What can java do? How come?

I have begun to feel similar to you, but you can follow the following steps to understand.

First of all, you should make it clear that java itself is a language, which is no different from Chinglish. How do you feel after learning English for several years? What can English be used for? Everything in a language has a * * * feature, that is, you can understand it quickly but it is difficult to master it deeply. So is java. There are so many coding principles and specifications that you can learn them quickly, but if you want to go deeper, you have to learn and use them slowly, which is urgent.

So what can java do? I asked the teacher, and the teacher replied, "You can do anything. Programming in java can do anything you can think of. It's no use talking. You can experience it yourself later.

Java is divided into three parts, javase, javame and javaee, which you must know, but the difference between them is difficult to understand, because you are only using java, not learning Java. It can be said that writing a file with a complete java suffix in helloworld means using javaee for enterprise application and website development with javase, and using javame for mobile development or embedded development.

Java itself is a platform. I think you may be asking what IDE java uses to play mobile games. I really don't know this, because I'm not javame, and now javame has only one android, so if you want to know this, just read the book developed by android.

Generally speaking, java enterprise development does not use eclipse, and each company has its own choice. For example, I am using oracle's jdeveloper now, and it doesn't matter what tools I use. I can get started quickly anyway. As long as you are proficient in one, everything else is similar.

Of course, java has interfaces. Otherwise, how did you make your so-called hand tour? Definitely not console output. Java's swing class provides java's visual interface development. You can search the development code of java calculator, and you will understand. You may want to develop a visual interface in eclipse, but unfortunately, you can only see the code in eclipse and run it to see the interface.

In addition, the general development you mentioned may also be problematic. Do you mean doing your own homework or applying it in the enterprise? Java desktop software is rarely used in enterprises, because the advantage of java lies in its distribution and portability, and desktop software Java is not dominant, so enterprise-level development is generally B/S architecture, that is, web development, and swing is not used much.

Web page parameters are passed independently of xml. Xml controls the direction of the whole project, not which page. The parameters of the web page are all called by yourself or using the framework, and your background understanding is problematic. The web page we develop is the background itself, or the server itself, and what is passed to users is processed. As for the background you understand, it is the data processing background of the website. Servlet and javabean are generally used instead of javase, and there are too many others, because you don't understand them correctly. You can ask me specifically what you want to know.

I won't go into details. I've said too much now. Ask me if you don't understand.