Exception Handling in Selenium - Examples to Practice

Exception Handling:

There are 2 types of exceptions

Usually, exceptions are classified as problems that happens during execution

i. Compile time exceptions
ii. Runtime exceptions

i. Compile time Exceptions: These are 2 types:
a.Syntax errors:
Exp: String a; (Correct)
Stng a; (Incorrect)

b.Semantic errors
Variables may declared twice
Exp: int a; (Once Correct)
----
----
int a; (Twice incorrect)

NOTE:  By Default these are highlighted in red in Eclipse while writing the script


ii.Runtime exceptions:

These are interruptions that happens during program execution time.
A good program should handle all the exceptions and continue with its
normal flow of program execution.

Exception Handle is a set of code that handles an exception
Exceptions can be handled in Java using "try & catch" block of code

Sytanx:{for- try & catch}

try{
        statement(s)
      }
      catch (Exception exception_name){
        statement(s)
      }

NOTE: The "finally" block is executed irrespective of an exception being raised in
  the try block.

It is optional to use with a try block

Syntax: {try & catch with finally}
try{
      statement(s)
      }
      catch(Exception Exception_name){
        statement(s)
      }
      finally{
        statement(s)
      }


Exp:
Scanner sc=new Scanner(System.in);
System.out.println("please enter the value:");
  int b=sc.nextInt();

try{
int a=10;
        int c=a/b;
        System.out.println(c);
}catch(Exception e)
{
System.out.println("dont pass b value as:"+b);
//e.printStackTrace();//it notifys the exception location
}
finally{
System.out.println("SampleSelenium");
}

Exp:

  try {
  int a=10;
  int b=0;
  //int b=2; (switch between two b values to get different outcome)
  int c=a/b;
  System.out.println(c);
  }
  catch (Exception x){
  System.out.println("b-value should not be zero");
  System.out.print(x);
  }
  finally{
  System.out.print("This is an Example of an exception Handling");
  }