How to Interpolate String In Groovy?

7 minutes read

In Groovy, you can interpolate strings by using the double quotes (" ") instead of single quotes (' '). When you use double quotes, Groovy allows you to embed variables and expressions directly inside the string using the ${} syntax. This makes it easy to build dynamic strings without having to concatenate multiple parts together. For example:


def name = "Alice" def age = 30


def message = "Hello, my name is ${name} and I am ${age} years old."


In the above code snippet, the variables name and age are interpolated inside the string message using the ${} syntax. When you print the message variable, it will display "Hello, my name is Alice and I am 30 years old."

Best Groovy Books to Read of May 2024

1
Groovy in Action: Covers Groovy 2.4

Rating is 5 out of 5

Groovy in Action: Covers Groovy 2.4

2
Groovy Programming: An Introduction for Java Developers

Rating is 4.9 out of 5

Groovy Programming: An Introduction for Java Developers

3
Programming Groovy: Dynamic Productivity for the Java Developer (Pragmatic Programmers)

Rating is 4.8 out of 5

Programming Groovy: Dynamic Productivity for the Java Developer (Pragmatic Programmers)

4
Programming Groovy 2: Dynamic Productivity for the Java Developer (Pragmatic Programmers)

Rating is 4.7 out of 5

Programming Groovy 2: Dynamic Productivity for the Java Developer (Pragmatic Programmers)

5
Mastering GROOVY: A Comprehensive Guide To Learn Groovy Programming

Rating is 4.6 out of 5

Mastering GROOVY: A Comprehensive Guide To Learn Groovy Programming

6
Making Java Groovy

Rating is 4.5 out of 5

Making Java Groovy

7
Mastering Groovy Programming: Essential Techniques

Rating is 4.4 out of 5

Mastering Groovy Programming: Essential Techniques

8
Learning Groovy 3: Java-Based Dynamic Scripting

Rating is 4.3 out of 5

Learning Groovy 3: Java-Based Dynamic Scripting

9
Groovy 2 Cookbook

Rating is 4.2 out of 5

Groovy 2 Cookbook


What is the alternative to string interpolation in Groovy?

The alternative to string interpolation in Groovy is using the GString class. GString is a special type of string that allows for dynamic content injection using expressions enclosed within ${}. GStrings offer more flexibility compared to traditional string interpolation by allowing for the evaluation of complex expressions and method calls within a string.


What is the significance of placeholders in Groovy string interpolation?

Placeholders in Groovy string interpolation are useful for dynamically inserting values into strings. They allow for cleaner and more readable code by separating the variable names from the actual string content. Placeholders also help prevent errors and make it easier to update values in the future without having to modify the entire string. Additionally, placeholders make it easier to inject values safely without risking injection attacks, as they inherently escape or sanitize the input.


How to interpolate a string with mathematical operations in Groovy?

In Groovy, you can interpolate a string with mathematical operations by using double quotes and embedding the operations within ${}.


Here is an example:

1
2
3
4
5
def x = 10
def y = 5

def result = "${x} + ${y} = ${x + y}"
println(result)


This will output:

1
10 + 5 = 15


You can perform any mathematical operation inside the ${} including addition, subtraction, multiplication, and division.

Facebook Twitter LinkedIn Telegram Whatsapp Pocket

Related Posts:

The Groovy GDK (Groovy Development Kit) provides a set of convenience methods and enhancements to the standard Java libraries. To use the Groovy GDK, you need to import the GDK classes into your Groovy script or application.You can import the GDK classes by us...
To work with JSON/XML in Groovy, you can use the built-in classes provided by Groovy. For JSON handling, you can use JsonSlurper to parse JSON data into a Groovy data structure (e.g., maps and lists) and JsonOutput to serialize a Groovy data structure into JSO...
To add quotes to a Java string, you can use the escape character "" to indicate that the quote should be included as part of the string itself. Here are a few examples:Adding double quotes to a string: String str1 = "This is a "quoted" stri...