We said that the constant pool contains a great deal of information. In fact it contains an interesting mixture of items. The constant pool combines the function of a symbol table for linking purposes as well as a repository for constant values and string literals present in the source code. It may be considered as … Read more
The class file contains a lot more information than its cousin, the executable file. Of course, it still contains the same type of information: program requirements, an identifier indicating that this is a program and executable code (bytecode, in this case). However, it also contains some very rich information about the original source code. The … Read more
In this article we show you how to apply the security features of Java 2 to applets and applications running on your system. Applying a Security Manager to Applets and Applications The security manager is invoked by all the Java system code to perform access control checks based on the security policy currently in effect. … Read more
The Need for Java Security From its inception, Java has shown that it was designed for the net. Java brought about, for the first time on a large scale, the concept of dynamic loading of code from a source outside the system. Though this is very powerful, and adds several features to the system using … Read more
Once you have installed the Java 2 SDK, you can start creating Java source code and compiling it. Java is like any other high-level programming language, in that you write the source code in an English-like form. The source code then has to be converted into a form that the machine can understand before it … Read more
There are a number of different components to Java: 1. Development environment The Java 2 SDK contains the tools and executable code needed to compile and test Java programs. However, unlike a normal language, the Java 2 SDK includes object frameworks for creating graphical user interfaces, for networking and for complex I/O. Normally, in other … Read more