Java Programming

STORED PROCEDURE This post is very useful to know about internals of Stored Procedure. JDBC is used for database operations in java and Stored procedures are used for eliminating overhead from Java. Internals of Stored-Procedure will cover all the concepts like What is Stored Procedure, What is procedure, When do people prefer Stored Procedure, Advantages and uses of Stored Procedure, Disadvantage or flaws of Stored Procedures, API of Stored Procedure, Types of Procedure etc… Before knowing about Stored Procedure we should know about What is Procedure? Procedure is nothing, It is a only function or method of database. These database methods contains group of SQL statements. We create procedure using PL/SQL programming. Stored Procedure is nothing but it is one of the most useful mechanism for creating procedure in the database and called by java program is known as Stored Procedure. There is a one big question that When do we prefer using Stored-Procedure? The answer of thi...

Interface Internals in JAVA Little description of java internals about Interface : Some people say, Interface is used to implement the concept of Multiple Inheritance,but purpose of Interface is not implementing the concept of Multiple Inheritance in Java, although it looks like Multiple Inheritance. Apart from this It is very important to know that why do we need Interface? The answer is that, If we know about the entity, but don't know about the behavior then we need Interface. A very simple example of Interface is as follows- interface Animal  {    void eat ();   } class Goat implements Animal   {     Void eat ()       {          System.out.println ("Goat is eating grass");       }   } class Dog implements Animal   {        void eat ( )        {           System....

Java Keywords What is a keyword? Keyword is a special word/reserved word which is already defined in the compiler. We can not use keywords in our program for declaring any variable or program name or in other declarations. Keywords definition is defined in the compiler. For example, If you try to declare a variable with name 'try' that is not possible as 'try' is a keyword in java language. See following example.      class Testpgm  {     int try; //this variable can not be declared....     public static void main (String[] args )       {        //class code....       }    }   Below is lists of all Java keywords- There are 53 keywords in java. 1. 48 special words. 2. 3 special words. 3. 2 unused words. 2 unused keywords ================ 1. goto 2. const 3 reserve words =============== 1. null 2. true 3. false 48 special words ================ keywo...

Job of Java Compiler Before knowing What does Java Compiler do or Job of Java Compiler, You should know What is a compiler? Compiler is a collection of predefined programs which convert source code into machine understandable code. In case of Java Compiler source code is not converted into machine code  directly , It is first converted into Byte code then translated into machine code by JVM . But other compiler directly convert source code into machine code. For ex- 'C' Compiler. Due to this feature of Java, It is a Platform Independent Language . Java has both the Compiler and Interpreter. Compiler converts source code into byte code and the Interpreted i.e. JVM converts byte code into machine code. Job of Java Compiler- 1. Java Compiler loads source code from Hard Disk to RAM. 2. Java Compiler converts source code into Intermediate code if source code is syntactically     correct. 3. Generate Byte Code i.e.  .Class file. Note-   By defaul...

Platform Independence means that no dependency on Platform. Here Platform mean is environment.We will know here Internal mechanism of Platform Independent Language. Learning Java is too easy but understanding it some what difficult. Any one can create programs on java but very few people know the Internal mechanism of java concepts. In this post we are going to discuss about Internal mechanism of Platform Independent Language. As we are discussing on Java and Java is also a Platform Independent Language. So I will explain Internal meaning of Platform Independence and What is the meaning of Platform Independent Language? First of all think only one thing  that can you execute java program made in windows environment on Unix environment or vice versa? If you are unable to answer, I tell you. 'Yes' we can execute java program in any environment. For this only one thing is needed that is called JVM. Java's most powerful feature is that program written in java can we run on an...

Why do we need Stream? As we know that Stream is a sequence of data. So we need need this Stream to access data so that we could do I/O operation on that data. Below are some reasons which will tell us why do we need stream. 1)In order to perform input/output operation ,we need Stream. 2)Without Stream ,we cannot perform input/output operation. 3)To save your output and input in the hard-disk permanently,we need Stream. Example ======= Banking Application(Before came to the concept of database, developer used STREAM for developed bank application or etc).

Internals of File Handling in Java File Handling is a very important topic in java. We can read, write, update files through file handling. It gives us authority to modify files through this mechanism. We will read here internal mechanism of file handling. How files are being read, How Input/Output operation are being performed on file. In order to read about all this we need to understand STREAM. We will discuss here-   * Why do we need Stream?   *What is Stream?   *What is INPUT?   *What is OUTPUT?   *What is Input Stream?   *What is Output Stream?   *What is Byte Stream?   *Why do we need Byte Stream?   *What is Character Stream?   *Why do we need Character Stream?   *How many ways to take Input from keyboard? We will get all answer here while reading all posts. First I would like to tell you concept of File Handling. File Handling- We can  read or write som...