapters 6,7 and eight, "File Tricks," "Parsing XML" and "Writing XML," respectively. The final chapters of the publication, which disguise Grails, are okay, if you would like a basic knowing of what Grails is and the way to take advantage of it. besides the fact that, if Grails is your larger curiosity, there are greater books that you will need to have in your shelf to reference (e.g. Groovy and Grails Recipes and The Definitive consultant to Grails).Bottom line, if Groovy is your basic programming language, this is often a good booklet to have on your arsenal.

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Groovy, and you are ready to run. ) Groovy is a superset of Java. It is in no way meant to replace Java. In fact, Groovy would not exist without Java. Groovy is meant to be a better Java than Java, while all along supporting your legacy codebase. But Groovy does more than improve the existing language. Groovy introduces new classes such as Closure, Range, and GString. Groovy introduces the concept of safe dereferencing to avoid lengthy null-checking blocks. Groovy offers heredocs—a new special multiline String variable.

Click New Remote Site. 3. Type Groovy in the Name field. 4. org/groovy/distributions/update/ in the URL field, and click OK. 37 G ROOVY + I NTELLI J IDEA 5. Check the Groovy repository, and click Finish. 6. Select Groovy under Select Features to Install, and click Next. 7. Read the agreement, and click Next. 8. Set the default location, and click Finish. 9. If you get a warning about the plug-in being unsigned, don’t worry. Click Install. Restart Eclipse, and you should be ready to use Groovy. Starting a New Groovy Project To start a new Groovy project, follow these steps: 1.

10, Evaluating a String, on page 95. Binding. getVariable("s") behind the scenes. Variables declared with a datatype (String s = "Jane") don’t get stored in the Binding, so they can’t be found the next time you ask for them. 4, Discovering the Methods of a Class, on page 188. length() ... You can use the Groovy shell to quickly discover all the methods on a given class. For example, let’s say you want to see all the String methods. The previous example does the trick. The nice thing about asking a class directly for its methods is that it is always up-to-date—Javadocs, on the other hand, can easily get out of sync with the live code.

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