Test your Regix exprestion in easy way

During our work you have to write regex expression and test it

and it's confusing and consuming a lot of times

I found this useful website that help in

java.lang.ClassNotFoundException: during Running Tomcat Server

Hi Dears,

we usuulay found the errors like Class not found Exception while we are running the server .

and this exception drive as carazy especially becase we are imported all the classes and sound clear for us.

For Example: 

• java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener

How to Add new Server (Tomcat )in Eclipse

Hi Dears,

there is the simple way to add new server in Eclipse and I will try to add more steps later on to cover multiple Ideas of adding new server



1) The Simple way :

Finding duplicate values in a SQL table

Today I tried to find all the duplicate data in specific column in the table

below is the simple query to find it out.

how to Unlock DB - Oracle XE DB

If the Error Number ORA-28000 has happen ,  and account is locked 

Problem in importing excel with date/ timestamp field using oracle sql-developer

I tried to upload file in excel file to the sqldeveloper and faced problem date is null or invalid format


below is the steps how to solve it