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How to Check Datatype in Scala?
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How to check String is null in Scala?

Last Updated : 26 Mar, 2024
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In this article, we will learn how to check if a string is null in Scala. In Scala, you can check if a string is null using the following methods:

Table of Content

  • 1. Using the == operator:
  • 2. Using the eq method (recommended):
  • 3. Using Pattern Matching:

1. Using the == operator:

Scala 
object Main {     def main(args: Array[String]) {         val str: String = null         if (str == null) {           println("String is null")         } else {           println("String is not null")         }     } }

Output:

String is null

2. Using the eq method (recommended):

The eq method is a null-safe way of comparing objects in Scala. It returns true if both operands are null, or if the operands point to the same object instance.

Scala 
object Main {     def main(args: Array[String]) {         val str: String = null         if (str eq null) {           println("String is null")         } else {           println("String is not null")         }     } }

Output:

String is null

3. Using Pattern Matching:

Scala 
object Main {     def main(args: Array[String]) {         val str: String = null         str match {           case null => println("String is null")           case _    => println("String is not null")         }     } }

Output:

String is null

It's generally recommended to use the eq method or pattern matching for checking null references, as they provide a more concise way of handling null values in Scala.


Next Article
How to Check Datatype in Scala?

M
mdshoaibansari0307
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Article Tags :
  • Scala

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