The Couchbase Java SDK integrates well with RxJava, allowing developers to write reactive code for N1QL queries. The provided examples demonstrate how synchronous code can be simplified and made more efficient using RxJava. With RxJava, the same query is executed asynchronously, transforming the data into a Java Map and returning it as an observable value. This approach provides an event-based method for handling asynchronous data manipulation, making it simple to use and powerful in its application.