Q:

Q: I can't start Database connection in Eclipse

I try about half a day to start database server in Eclipse without effect... 
I've the newest Eclipse MARS.  I opened the view of Data Source Explorer and right-click on the Database Connections, choose New > Derby and Define new driver of Derby Client JDBC Driver 10.2 and select JAR List > ADD JAR/Zip, I downloaded the driver to derby version 10.2.2.0.  
I set...
Database: sample
Host: localhost
Port number: 1527
User name: sa
Password: sa
..and try to run the new created server and then ERROR pop-up with information 
Could not connect to New Derby. 
Error creating SQL Model Connection connection to New Derby. ( Error: java.net. ConnectException: Error when connect with server localhost at port 1527 with message Connection refused: connect.) 

Anyone have problem with that ?  I try the same with other type of databse (I try MySQL, downloded too the newest drivers and I have the same error). 

A:

Try the official instructions to install and run the database server! 
Apache Derby Server Tutorial
When your server is running, you can setup the connection.