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How to Create Inheritance in JAVA

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In this article, you will learn How to Create Inheritance in  JAVA . Example:- class Vehicle { protected String brand = "Samsung"; public void honk() { System.out.println("Mobile, LED!"); } } class Car extends Vehicle { private String modelName = "Galaxy"; public static void main(String[] args) { Car myFastCar = new Car(); myFastCar.honk(); System.out.println(myFastCar.brand + " " + myFastCar.modelName); } }  
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How to Create Polymorphism in JAVA

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  In this article, you will learn How to Create Polymorphism in  JAVA . Example:- class Animal { public void animalSound() { System.out.println("The animal makes a sound"); } } class Pig extends Animal { public void animalSound() { System.out.println("The pig says: wee wee"); } } class Dog extends Animal { public void animalSound() { System.out.println("The dog says: bow wow"); } } class MyMainClass { public static void main(String[] args) { Animal myAnimal = new Animal(); Animal myPig = new Pig(); Animal myDog = new Dog(); myAnimal.animalSound(); myPig.animalSound(); myDog.animalSound(); } }
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How to use File Open or Read in PHP

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In this article, you will learn How to use File Open or Read in PHP. A method to open file in PHP fopen() function. This function provides you many options than the readfile() function. We can use the type of file with this function. AJAX = Asynchronous JavaScript and XML CSS  = Cascading Style Sheets HTML = Hyper Text Markup Language PHP = PHP Hypertext Preprocessor SQL  = Structured Query Language SVG = Scalable Vector Graphics XML = EXtensible Markup Language Example:- index.php <?php $myfile = fopen("file.txt", "r") or die("Unable to open file!"); echo fread($myfile,filesize("webdictionary.txt")); fclose($myfile); ?> file.txt Welcome to Hub of Tutorials  
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How to Generate PDF from MySQL Database

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In this article, you will learn How to Generate PDF from  MySQL  Database. Example:- Table of Employees CREATE TABLE IF NOT EXISTS `employee` ( `EmpId` int(11) NOT NULL, `EmpName` varchar(200) DEFAULT NULL, `EmpDepartment` varchar(200) DEFAULT NULL, `EmpRegDate` timestamp NULL DEFAULT CURRENT_TIMESTAMP ) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=latin1; INSERT INTO `employee` (`EmpId`, `EmpName`, `EmpDepartment`, `EmpRegDate`) VALUES (1, 'Amandeep Singh', 'Designing', '2017-03-18 11:37:00'), (2, 'Baljit Singh ', 'HR', '2017-06-12 06:32:11'), (3, 'Deepak', 'Tester', '2017-02-13 02:42:39'), (4, 'Gurtej Singh', 'Designing', '2018-05-15 05:28:36'), (5, 'Jaspreet Kaur', 'Development', '2018-04-19 06:12:00'), (6, 'Sachin Sharma', 'Graphics Designer', '2018-11-11 02:31:00'); ALTER TABLE `tblemployee` ADD PRIMARY KEY (`EmpId`); ALTER TABLE `t
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How to Maintain Password History Using PHP and Mysql

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In this article, you will learn How to Maintain Password History Using PHP and M ysql.  In this user change their password can’t reuse. New Password should not be the same as any of the previous 3 Passwords. In this tutorial having three pages db.php index.php change_password.php db.php <?php define('DB_HOST','localhost'); define('DB_USER','root'); define('DB_PASS',''); define('DB_NAME','pwdhistory'); try { $dbh = new PDO("mysql:host=".DB_HOST.";dbname=".DB_NAME,DB_USER, DB_PASS,array(PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES 'utf8'")); } catch (PDOException $e) { exit("Error: " . $e->getMessage()); } ?> index.php <?php session_start(); error_reporting(0); include('db.php'); if(isset($_POST['submit'])) { $fullname=$_POST['fname']; $email=$_POST['email']; $password=md5($_POST['password']); // Code for check email avail
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How to Create CSS Image Sprites

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In this article, you will learn How to Create  CSS   Image  Sprites. Example:- <html> <head> <title>CSS Image Sprites</title> <style> #navlist { position: relative; } #navlist li { margin: 0; padding: 0; list-style: none; position: absolute; top: 0; } #navlist li, #navlist a { height: 44px; display: block; } #home { left: 0px; width: 46px; background: url('home.png') 0 0; } #prev { left: 63px; width: 43px; background: url('pre.png') -47px 0; } #next { left: 129px; width: 43px; background: url('next.png') -91px 0; } </style> </head> <body> <ul id="navlist"> <li id="home"><a href="https://huboftutorials.com/"></a></li> <li id="prev"><a href="https://huboftutorials.com/category/jquery"></a></li> <li id="next"><a href="https://huboftutorials.com/cascadin
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How to Create an Invoicing system in PHP

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In this article, we will explain How to Create an Invoicing system in PHP. the invoice will be  inserted  into the database. Example:- form.php <?php error_reporting( error_reporting() & ~E_NOTICE ); $item3=$_POST['item10']; $quantity3=$_POST['qty10']; $price3=$_POST['price10']; $item3=$_POST['item9']; $quantity3=$_POST['qty9']; $price3=$_POST['price9']; $vat=$_POST['vat']; $total=$_POST['total']; $grand=$_POST['grand']; $amount10=$_POST['amount10']; $amount9=$_POST['amount9']; $insert="insert into invoice set item10='$item10',qty10='$quantity10',price10='$price10',amount10='$amount10', item9='$item9',qty9='$quantity9',price9='$price9',amount9='$amount9', total='$total', vat='$vat', grand='$grand',bal='$grand'"; $result=mysql_query($insert); header("location:index.php"); }
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