Please follow the provided steps, and let me know if need further help -
Start Command Prompt and Navigate to the folder that holds your class files:
C:> cd \mywork
Set path to include JDK’s bin. For example:
C:\mywork> path c:\Program Files\Java\jdk1.5.0_09\bin;%path%
Compile your class(es):
C:\mywork> javac *.java
Create a manifest file:
C:\mywork> echo Main-Class: DanceStudio >manifest.txt
Create a jar file:
C:\mywork> jar cvfm DanceStudio.jar manifest.txt *.class
Test your jar:
C:\mywork> DanceStudio.jar