Wrapper class
Wrapper class were a solution of the primitive data type not
being a part of object oriented approach of java….like being returned from a
method as a method.
Java allows you to
include the primitives in the family of objects by using what are called wrapper classes
There is a wrapper class
for every primitive in java.. the wrapper class for int is Integer, for float
is Float.
The
wrapper classes in the Java API serve...
Tuesday, 27 August 2013
Class in JAVA
BASIC
All the objects that have similar properties and
similar behavior are grouped together to form a class. Class is the java way to
implement encapsulation.A class is a user
defined data type and objects are the instance variables of class.
GENERAL
FORM OF CLASS
A class is declared by use of the
class keyword.The data, or
variables, defined within a class are called instance variables because each
instance
of the class (that...
A Brief History and Overview of SQL
SQL began life as SEQUEL, the Structured English Query Language, a component of an IBM research project called System/R. System/R was a prototype of the first relational database system; it was created at IBM’s San Jose laboratories in 1974, and SEQUEL was the first query language to support multiple tables and multiple users.
As a language, SQL was designed to be “human-friendly”;
most of its commands resemble spoken English, making it easy...
History of JAVA
Java is a general-purpose, concurrent, class-based, object-oriented computer programming language that is specifically designed to have as few implementation dependencies as
possible.
Java code that can run on one platform does not need to be recompiled to run on another.
Java applications are typically compiled to...
Monday, 26 August 2013
What is kernel and shell?
Both
the shell and the kernel are the Parts of a operating system. These Both Parts
are responsible for performing any operation on the system. When a user gives
his Command for Performing Any Operation, then the Request Will goes to the
Shell Parts, The Shell Parts is also called as the Interpreter which translate
the Human Program into the Machine Language and then the Request will be transferred
to the Kernel. So that Shell is just called as...
What is Operating System?
Operating System
We all know that there are many hardware’s and software’s which are attached to a system. So for performing any operations
both software and hardware are compulsory. So...
JAVA : Collections
Collections And Framework
Collections
A Collection is a group of objects .The collection
framework defines several interfaces of
which the collection interfaces
of which the collection ...
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