Java Blog

It’s one month old news as of today. Still if you are not aware, Apache software foundation one of the most respected group and it moves away from JCP citing license issues and Oracle’s strong hold on java. Java benefited in many ways for more than 10 years from Apache. It chaired the JCP executive [...]

Java has only two types of memory when it comes to JVM. Heap memory and Non-heap memory. All the other memory jargons you hear are logical part of either of these two. Heap Memory Class instances and arrays are stored in heap memory. Heap memory is also called as shared memory. As this is the [...]

As of the Java Virtual Machine Specification second edition, numeric types, the boolean type (§3.3.4), and the returnAddress type are the three java primitive types supported by JVM. Most of you may get annoyed, we all know about the primitives of java. That is where from we all started it. But, you may not be [...]

Java generics uses Types. If you are not still using java generics, following example code explains you a simple generics usage: package com.javapapers.sample; import java.util.HashMap; import java.util.Map; public class TypeErasure { public static void main(String args[]) { Map<String, String> languageMap = new HashMap<String, String>(); languageMap.put("1954", "FORTRAN"); languageMap.put("1958", "LISP"); languageMap.put("1959", "COBOL"); String language = languageMap.get("1954"); System.out.println("Our [...]

AJAX is an acronym for Asynchronous JavaScript And XML. AJAX provides an ability to communicate with the server asynchronously. Here asynchronous is the keyword. To explain that in simple terms, you can send a request to server and continue user interaction with the user. You need not wait for response from the server. Once the [...]

I recently noticed that James Gosling moved his blog from sun’s site to his own blog with a cool domain name. Also, I noticed in his bio that he is unemployed. Yes, you read it right, James Gosling is unemployed! Oracle bought Sun some time back. We are all eagerly watching the events aftermath. I [...]

When creating an object is time consuming and a costly affair and you already have a most similar object instance in hand, then you go for prototype pattern. Instead of going through a time consuming process to create a complex object, just copy the existing similar object and modify it according to your needs. Its [...]

In conventional java programming, you will never need address or location of a java object from memory. When you discuss about this in forums, the first question raised is why do you need to know the address of a java object? Its a valid question. But always, we reserve the right to experiment. Nothing is [...]

These terms signify the relationships between classes. These are the building blocks of object oriented programming and very basic stuff. But still for some, these terms look like Latin and Greek. Just wanted to refresh these terms and explain in simpler terms. Association Association is a relationship between two objects. In other words, association defines [...]