NoClassDefFoundError when using Java Coinbase API
Well the problem is that the Coinbase Java Api depends on the Jackson JSON processor, along with several other dependencies that can be found here, and I'm assuming that the jar that you download didn't come with all of these dependencies packaged inside it which means that they won't be on your classpath just because you've added the coinbase jar. You could either try to resolve these dependencies manually, which would be incredibly tedious and unnecessary, or you could use a build automation tool. Considering that the Coinbase Java API was built with it in mind I would recommend setting your project up to use Maven.