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Scala program to demonstrate the throw keyword

belongs to collection: Scala Exception Handling Programs

YasminRadwan26
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2022-07-09
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Here, we will demonstrate the throw keyword. The throw keyword is used to generate an exception manually with a specified message.

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YasminRadwan26
2022-07-09
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Program/Source Code:

The source code to demonstrate the throw keyword is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to demonstrate the throw keyword

object Sample {
  // Main method
  def main(args: Array[String]) {
    var num1: Int = 0;
    var num2: Int = 10;
    var res: Int = 0;

    try {
      if (num1 == 0)
        throw new ArithmeticException("Divide by zero exception")
      else
        res = num2 / num1;

      printf("Result: %d", res);
    } catch {
      case e: Throwable => println(e);
    } finally {
      println("Finally block executed")
    }
  }
}

Output:

Array elements: 
1 2 3 4 5 
Finally block executed

Explanation:

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

In the main() function, we created three integer variables num1, num2, res, that are initialized with 0, 10, 0. Then we checked the condition to handle divide by zero exception, if the value of variable num1 is 0 then it will throw an exception with the specified message. The generated exception is caught in the catch block. After that, the finally block gets executed and then printed "Finally block executed" message on the console screen.

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