Java class file not on classpath

Question

I've tried opening class file in eclipse that I have copied pasted from the jar that I have imported into the project and am receiving this as first error:

org.eclipse.core.runtime.CoreException: The class file is not on the classpath.

Evidently I have included the class file incorrectly into my project. I need to use this class file to access Java applet. Suggestions please

Answer 1

Rather than trying to copy the class file into your project, you should reference the Jar that the class you want is part of.

Go to: project->properties->java build path->libraries tab->add external jars...