Java Exception handling

# Exception handling:

Exception handling is the process of responding to the occurrence, during computation, of exceptions – anomalous or exceptional conditions requiring special processing – often changing the normal flow of program execution.

Where we use Exception??

 ..... 
         int a=20;
         int b=0;
         int c=a/b;
         System.out.println(c);
                                        ..............

..................
                 String s=null;
                 System.out.println(s.length());
                                                       .......................

• The Mathematical will never allow the value dividing by zero, For such a situation Exception is used to throws the error
•  The String is set as null, here NullPointerException will resolved by Exception handling.

Example:

public class Exception_Example

  {

     public static void main(String args[])

        {

            int a=20;

            int b=0;

               try

                  {

                      int c=a/b;

                      System.out.println(c);

                    } catch(ArithmeticException error)

                          {

                              System.out.println("Exception:" +error);

                           }
               System.out.println("Rest of the code will be executed");
            }
    }

Output:


Exception:java.lang.ArithmeticException: / by zero
Rest of the code
 

How does it works??  

sathishkumar blogspot - Exceptional Handling