Learn Java language development, these have to know

Java learning is more complex, mainly in a series of related platforms, specifications and protocols. Experienced Java programmers know that only mastering the Java language itself is difficult to develop applications. Summary of some of the Java language Learning Essentials, for beginners, should be very useful, for reference only!

1. The purpose of the study is to develop the application in the future, rather than to study the theory of language

2. Future application development is carried out on a mature platform rather than from the underlying development platform

First, Master static methods and properties

Static methods and properties are used to describe the characteristics of a class of object groups, rather than the characteristics of individual objects. Static methods and properties are heavily applied in Java, which is a common technique. However, this technique is not frequently used in many languages. Understanding static methods and properties is helpful in understanding the relationship between classes and objects, where static methods and properties are used frequently in a large number of Java specifications. Therefore learners should understand static methods and properties. Java is consistent in the invocation of methods and properties, and the differences are expressed only at the time of declaration, which is different from C + +.

second, attach importance to the interface

class inheritance was used extensively in object-oriented early-stage applications. With the development of software engineering theory, people began to realize the many shortcomings of inheritance, and began to use aggregation instead of inheritance. The important principle of software engineering to solve extensibility is abstract description, and the directly used tool is interface. Interfaces have become the core of Java programming methods in recent years. On the other hand, in terms of application, most of the development is built on the basis of the specification, do not need to build complex inheritance relationships and large classes. Therefore, reading the specification and good specification has become the first task of application developers, the main description of Java specifications is the interface. For example, in the development of the Android software cloud encryption, that is, API automatic encryption interface, do not know to enter here to learn more:http://www.ijiami.cn/appprotect_encrypt_way

Three, learn the set framework

The main way in which Java describes complex data structures is the collection framework. Instead of pointers, Java describes complex data structures such as arrays, arrays of objects, and so forth through a powerful collection framework. Learning these methods of describing data structures is critical for application authoring, especially for server-side, 3-tier structural programming. At this point, programmers can no longer use structures such as database result sets to describe data.

Because many languages do not have such a powerful collection framework system, many beginners are at a loss, and do not know what to do with, so should be given enough attention.

iv. Seizure of exceptions

Java's emphasis on exception captures is unprecedented, forcing programmers to describe exception captures in a way that is significantly different from the logical approach, which is significant for the completeness and rigor of the program description. C + + also has a similar mechanism, but we see a lot of C + + programmers are not accustomed to using these mechanisms.

Java Beginners should fully learn this exception capture mechanism, develop good programming habits, and then use their own knowledge to use, for example, to participate in a programming contest: http://www.ijiami.cn/newsInfo?id=519&v=2

Five, multithreading needs to understand the mechanism

Many Java programmers are keen on multi-threaded programming, which is considered a challenge to logical capabilities. In 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 the multithreading mechanism is built into the underlying platform.

Programmers should understand the principle of multithreading and multithreading security, which is critical to accurately grasp the program in the future.

For example, in JSP writing to different locations for multiple user environment security impact is completely different, and as the famous super servlet is every access as a process, but each page is a thread, and the servlet just the opposite, the performance and security of the program's impact on the difference.

VI. Understanding Network Programming

Java claims to be the strongest network programming language, but most application developers never develop the underlying network programs themselves. Need to do just understand the principle is enough. The implementation of the network mechanism is achieved by platform, unless you develop the platform, otherwise it is not necessary to know how to implement the socket, how to listen to access. Therefore, too much effort in this regard deviates from the assumption that "future application development will be carried out on a mature platform rather than from the underlying development platform".

Seven, the importance of safety protection technology

Many programmers develop programs that do not pay attention to, bugs everywhere, although the bug is a programmer's mission, but if from the beginning of attention, the process will not go so hard. Based on the developer's limited time, we can use the third-party platform to achieve the purpose of security protection, double win. For now, more professional love encryption, they provide security assessment and processing, Dex triple protection, so library encryption, custom protection services, has many well-known domestic apps to provide security services, customers involved in games, finance, banking, payment and other industries, and telecommunications, mobile operators, and cooperation, Provides a holistic encryption protection service for the platform. And can also be tailored to the specific needs of customers to customize a secure encryption solution! http://www.ijiami.cn/appprotect_mobile_games

Learn Java language development, these have to know