By Jan Graba
Because the moment variation of this article, using the net and networks in general has persisted to extend at a good looking expense. This has ended in either a rise famous for community software program and to advancements within the know-how used to run such networks, with the latter certainly resulting in alterations within the former. in this time, the Java libraries were up to date to take care of with the hot advancements in community know-how, in order that the Java programming language is still one of many mainstays of community software program development.
In delivering a truly readable textual content that avoids getting immersed in low-level technical info, whereas nonetheless delivering an invaluable, sensible advisor to community programming for either undergraduates and busy IT pros, this 3rd version keeps the craze of its predecessors. To keep its foreign money, the textual content has been up to date to mirror alterations that experience taken position in Java's community know-how during the last seven years (including the discharge of Java 7), when protecting its extraordinary positive aspects of various code examples, screenshots and end-of-chapter routines.
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Extra info for An Introduction to Network Programming with Java: Java 7 Compatible (3rd Edition)
There was no real tool to easily reuse a build script between different projects (copy/paste was the only way). In 2002, Apache Maven was born, and this project not only addressed these issues, but also went beyond being a simple building tool. Maven offers projects a building solution, shared libraries, and a plug-in platform, allowing you to do quality control, documentation, teamwork, and so forth. Based on the “convention over configuration” principle, Maven brings a standard project description and a number of conventions such as a standard directory structure (as shown in Figure 1-9).
JUnit took an important place in achieving test-driven development (TDD). How Does It Work? Since JUnit 4, writing unit tests is simplified by using annotations, static import, and other Java features. Compared to the previous versions of JUnit, it provides a simpler, richer, and easier testing model, as well as introducing more flexible initialization, cleanup, timeouts, and parameterized test cases. Let’s see some of the JUnit features through a simple example. Listing 1-7 represents a Customer POJO.
Derby displays some information to the console such as the port number it listens to (1527 by default). Derby comes with several utilities, one of them being sysinfo. Open a DOS command line, enter sysinfo, and you should see information about your Java and Derby environment, as shown in Figure 1-14. Figure 1-14. sysinfo output after installing Derby Usage Derby provides several tools (located under the bin subdirectory) to interact with the database. The simplest are probably ij, which allows you to enter SQL commands at a command prompt, and dblook, which lets you view all or part of a database’s data definition language (DDL).