Java has a huge knowledge system, which is closely related. It is absolutely impossible to fish for three days and dry the net for two days. Weekend classes for Java training will only waste your time. When I was training, I attended classes five days a week and talked for 6-7 hours a day. /kloc-before 0/2 pm, I basically didn't sleep, either in class or doing exercises, so I studied for four months before I started. Java training weekend class, only two days a week, how long will it take to graduate? The basic course of Java has more than 20 days. If you only learn the basics of Java in weekend classes, it will take two and a half months to finish, but I advise you not to think about it. Basically, you have forgotten last week's knowledge in class this week.