First of all, the understanding of Java object-oriented concept. The first difficulty in learning Java is how to understand the concept of object-oriented programming in Java, which involves concepts such as class, interface and polymorphism. In the process of understanding these Java development concepts, we should start with the Java object-oriented programming process, which involves the definition of classes, the creation of objects and the call of methods. On this basis, we can gradually form our own Java programming ideas.

Second: Understanding of Java modular programming. Java is a highly abstract programming language, so for beginners, we can start with pattern programming first, and then further improve our understanding of modular programming. For Java programmers, modular programming ability has a very direct impact on their own Java development ability. In addition, in the process of understanding Java modular programming, you will gradually improve your abstract ability.

Third: the development framework of Java. Java development is closely related to development framework. Beginners can learn from the Spring development framework. For example, learning from SpringBoot is a good choice. At present, the Spring series framework is very large, and a "one-stop" solution can be completed based on Spring. The learning process of Spring framework is not complicated, but a series of experiments need to be completed.

Books, I recommend reading the book Practical Java Programming published by us.

This is a book that not only pays attention to actual combat, but also pays attention to the training of the underlying "internal strength" (memory analysis, JVM bottom, data structure). Very practical!

I hope I can help you, and I hope to adopt it!