Question

6. Write an exception class that can be thrown when two negative numbers are passed to a method and write an ExceptionTest class to show that the exception class works. (5 pts)

1. Write an exception class that can be thrown when two negative numbers are passed to a method and write an ExceptionTest class to show that the exception class works. (5 pts)

Answer 1

ExceptionTest.java

// A Class that represents use-defined expception
class MyException extends Exception
{
   public MyException(String s)
   {
       // Call constructor of parent Exception
       super(s);
   }
}

// A Class that uses above MyException
public class ExceptionTest
{
static void add(int a,int b)
{
try
       {
   if(a<0&&b<0)
   {  
           // Throw an object of user defined exception
           throw new MyException("Both the parameters passed in this method are negative");
  
   }
   System.out.println(a+b);
       }
       catch (MyException ex)
       {
           System.out.println("Exception was caught");

           // Print the message from MyException object
           System.out.println(ex.getMessage());
       }
}
   // Driver Program
   public static void main(String args[])
   {
       add(-2,-5);
   }
}
Output:

Exception was caught
Both the parameters passed in this method are negative.