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Easy Learn Java: Programming Articles, Examples and Tips - Page 297


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Java: Strength

Go to all tips in General Java

Java: Strengths

Java is an excellent programming language. For most programming it's better than older programming languages like C or C++.
Productivity The top reason Java has become popular is because of the increased productivity of Java programmers. It is claimed, and my experience is in agreement, that Java programmers have about double the productivity of C/C++ programmers.
GUI Java a good, portable library for a Graphical User Interface (GUI). Most programming languages supply only a text mode interface.
Internet Java lets you easily use the Internet. Most languages were designed before the Internet was born!
Portability Java programs can run on many different machines (Intel, Sparc, PowerPC, ...) and many different operating systems (Windows, Unix, Macintosh, ...). You can move a C program if it is written very carefully, but it is usually difficult or impossible. In contrast, it easy to move most Java programs.
Reliability Java programs are more reliable because Java doesn't have very dangerous things like C/C++'s pointer arithmetic. Java also checks array bounds and other error-prone operations. Memory management is much safer because Java does automatic garbage collection.
Libraries Java has a very large number of packages which extend the language. Therefore it is unnecessary to call the operating system directly.
OOP Object-oriented programming features (inheritance, encapsulation, and polymorphism) make many programs, especially large programs, easier to write.
Large Programs Java supports large programming projects with object-oriented programming, packages, and components (JavaBeans).


14 comments | Printer Friendly Page  Send to a Friend | Score: 4
Posted by jalex on Sunday, January 30, 2005 (00:00:00) (4545 reads)

Secure a J2ME Environment with JCE

Go to all tips in Security
Implementing a customized security library is expensive and unsuitable for medium and small applications. The Java Cryptography Extension, while the accepted standard for these apps, brings up a host of other problems. This article analyzes those problems and demonstrates how to solve them.

In this article, we analyze the common issues associated with using JCE, the standard security library for J2SE, in a J2ME environment. We illustrate how to solve these problems step by step, including sample code, and show how to implement the AES (Advanced Encryption Standard) algorithm with JCE in a J2ME environment. For our working environment, we will use IBM® WebSphere® Studio Device Developer (Device Developer), Foundation Profile, and IBM JCE. However, because the tools and libraries we use conform to an open standard, you can apply the approach to all other kinds of development environments that adhere to J2ME and JCE standards.

To start, we'll review the two steps required in the standard JCE installation for J2SE. The first step is adding a JCE provider, such as the IBM JCE provider, into the java.security file. Listing 1 shows how.



7 comments | Printer Friendly Page  Send to a Friend | Score: 5
Posted by Anonymous on Saturday, January 29, 2005 (00:00:00) (3453 reads)

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