Java ME (Java Platform, Micro Edition) is a subset of the Java programming language designed for developing applications on resource-constrained devices, such as mobile phones, embedded systems, and IoT devices. It provides a flexible environment that allows developers to create applications that can run on various hardware and software configurations. Java ME includes a set of APIs and a virtual machine tailored for small devices, enabling features like user interface design, network connectivity, and data storage. It supports both connected and disconnected applications, making it suitable for a wide range of mobile and embedded applications.