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    • C++ Templates

      A template is one of the features added to C++ recently. It is a new concept which enables the programmer to define generic classes and functions, thus provides support for generic programming. Generic programming is an approach where generic types are used as parameters in algorithms so that they work for a variety of suitable

    • NoClassDefFound

      NoClassDefFound

      NoClassDefFound means “No Class Definition Found”. NoClassDefFound is an error from the JVM when it cannot find a class required to run a Java program. This error could be caused by an actual missing class, but it is usually caused by a faulty CLASSPATH. This error also sometimes occurs when Java users add the unnecessary

    • Constructors in Derived Classes

      A constructor plays a vital role in initializing an object. An important note, while using constructors during inheritance, is that, as long as a base class constructor does not take any arguments, the derived class need not have a constructor function. However, if a base class contains a constructor with one or more arguments, then

    • JRE (Java Runtime Environment)

      JRE (Java Runtime Environment)

      The JRE is the Java Runtime Environment. The JRE consists of the Java Virtual Machine, the Java libraries, and all other components necessary to run Java applications and applets. Sun distributes the JRE seperately, or as part of J2EE, J2SE, and J2ME.          

    • Trees

      Trees

      Arrays, linked lists, stacks and queues are used to represent linear and tabular data. These structures are not suitable for representing hierarchical data. In hierarchical data we have ancestors, descendants superiors, subordinates, etc Family Structure Business Corporate Structure Federal Government Structure Introduction to Trees Fundamental data storage structures used in programming Combine advantages of ordered

    • Java Servlet

      Java Servlet

      A Java Servlet is the Java technology used to extend and improve Web server functionality. Servlets are able to provide a platform independent way to build web-based applications founded upon components without the performance limitations found with comparable CGI applications. Since Java Servlets are platform and server independent, they can be deployed across the full

    • Address Calculation Sort

      In this method, a function fn() is applied to each key. The result of this function determines into which of the several sub-files the record is to be placed. The function should have the property that x <= y, fn (x) <= fn (y). Such a function is called order preserving. Thus all of the

    • Display Messages using Flashdata in CodeIgniter

      Flashdata is a functionality in the CodeIgniter framework that lets you make required data available for the next server request. It makes use of session, but unlike normal session behavior, the passed data is available only for the next server request and is automatically cleared thereafter. Therefore, Flashdata can be very useful in displaying notifications

    • What is PLC Programming?

      What is PLC Programming?

      PLC (Programmable Logic Controller) programming allows a computer to automate mechanical or electrical processes for machinery, lighting, or assembly line control actions. Over the past two decades, PLC programming has been used in a number of industries. The PLC’s design allows it to take multiple inputs and provide various outputs. A PLC device is also

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