webservices pdf link

WebService_PDF download by click on the link

Exception Handling interview questions

1. Create custom exception

class MyOwnException extends Exception {
   public MyOwnException(String msg){
      super(msg);
   }
}

class CustomExceptionTest {
   static void  employeeAge(int age) throws MyOwnException{
      if(age < 0)
         throw new MyOwnException("Age can't be less than zero");
      else
         System.out.println("Input is valid!!");
   }
   public static void main(String[] args) {
       try {
            employeeAge(-2);
       }
       catch (MyOwnException e) {
            e.printStackTrace();
       }
   }
}
--------------------------------------------------------------------------------
MyOwnException: Age can't be less than zero
at EmployeeTest.employeeAge(EmployeeTest.java:10)
at EmployeeTest.main(EmployeeTest.java:16)

--------------------------------------------------------------------------------

2. Return statement
//Finally block overrides the value returned by try and catch blocks.

public class returnStatement {

public static String returnMethod(){
try {
return "try";
} catch (Exception e) {
return "catch";
}finally{
return "finally";
}
}
public static void main(String[] args) {
System.out.println(returnStatement.returnMethod());
}

}
-------------------------------------------------------------------------
finally
-------------------------------------------------------------------------

3. When the finally block doesn't execute, following are the circumstances 
1.When we place System.exit() in our code for stopping the jvm.
2.Abnormal situations like H/w problems.
3. finally block raises exception.