Java Platforms refer to the various environments and tools that support the development and execution of Java applications. The most notable platforms include the Java Standard Edition (Java SE), which provides core functionality for desktop applications, and the Java Enterprise Edition (Java EE), designed for large-scale, distributed applications. Another important platform is the Java Micro Edition (Java ME), which is tailored for mobile and embedded devices. Each platform offers a set of libraries and APIs that cater to specific application needs, ensuring that developers can create efficient and scalable software across different devices and environments.