Run/Integrate jasperreport in Java

Hi Experts,

Please help me on how can I run jasper report in Java. I want to create a stand alone java program that when I click Preview button Jasper report will preview.

What files are needed to run and compile the program? When I try compiling the program I've encountered an error message like this:

cannot locate the package.... something like this.
import net.sf.jasperreports.view.JasperViewer;

So I cant compute the java program.

Thanks in advance.