First of all, Java training is just a way of learning, which can help you master some basic knowledge and skills, but actual development needs more practice and experience. Therefore, if you simply complete Java training and don't have enough practical experience, you may need further study and practice to be competent for practical work.
Secondly, Java development is an ever-changing field, and new technologies and frameworks are constantly emerging. If you only learn basic knowledge and skills when attending Java training, but don't keep up with the latest technology and trends in time, then you may need further study and practice to meet the actual work needs.
In addition, for some students who have no actual project experience, they may need more practice and experience to be competent for practical work. Some training institutions may provide some practical projects or internship opportunities so that students can accumulate experience and improve their skills in practical projects. These practical projects or internship opportunities are also of great help to students' employment and career development.
To sum up, whether you can work directly after attending Java training depends on your personal learning and practical ability. If you have enough basic knowledge and skills and some practical experience, then you may be able to work directly. If you need to further improve your skills and experience, you may need further study and practice to be competent for practical work.
So I suggest that when attending Java training, we should pay attention to the accumulation of practice and experience, and participate in practical projects or internship opportunities as much as possible. At the same time, we should pay attention to keep up with the latest technology and trends, and constantly learn and improve our skills and abilities. Only in this way can we get better employment opportunities and career development prospects in the fierce competition.