Libraries import in Groovy

To import libraries in Groovy, you can use the import keyword followed by the fully qualified name of the package or class. Here is an example of how to import the java.util package and use the ArrayList class:

import java.util.ArrayList
def list = new ArrayList()

list.add("apple")

list.add("banana")

list.add("orange")
println(list)

In the above code block, the import statement is used to import the java.util.ArrayList class. The def keyword is used to define a variable list, which is then initialized with a new instance of ArrayList. The add method is used to add three elements to the list, and println is used to print the contents of the list.

You can also use the * wildcard character to import all classes in a package. Here is an example of how to import all classes in the java.util package:

import java.util.*
def set = new HashSet()

set.add("dog")

set.add("cat")

set.add("bird")
println(set)

In the above code block, the import statement is used to import all classes in the java.util package with the * wildcard character. The def keyword is used to define a variable set, which is then initialized with a new instance of HashSet. The add method is used to add three elements to the set, and println is used to print the contents of the set.