How to create runtime exception

 Java   exception  are  two types 

     1.  Runtime Exceptions   or  Unchecked  Exception

      2. Compile time Exception  or   Checked Exception

        This  example  explain  how to create  own  own unchecked  exception . This  code

        verifies  the customer  id  type of  validation . If  id  is   greater then  expected  then it generate

        exception .   How  check the code .

package Exceptions;

public class   Customer{

private   String    name ;

private    int   id;

public Customer() {}

public Customer(int id2) {

// TODO Auto-generated constructor stub

System.out.println(" Id is :"+id);

}

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

}

package Exceptions;

public class NameNotFoundException extends Exception{

        /**

* @author Mukesh

*/

        private static final long serialVersionUID = 1L;

public NameNotFoundException(String message) {

        System.out.print(message);

    }

}

package Exceptions;

public  class CreateOwnExceptions {

    public Customer findById(int id) throws NameNotFoundException {

    

    

    if ( id >= 10000) {

            throw new NameNotFoundException(" Invaild customer id");

        }

        return new Customer( id);

    }  

    

    

    

       public static void main(String[] args) {

    CreateOwnExceptions obj = new CreateOwnExceptions();

        try {

           

            obj.findById(20000);

           

        } catch (NameNotFoundException e) {

            e.printStackTrace();

        }

    }

      

    

}

      

Program   output ..

 Invaild customer idExceptions.NameNotFoundException

at Exceptions.CreateOwnExceptions.findById(CreateOwnExceptions.java:17)

at Exceptions.CreateOwnExceptions.main(CreateOwnExceptions.java:33)