Day 1: Overview of Groovy

Groovy is an object-oriented programming language specifically created to be compatible with the Java Virtual Machine (JVM). This implies that it possesses exceptional interoperability with your current Java programs and libraries. Groovy places a high emphasis on a syntax and features that are easy for developers to work with, allowing for dynamic and expressive code.

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Key Advantages:

Concise Syntax

Groovy enables the expression of equivalent reasoning with a reduced number of lines of code in comparison to Java, hence enhancing productivity.

Let us use the following example to gain a better understanding: Assume you have a list of names and you want to greet each person.

import java.util.List;
import java.util.Arrays;
class HelloWorld {
    public static void main(String[] args) {
        List<String> names = Arrays.asList("Alice", "Bob", "Charlie");

        for (String name : names) {
            System.out.println("Hello, " + name + "!");
        }
    }
}

def names = ["Alice", "Bob", "Charlie"]
names.each { name -> println "Hello, $name!" }

Hello, Alice!
Hello, Bob!
Hello, Charlie!

Default Imports

All of the following packages and classes are pre-imported; therefore, no explicit import statement is required to utilize them.

java.io.*
java.lang.*
java.math.BigDecimal
java.math.BigInteger
java.net.*
java.util.*
groovy.lang.*
groovy.util.*

Supports Static and Dynamic variable declaration