Adding methods to an Enum

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Enums introduced in Java 5.0 are just compiled java classes with some extra behavior. So you can basically do whatever you can in a normal java class inside an enum as well. That includes adding methods , class level variables and constructors to an enum. Adding methods to an enum works just like adding methods […]

What is transient keyword in Java?

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This article explains about the transient variable and when it will be used in the Java programming. Another important fact is that, this question is most frequently asked in the Java interviews for checking the basic knowledge of a programmer. Another point is that this keyword is not frequently used by programmer in the normal […]

Ordering Queue Using Comparator Interface and PriorityQueue

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The basic use of Queue class is to provide a data structure which allows storing objects in a First in First out(FIFO) format. But sometimes one wants to maintain the ordering, based on some other metric. This is exactly the purpose of PriorityQueue, another Queue implementation. You provide it a Comparator, and it does the […]

Introduction to Java Module System in Java 7.0

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This article explains the new Java Module System that will be included in the Java 7.0 release. Modules are new to the java language and they provide a standard for developing and deploying applications. The article will explain the various sub components that are available as part of the Java Module System’s architecture. The various […]

Functional Testing using Apache JMeter

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Introduction to Functional Testing JMeter is found to be very useful and convenient in support of functional testing. Although JMeter is known more as a performance testing tool, functional testing elements can be integrated within the Test Plan, which was originally designed to support load testing. Many other load-testing tools provide little or none of this feature, restricting themselves […]

Swing Extreme Testing : Learn Swing user interface testing strategy

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The ‘Ikon Do It’ application has a Save as function that allows the icon on which we are currently working to be saved with another name. Activating the Save as button displays a very simple dialog for entering the new name. The following fi gure shows the ‘Ikon Do It’ Save as dialog. Not all values are allowed as […]

JDBC connection in JDeveloper with MySQL database

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The Java Database Connectivity (JDBC) API is used to access a SQL database from a Java application. JDBC also supports tabular data sources, such as a spreadsheet. Oracle JDeveloper is a free Integrated Development Environment (IDE) for modeling, developing, debugging, optimizing, and deploying Java applications. JDeveloper 10g is used to develop J2EE applications comprising the JSPs, […]

Circular Linked List in Java

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Had to implement a circular linked list recently. Here’s my take, suggestions are welcome. The list can be parameterized for any type which has a meaningful equals method defined. The main method shows a sample usage of the Circular linked list with the String type. Only add, remove and size method are implemented. also read: […]

Sample code for SimpleDateFormat

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also read: Java Tutorials Java EE Tutorials Design Patterns Tutorials Java File IO Tutorials

Sample code for Listing file names in a directory

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also read: Java Tutorials Java EE Tutorials Design Patterns Tutorials Java File IO Tutorials