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The poor acquisition rate in India is owing to inaccessibility of physical infrastructure in rural and remote areas will be wherever m-Education services can play a crucial role by reaching remote plenty.

In this blog we are explaining about how to create trigger for DML, DDL and logon server.

SDLC stands for Software Development Life Cycle. It is the process to design, develop, test or alter the software products. The international standard followed is ISO/IEC 12207, which defines all the tasks to develop and maintain the software.

Information sent by the user are visible to everyone (all name and values are displayed in the URL). So, GET method cannot be used to send sensitive information (like password).

PHP  Handler 

Loop is used when we want to execute a same code for several times. In PHP we have 4 types of loop:

PHP  Loop 

We have covered how to persist the object state to a disk file. In many situations, the classes in a program evolve over time.

A Serializable object may contain references to other objects. We may be wondering if we serialize an object, whether the nested objects are also serialized.


A program that illustrates the use of the Externalizable interface is given here. Note that the program uses Java’s security API. We need not worry about the security code while learning the importance of the Externalizable interface.

In the previous posts, we saw how to store and retrieve the objects using Serialization. We’ll now look at another very important technique for storing and retrieving objects.

The StreamTokenizer is another very useful class that parses an input stream into tokens. This class is not derived from InputStream or OutputStream. Yet, it is classified under the I/O library.

So far we have been using System.out to print messages to the console. Java SE 6 added a Console class to enhance and simplify command-line applications.

This is a very convenient class that has the ability to print representations of various data values, such as all primitive types. During printing it converts all characters into bytes using the platform’s default character encoding.

As seen in the previous post, we need to construct an instance of a user-defined exception; the Java runtime cannot detect and create instances of user-defined exceptions.

Sometimes we may find that the exception messages given by the standard exception classes are not intuitive, and it may be necessary to provide more elaborate messages to the application user.

The throw keyword (note the singular form) is used to force an exception.

Suppose we are asked to develop communication software such as an FTP (File Transfer Protocol) or Telnet program that uses a modem.


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