To make things as easy as possible, we have several platform SDKs you can import into your development environment to get up and running quickly. The SDKs contain platform-specific libraries that wrap the raw HTTP calls to the Dropbox API. They are designed to shorten the distance between your application and integrating Dropbox.
The necessary JAR files are in the "lib/" folder.
If you're using Maven, you don't need to download anything manually. Just add the following to the dependencies section of your pom.xml.
<dependency> <groupId>com.dropbox.core</groupId> <artifactId>dropbox-core-sdk</artifactId> <version>[1.7,1.8)</version> </dependency>