Error when using JDBC Driver- java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver

I am trying to use the Microsoft SQL Server 2008 Type 4 JDBC Driver in a java desktop application.

However when I run the program I get the following error--

java.lang.ClassNotFoundException: com.micr开发者_高级运维osoft.sqlserver.jdbc.SQLServerDriver

How do I overcome this error? The code looks to be OK as it is...Its a single sql statement to be executed into local sql server 2008 database.

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Make sure that the .jar containing this driver is in your CLASSPATH. Here's an article explaining how to setup this.