How to use java library in Scala?

As Scala and Java are meant to work together effortlessly, using Java libraries in Scala programming is a breeze. To utilize a Java library in Scala, follow these steps:

1. Importing Java Classes: Use Scala’s import statement to import the required Java classes or packages.
2. Creating Java Objects: Use Scala’s new keyword to create Java objects in the same way as you would in Java.
3. Calling Java Methods: Use Java objects’ methods in the same way as you would in Java.
4. Managing Java Exceptions: Use Scala’s try-catch blocks and other exception-handling techniques to manage Java exceptions.
5. Using Java Collections: Scala supports the direct usage of Java collections. Interoperability is straightforward using Scala’s handy syntax for dealing with Java collections.

This is a basic example showing how to use a Java library in Scala:

Scala

import java.util.{ArrayList, Collections}

object Main {
  def main(args: Array[String]): Unit = {
    
    // Creating an ArrayList of Strings 
    // using Java library
    val list = new ArrayList[String]()
    list.add("Scala")
    list.add("Java")
    list.add("Python")

    // Sorting the ArrayList using 
    // Java library
    Collections.sort(list)

    // Printing the sorted list
    println("Sorted List:")
    list.forEach(println)
  }
}

The ArrayList and Collections Java classes are imported into this Scala code, which then builds an ArrayList of strings, adds items to it, sorts the list using Java’s Collections.sort() function, and outputs the sorted list.

Output: