Java ADF connecting to a Data Base

When you open Oracle JDeveloper Studio you will be prompted to the following screen

Select Connect to a Data Base

Select 'Create a Data Base Connection'

Give a name to your connection

Select the connection  type you use. Here we are using a MySql Data Base

Type the username and the password and give the Data Base name. Then
test the connection and press 'Ok' , if the connection is unsuccessful
check the username, password and the Data Base name 

Click the not started button and change it to 'Done'