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Scala program to check nullable string

Here, we are going to learn how to check nullable string in Scala programming language?
Submitted by Nidhi, on May 25, 2021 [Last updated : March 10, 2023]

Scala – Check Nullable String

Here, we will create strings using the StringBuilder class and then we will check a string contains the null value or not.

Scala code to check nullable string

The source code to check the nullable string is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to check nullable string

object Sample {
  def main(args: Array[String]) {
    val str1 = new StringBuilder("");
    val str2: String = null;

    if (str1 == null)
      println("string 'str1' contains null value");
    else
      println("string 'str1' does not contains null value");

    if (str2 == null)
      println("string 'str2' contains null value");
    else
      println("string 'str2' does not contains null value");

  }
}

Output

string 'str1' does not contains null value
string 'str2' contains null value

Explanation

In the above program, we used an object-oriented approach to create the program. And, we created an object Sample. Here, we defined main() function. The main() function is the entry point for the program.

In the main() function, we created two immutable strings str1, str2 using StringBuilder class. Then we checked string contains a "null" value or not. Then printed the appropriate message on the console screen.

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