What basics do Java programming need to master?

Java programming basic knowledge learning is every program ape into the field of programming must go through the learning process, only the basic skills of good, can have a more far-reaching and better development, then Java programming basic knowledge, what must be mastered?

1, master static methods and properties

Static methods and properties are used to describe the characteristics of a group of objects, not the characteristics of a single object. S tatic methods and properties are heavily applied in Java, which is a common technique. But this technique is not used frequently in many languages.

Understanding static methods and properties is useful for understanding the relationship between classes and objects, and is frequently used in a large number of Java specifications. L earners should therefore understand static methods and attributes. Java is consistent in calling methods and properties, and the difference is only expressed at the time of the declaration, which is different from C.

2, pay attention to the interface

Class inheritance is heavily used in early object-oriented applications. W ith the continuous development of software engineering theory, people began to realize the many disadvantages of inheritance, and began to try to replace inheritance with aggregation. T he important principle of software engineering solution scalability is abstract description, and the tool used directly is the interface. Interfaces have gradually become the core of Java programming methods in recent years.

On the other hand, in terms of applications, most development is based on specifications and does not require complex inheritance relationships and large classes of its own. Therefore, reading the specification and using the specification well has become the first task of application developers, Java specifications are the main means of description is the interface.

3, learn the collection framework

The main way Java describes complex data structures is through a collection framework. J ava does not have pointers, but describes complex data structures such as arrays and object arrays through a powerful collection framework. L earning how to describe these data structures is critical to application writing, especially when it comes to server-side, three-tier structure programming. Programmers can no longer describe data in structures such as database result sets at this time.

Since many languages do not have such a strong collection framework system, many beginners are at a loss, not to know what to use, so should be paid enough attention.

4, exception capture

Java's emphasis on exception capture is unprecedented, forcing programmers to describe exception snaps in a significantly different way than logical methods, which is of great significance to the integrity and rigour of program descriptions. T here are similar mechanisms, but we see that many c++ programmers are not used to using them. Java beginners should fully learn this exception capture mechanism and develop good programming habits.

5, multithreaded need to understand the mechanism

Many Java programmers are passionate about multithreaded programming as a challenge to logical capabilities. I n fact, there is no need to write multithreaded programs in a large number of applications, or most programmers who write applications do not write multithreaded programs. This is because multithreaded mechanisms are built into the underlying platform.

What programmers should understand is the principle of multithreaded and multithreaded security, which is critical to accurately grasping the program in the future. For example, writing to different locations in a JSP has a completely different security impact on multiple user environments, and the famous Super Servlet is every access as a process, but each page is a thread, in contrast to Servlet, which has a very different impact on the performance and security of the program.

6, understand network programming

Java is said to be the strongest network programming language, but most application developers never develop their own underlying network programs.

All you need to do is understand the principle. T he implementation of the network mechanism is implemented by the platform, unless you develop the platform yourself, you do not need to know how to implement socket, how to listen for access. So spending too much time on this is a departure from the assumption that future application development will take place on a mature platform, rather than developing it from the underlying platform yourself.