The training courses provided by Java training institutions are usually concentrated, focusing on practice and skill training, so students can master certain Java skills in a short time. If you study hard and complete the practical projects required by the course within four months, then you will certainly be able to master certain Java skills and have certain development ability.

However, it should be noted that the training courses provided by Java training institutions are usually only aimed at the Java language itself, while the undergraduate courses of computer science or software engineering provided by universities cover a wider range, including data structures, algorithms, operating systems, programming languages and other knowledge. Therefore, from the breadth of knowledge, studying in a training institution for four months is not necessarily equivalent to studying in a university for four years.

University education is not only about learning skills and knowledge, but also includes a wider range of educational contents, such as the cultivation of humanities and social sciences, mathematics, physics and other knowledge, and the improvement of critical thinking and innovation ability. Education in these areas is also important, but it may not be the main focus of Java training institutions.

So I think the four-month study in Java training institutions is effective and can help you master certain Java skills. However, compared with the four-year study in the university, the two have different concerns and cannot be simply equated. If you want to further develop in the computer field, besides mastering Java skills, you need to constantly expand your knowledge and skills and improve your ability and level through continuous study and practice.