Category Archives: Java Programming

Do you think that Interfaces in Java inherit the members of the Object class? If NOT then how do you call many Object class methods on a reference of an interface type? Shouldn’t it be a compile-time error? Let’s try to understand what actually helps the compiler to know the signature of these Object class methods. And if you think your answer to the question is YES then how do you justify the fact that interfaces in Java don’t contain code, but only the signature. Does the rule changes in this case? Okay, so we have plenty of questions coming up irrespective of whether your answer is YES or NO. Let’s try to understand what internally happens.

JAAS delivers a framework for providing a mechanism to verify the client and to ensure that the client has the permissions required to approach a secured resource for all the Java applications. The Security agency on the Server side uses the same authentication information to accomplish a JAAS login in to the server side.

Java 6.0 introduces many Application Programming Interfaces and there are many enhancements in existing classes especially in collection APIs. The summary of changes in collection framework is listed below.

One of the beauties of using Java programming language is that the programmers need not worry about the memory allocation and freeing of objects. We simply declare and initialize objects and JVM(Java Virtual Machine) will take care of freeing them when they are no longer in use by any application through a mechanism called ‘garbage collection’. Before we start our topic, let us check how the memory is allocated for the objects.

What is garbage collection? It deals with identifying and freeing the memory of java application that are not used for a long time. There are two type garbage collection techniques, namely explicit and implicit methods. Implicit Garbage collection and Explicit Garbage collection Java run time system can invoke the garbage collector automatically so that the [...]

Java RMI based Client/Server application, in which a server will be used to serve requests of remote Java Clients for mathematical operations. This will allow the user to use the following operations: Add, Subtract, Square, and Multiply.

The concept of objects in a broad sense can be described as a collection of data along with the methods to manipulate the corresponding data. The Objects are be loaded into the memory before processing.

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