A Java Instructor is responsible for teaching students or professionals how to program in Java. They design course materials, deliver lectures, and provide hands-on coding exercises to help learners understand core Java concepts, such as object-oriented programming, data structures, and frameworks. Additionally, they assess student progress, provide feedback, and may assist with career guidance. Java Instructors work in educational institutions, coding bootcamps, or corporate training programs to equip learners with the skills needed for software development.