Best Groovy Programming Books to Buy in December 2025
Groovy in Action: Covers Groovy 2.4
Programming Groovy 2: Dynamic Productivity for the Java Developer (Pragmatic Programmers)
Groovy Programming: An Introduction for Java Developers
Making Java Groovy
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Groovy in Action
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Modern Programming Made Easy: Using Java, Scala, Groovy, and JavaScript
Programming Groovy: Dynamic Productivity for the Java Developer (The Pragmatic Programmers)
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Groovy Recipes: Greasing the Wheels of Java
Groovy: Grundlagen und fortgeschrittene Techniken (German Edition)
No Static: A Guide to Creative Radio Programming
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To concatenate a string and a variable into a variable in Groovy, you can use the plus (+) operator. Simply place the variables and strings within quotes and use the plus operator to combine them together. For example, if you have a variable named "name" with a value of "John" and you want to concatenate it with a string "Hello, ", you can do so by writing "Hello, " + name. This will result in a new variable that contains the concatenated string "Hello, John".
How to concatenate special characters with a string and variable in Groovy?
You can concatenate special characters with a string and variable in Groovy using the following syntax:
def specialChar = "@" def str = "Hello, world!" def concatenatedString = str + specialChar + "Groovy"
In this example, the special character "@" is concatenated with the string "Groovy" using the "+" operator. The resulting concatenatedString will be "Hello, world!@Groovy".
How to concatenate a string and regex variable in Groovy?
You can concatenate a string and a regex variable in Groovy by simply using the + operator. Here is an example:
def regex = ~/[0-9]+/ def str = "The number is "
def concat = str + regex println concat
Output:
The number is /[0-9]+/
In this example, the string variable str is concatenated with the regex variable regex using the + operator. The result is stored in the concat variable and then printed.
What is the benefit of using Groovy's string interpolation for concatenation?
One of the benefits of using Groovy's string interpolation for concatenation is that it provides a more concise and easy-to-read way of combining strings. Instead of using the more verbose "+" operator to concatenate strings, Groovy allows you to directly embed variables, expressions, and method calls within double-quoted strings using the ${} syntax. This can make your code cleaner and more readable, as well as reduce the chances of making syntax errors when combining strings. Additionally, using string interpolation can also improve performance compared to using traditional string concatenation techniques, especially for larger strings or in loops.
How to concatenate a string and dynamic variable reference in Groovy?
In Groovy, you can concatenate a string and a dynamic variable reference using the "${}" syntax.
Here's an example:
def name = "Alice" def age = 30
def output = "Hello, ${name}! You are ${age} years old."
println output
In this example, the ${name} and ${age} within the string will be replaced with the values of the variables name and age at runtime. The resulting output will be:
Hello, Alice! You are 30 years old.