Java architecture is the process of designing and developing software applications using the Java programming language. It involves a systematic approach to creating software that meets the needs of the end-users while also adhering to best practices and industry standards. Java architecture involves multiple layers, including the presentation layer, application layer, and database layer, and the architecture must be scalable, maintainable, and secure. A Java architect must possess a deep understanding of Java programming concepts, design patterns, object-oriented programming, and database technologies to build robust and successful software applications.