5-6 months. Java is an object-oriented programming language, which not only absorbs the advantages of C++ language, but also abandons the incomprehensible concepts of multiple inheritance and pointers in C++. The Java training course lasts for 5-6 months, starting at 8: 30 am and ending at 5: 30 pm every Monday and Friday, with evening self-study (18: 30-20: 30).