Java + Spring is a powerful software stack that provides developers with a comprehensive set of tools for developing modern applications. Java is a popular, general-purpose programming language that is particularly well-suited for developing large-scale, distributed applications. It has an extensive library of classes and methods that make programming easier. Spring is an open-source application framework that is built on top of Java. It provides a comprehensive set of features such as dependency injection, declarative programming, and transaction management that make it well-suited for developing enterprise-level applications. Together, Java and Spring provide developers with a powerful platform for quickly developing robust and reliable applications.