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Scala program to demonstrate the throws keyword

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YasminRadwan26
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2022-07-09
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Here, we will demonstrate the throws keyword. The throws keyword is defined with method definition. It provides information to the caller function that this method may throw this exception.

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YasminRadwan26
2022-07-09
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Program/Source Code:

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

// Scala program to demonstrate the
// "throws" keyword

object Sample {
  @throws(classOf[ArithmeticException])
  def divide(num1: Int, num2: Int): Int = {
    return (num2 / num1);
  }
  // Main method
  def main(args: Array[String]) {
    var num1: Int = 2;
    var num2: Int = 10;
    var res: Int = 0;

    try {
      res = divide(num1, num2);
      printf("Result: %d\n", res);
    } catch {
      case e: ArithmeticException => println(e);
    } finally {
      println("Finally block executed")
    }
  }
}

Output:

Result: 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.

Here, we defined a method divide() with the throws keyword. The throws keyword is defined with method definition. It provides information to the caller function that this method may throw this exception.

In the main() function, we created three integer variables num1, num2, res, that are initialized with 2, 10, 0. Then we defined the try and catch block and called the divide() method in the try block. After that, the finally block gets executed and then printed "Finally block executed" message on the console screen.

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