Java Programming

Java Database Connection Database connection in java is very important process in JDBC. This post is for demonstrating internals of java database connectivity. In this post we will get to know How to connect with database in java, Java database connectivity, internals of database connectivity in java. I will also give a sample example of java database connectivity. For database connection we need to import some packages and need to use some special methods. Before getting into deep I will explain about these methods and packages. Following is details of how to connect with database. Step by step explanation of Java database connection- 1. Import Package-   For creating database connection you need some functions and classes. These functions and classes are found in a package so we need to import that package using "import java.sql.*". 2. Loading Driver-   Driver is required for conversion of sql statements into back end database understandable form and vice ve...

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...

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...

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...