Error in eclipse : Import javax.sound.sampled.* cannot be resolved

I am trying to run a project in which a file uses the line

    import javax.sound.sampled.* ;

When I try to compile it in Eclipse (running on Ubuntu) it shows the error that this line cannot be resolved. Can anyone help me out how to install this package. 
Error in eclipse : Import javax.sound.sampled.* cannot be resolved
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I am trying to run a project in which a file uses the line

    import javax.sound.sampled.* ;

When I try to compile it in Eclipse (running on Ubuntu) it shows the error that this line cannot be resolved. Can anyone help me out how to install this package. 