Are you new to Java? Did you faced problem while creating a connection to SQL Server to NetBeans IDE.
This video is simple step by step solution for below error:
Cannot establish a connection to jdbc:sqlserver://127.0.0.1\SQLEXPRESS:1434;databaseName=[DBTest]
using com.microsoft.sqlserver.jdbc.SQLServerDriver (The TCP/IP connection to the host 127.0.0.1,
port 1434 has failed. Error: "Connection refused: no further information. Verify the connection
properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP
connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".)
Learn how to connect Java Application to SQL Server Database using JDBC Connection.