First of all, the cost of Java training varies with institutions, courses, teaching quality and popularity. Generally speaking, the cost of offline Java training institutions is relatively high, which may cost more than 20,000 yuan. Pure online Java training institutions are relatively cheaper, because there is no need to bear the cost of venues, equipment and so on. Generally speaking, the cost of a pure online Java training institution may be between 5000- 1000, and the specific cost depends on the course setting, teaching quality and popularity of the institution.

However, it should be noted that although online Java training institutions are relatively cheap, students need to have certain autonomous learning ability and time management ability, because online learning needs to arrange their own learning progress and time, and needs to be more self-disciplined and planned. In addition, online learning may not be as interactive and social as offline training, so you need to pay more attention and practice.

Besides attending Java training, there are many online education platforms, open source projects and technical communities that can provide a large number of Java learning resources and learning opportunities. If you want to learn Java development skills, you can learn them for free or at low cost through these resources.

Finally, I want to say that no matter which way you choose to learn Java development, the key is to study hard, think positively and practice constantly. Only by continuous study and practice can we truly master the relevant knowledge and skills of Java development and become an excellent Java developer. At the same time, we should also pay attention to the choice of learning methods and institutions that suit us. Don't blindly follow others' choices, but make decisions according to your own actual situation and learning needs.