Best Groovy Programming Books to Buy in October 2025
Groovy in Action: Covers Groovy 2.4
Programming Groovy 2: Dynamic Productivity for the Java Developer (Pragmatic Programmers)
Groovy in Action
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Making Java Groovy
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Modern Programming Made Easy: Using Java, Scala, Groovy, and JavaScript
The C Programming Language
Groovy Programming: An Introduction for Java Developers
In Groovy, "${p: ...}" is a way to access or reference a variable in a string interpolation. The variable 'p' can be any valid Groovy expression or variable that you want to include in the string. By using ${p: ...} within a string, Groovy will evaluate the expression or variable and substitute its value in the final string output. This allows for dynamic content to be included within a string without the need for concatenation or formatting functions.
What is the purpose of MetaClass in Groovy?
In Groovy, a MetaClass is used to dynamically modify the behavior of classes at runtime. It allows developers to add or change methods, properties, and behavior of existing classes without modifying their source code. MetaClasses are a powerful tool for creating flexible and customizable classes in Groovy, enabling developers to add new functionality or alter existing behavior based on specific application requirements.
What is the meaning of @Category annotation in Groovy?
The @Category annotation in Groovy is used to add new methods or properties to existing classes without modifying the source code of those classes. This allows developers to extend the functionality of a class without subclassing it or modifying its source code directly. Categories in Groovy are similar to extension methods in other programming languages.
What is the purpose of the @Mixin annotation in Groovy?
The @Mixin annotation in Groovy is used to add methods and properties from one class (the mixin) to another class. This allows developers to effectively combine functionality from multiple classes without needing to use traditional inheritance, which can sometimes lead to issues like the diamond problem. Mixins can be very useful for adding additional behavior to classes that are not directly related through inheritance.