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Home/ Questions/Q 8076767
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Editorial Team
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Editorial Team
Asked: June 5, 20262026-06-05T15:19:59+00:00 2026-06-05T15:19:59+00:00

if I run java -classpath ./sqljdbc4.jar myclassname error is Exception in thread main java.lang.NoClassDefFoundError:myclassname

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if I run java -classpath ./sqljdbc4.jar myclassname error is

Exception in thread “main” java.lang.NoClassDefFoundError:myclassname

if I run java myclassname error is

java.lang.ClassNotFoundException:
com.microsoft.sqlserver.jdbc.SQLServerDriver

It is on Linux. How to fix it?

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  1. Editorial Team
    Editorial Team
    2026-06-05T15:20:00+00:00Added an answer on June 5, 2026 at 3:20 pm

    The directory or jar containing your classes package tree (i.e. the directory containing the com directory, in the following example) must be in the classpath. And the sqljdbc4.jar must also be. Put both in the classpath:

    java -cp ../classes:./sqljdbc4.jar com.foo.bar.MyClassName
    

    Also note that you need to use the fully qualified name of the main class (as the above example shows), and that class names in Java use CamelCase by convention.

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