I want to learn java. I had no foundation before. How should I learn?

I have taken many classes in JAVA and C++, and many students who come to study are beginners, some of whom are very interested in finding a job. They all want to master it in just a week or two, which is unrealistic. Moreover, it is easy to make yourself restless and it is difficult to calm down and think.

JAVA is popular, but we can't get carried away by ourselves. I think all beginners must learn any computer technology such as JAVA or C or UNIX well.

Do it, use your head, speak and meditate.

Among them, hands-on is the most important. Many people learn computer technology by reading books and listening to lectures. I understood it at that time, but I forgot it immediately afterwards. If you don't want to type, you might as well not learn. Even if sometimes you can't understand the typed code, you can run it first to see the results, increase your perceptual knowledge, and then rise to rational knowledge. Especially when doing exam questions, many things and concepts can be deeply understood by just knocking on a program and doing an experiment, but many people are unwilling to do it. Can this study be efficient?

To speak with your head is to think more and think more, and say what you don't understand. Many people can't ask questions without thinking about them. There are also some people who are afraid of asking silly questions and being laughed at. In fact, the IT industry is very technical, and it is normal for people who have worked for 5 or 6 years to say something stupid.

Then meditation is very important. Now the society is very impetuous, and the IT industry is even more impetuous. You can't learn anything well with this mentality. I found a group of C++ students and gave them the basic knowledge of C++, pointers and so on. They said it was too basic to learn. If I want to talk about advanced things, I will teach them WIN32, and they said, just teach MFC. Ok, I'll take them to make a small MFC program. As a result, some people don't even know that C++ is case-sensitive. Many students studying JAVA asked me to talk about EJB and popularity. It's easy for me to say that you have learned the basic things, such as EJB, otherwise it's putting the cart before the horse. Of course, some people are in a special situation and are in a hurry to work. It is easy to learn JSP, SERVLET and JDBC, and it is easy to find a job, but the foundation will be supplemented in the end. Many people have been doing JAVA for several years and don't even understand polymorphism and threads.

In JAVA, some concepts are difficult to understand. Some students say that I just don't understand thread. I think it takes time to understand. If you can't understand it at once, you can read it more or even recite it several times. Read it a thousand times, its meaning is self-evident, and it is effective now. Moreover, I think when I first get started, I should do more and type more code. When you do enough and know more, concepts and theories will be easy to understand.

The essence of JAVA lies in object-oriented thinking, just as pointers are the essence of C language, you can master them with more brains.