Objects whose state can’t be changed after its creation are called immutable objects. It is considered an effective strategy to make objects immutable if they are going to be used in multithreaded applications. Java’s built-in Strings, Integers are all immutable objects and so there must be some solid reasoning behind that. In this article, lets …
Java
Log4j 2 Example
This tutorial explains how to configure the Log4j 2 in your standalone application. Note that, this example will work only of your application is running as standalone. I will write another post for the web application configuration. The following steps explains how the Log4j 2 library loading the suitable configurations. Log4j will check the system …
Servlets Tutorials
Servlet is Java technology for writing the server side applications. It is the core technology used for developing any Java server applications. Any other Java frameworks created are internally using the servlet for hiding the complex part of how servlet handles the web application request and renders the response. However, knowing the internals of servlet …
How To Test Internet Connection Using Java
It is very often required to test the internet connection for performing some operations. If there is no internet connection established, then alternative logic will be executed. Java provides useful classes in java.net package for connecting to the internet. Here I written a very simple example to test if your system is connected to internet. …
FileStore in Java 7
FileStore is new class introduced in Java 7.0. It is part of java.nio package. This class helps in geting the type of storage for the files stored whether it’s a device, partition or concreate file system. Also this class defines the list of methods which is useful for getting information about the file storage such …
Difference Between Throw and Throws in Exception Handling
When you are working with exception handling in Java, use of throw and throws may confuse you if you not familiar with the exception handling. Both are important keywords used frequently used in handling the exceptions. Throw is used for explicitly throwing an exception. Throw attribute in method signature, is a hint to the compiler …
Instance Initializer in Java
Instance initializer in Java is used for initializing the instance variables inside a class. It is a simple block without any modifiers used inside any class. If you declare a instance variable with value, then this value can be overridden in the instance initializer or in the constructor. The order of the execution as follows: …
Difference Between Class.forName() and ClassLoader.loadClass()
Class.forName() and ClassLoader.loadClass(), both the classes dynamically loading the classes to the classpath. However, there are subtle difference on initializing the classes at the time of loading and from where it is loaded. This tutorials compares both the form of class loading with simple examples. Class.forName() By default the classes are initialized at the time …