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/*
 * StringDemo.java
 *
 * String Handling.
 * - String is fixed and immutable class object.
 * - Strings are stored in Java heap memory.
 * - 
 *
 * Usage:
 *   javac StringDemo.java && java StringDemo

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/*
 * StringBufferDemo.java
 *
 * StringBuffer class Demo.
 *
 * A thread-safe, mutable sequence of characters.
 * A string buffer is like a String, but can be modified.
 * At any point in time it contains some particular sequence of characters,
 * but the length and content of the sequence can be changed through certain method calls.
 *

kenorb

/*
 * ExceptionDemo.java
 *
 * A process of responding to the occurrence, during computation
 * – anomalous or exceptional events requiring special processing.
 *
 * Clauses of Exception Handling
 * 1. try
 *    Program statements which raised exception should be returning try block.
 * 2. catch

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/*
 * ArithmeticException Demo
 *
 * Notes:
 *  - A try block can have one or more catch blocks, or finally block.
 *
 * Usage:
 *   javac Excep1.java
 *   java Excep1
 *   java Excep1 10 2

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/*
 * User Defined Exception Demo
 *
 * 1. Create a class by extending Exception class
 * 2. Write a parameterized constructor.
 * 3. Override the toString() method.
 *
 * Usage:
 *   javac UserExceptionDemo.java
 *   java UserExceptionDemo 2 10 

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/*
 * UnreportedException Demo
 *
 * Usage:
 *   javac UnreportedExceptionDemo.java
 *   java UnreportedExceptionDemo
 */
class UnreportedExceptionDemo {
  public static void main(String[] args) throws ClassNotFoundException {
  // public static void main(String[] args) { // error: unreported exception ClassNotFoundException; must be caught or declared to be thrown

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/*
 * File Handling Demo
 *
 * Is all about reading and writing activities over file system (java.io).
 * Streams provide communication channels between communication participants.
 *
 * Type of stream classes:
 *   * Byte Stream classes:
 *     - do not support Unicode
 *   * Character Stream classes:

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/*
 * Serialization Demo
 *
 * Serialization is a process of writing a state of an object to a ByteString.
 * Deserialization is a process of reading state of an object from a file.
 *
 * Notes:
 *  - Only objects of class which implements the serializable interface can be serialized.
 *
 * Usage:

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/*
 * JDBC API Demo
 *
 * JDBC (Java Database Connectivity API) provides several classes and interfaces
 * that enables java applications to communicate with the backend system.
 *
 * JDBC Architecture
 * Java Application -> Driver Manager -> Available drivers (MySQL Driver, Oracle, SQL Server).
 *
 * All the java applications should follow the standard steps such as:

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/*
 * JDBC API Demo 2
 *
 * PreparedStatement is pre-compiled statement and activites include:
 *  - load the query
 *  - parse the query
 *  - execute the query
 *  - save the query
 *
 * Usage: