I graduated in 15 years, and I have been engaged in java development after graduation. It has been almost three years now. I still feel that I have no luck in technology. Java-related data and blogs, but I always feel that I only read 40% to 50% of it, and then I forget it after a period of time. In the process of learning, I felt that the basics of java were very important for a while, and I felt that for a while. Redis, dubbo, spring and other framework technologies are very good. I want to see the source code of spring, but I feel that the foundation is not enough, so I go back and forth; from work to now, I have changed a total of three or four companies. The two have only stayed for a year, and the projects they encountered did not use any advanced technology. They were all simple business logic projects with a single customer, little concurrency, and no advanced technology. , the general technology can also be done; during this period of time, or now, my idea of learning java technology is to master and understand the technology I have encountered, so that I accumulate little by little, maybe tomorrow I may feel that I should still Looking at the analysis of spring source code, the startup process of tomcat or the principle of JVM, I feel that there are too many technologies in the java world, endless, and the confidence in learning dissipates instantly. So I would like to ask the great gods who read my blog to give some advice, please take me.