The top 20 places to learn Java in 2019

You can learn Java online in many places. Each learning platform suits different learning styles and knowledge levels. The courses consist of Java tutorials, video lectures, code examples, interactive exercises, quizzes, Q&A forums, and web-based projects in various combinations.

Our comprehensive Java learning guide is part of our mission to help developers create high-quality and error-free applications. If you find the platform that best fits your interests and needs you will learn Java in a much more effective (and fun) way.

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The top 20 places to learn Java in 2019

Seat Reservation With Jquery And Php

Seat Reservation with jQuery

In my Online Bus Reservation System project, I got queries from many people about how to implement seat selection screen effectively. So, I decided to write on it. This post explains how to implement seat booking with jQuery. It can be used in online Bus, flight, hotel, exam support, cinema and ticket booking system.

 

seat reservation jquery

HTML:

<h2> Choose seats by clicking the corresponding seat in the layout below:</h2>

    <div id="holder">

        <ul  id="place">

        </ul>   

    </div>

    <div style="float:left;">

    <ul id="seatDescription">

        <li style="background:url('images/available_seat_img.gif') no-repeat scroll 0 0 transparent;">Available Seat</li>

        <li style="background:url('images/booked_seat_img.gif') no-repeat scroll 0 0 transparent;">Booked Seat</li>

        <li style="background:url('images/selected_seat_img.gif') no-repeat scroll 0 0 transparent;">Selected Seat</li>

    </ul>

    </div>

        <div style="clear:both;width:100%">

        <input type="button" id="btnShowNew" value="Show Selected Seats" />

        <input type="button" id="btnShow" value="Show All" />          

        </div>

We will add seats in “#place” element using javascript.

Settings:

To make it generalize, settings object is used.

var settings = {

               rows: 5,

               cols: 15,

               rowCssPrefix: 'row-',

               colCssPrefix: 'col-',

               seatWidth: 35,

               seatHeight: 35,

               seatCss: 'seat',

               selectedSeatCss: 'selectedSeat',

               selectingSeatCss: 'selectingSeat'

           };

rows: total number of rows of seats.
cols: total number of seats in each row.
rowCssPrefix: will be used to customize row layout using (rowCssPrefix + row number) css class.
colCssPrefix: will be used to customize column using (colCssPrefix + column number) css class.
seatWidth: width of seat.
seatHeight: height of seat.
seatCss: css class of seat.
selectedSeatCss: css class of already booked seats.
selectingSeatCss: css class of selected seats.

Seat Layout:

We will create basic layout of seats.

var init = function (reservedSeat) {

                var str = [], seatNo, className;

                for (i = 0; i < settings.rows; i++) {

                    for (j = 0; j < settings.cols; j++) {

                        seatNo = (i + j * settings.rows + 1);

                        className = settings.seatCss + ' ' + settings.rowCssPrefix + i.toString() + ' ' + settings.colCssPrefix + j.toString();

                        if ($.isArray(reservedSeat) && $.inArray(seatNo, reservedSeat) != -1) {

                            className += ' ' + settings.selectedSeatCss;

                        }

                        str.push('<li class="' + className + '"' +

                                  'style="top:' + (i * settings.seatHeight).toString() + 'px;left:' + (j * settings.seatWidth).toString() + 'px">' +

                                  '<a title="' + seatNo + '">' + seatNo + '</a>' +

                                  '</li>');

                    }

                }

                $('#place').html(str.join(''));

            };

            //case I: Show from starting

            //init();

            //Case II: If already booked

            var bookedSeats = [5, 10, 25];

            init(bookedSeats);

 

init method is used to draw seats layout. Already booked seats array will be passed as argument of this method.

Seat Selection:

?

$('.' + settings.seatCss).click(function () {

if ($(this).hasClass(settings.selectedSeatCss)){

    alert('This seat is already reserved');

}

else{

    $(this).toggleClass(settings.selectingSeatCss);

    }

});

$('#btnShow').click(function () {

    var str = [];

    $.each($('#place li.' + settings.selectedSeatCss + ' a, #place li.'+ settings.selectingSeatCss + ' a'), function (index, value) {

        str.push($(this).attr('title'));

    });

    alert(str.join(','));

})

$('#btnShowNew').click(function () {

    var str = [], item;

    $.each($('#place li.' + settings.selectingSeatCss + ' a'), function (index, value) {

        item = $(this).attr('title');                  

        str.push(item);                  

    });

    alert(str.join(','));

})

When user clicks on available seat, it is selected and second click on same seat will unselect seat. Button “Show All” will show all booked seat numbers and “Show Selected Seats” will show selected seats only.

CSS:

?

#holder{   

height:200px;   

width:550px;

background-color:#F5F5F5;

border:1px solid #A4A4A4;

margin-left:10px;  

}

#place {

position:relative;

margin:7px;

}

#place a{

font-size:0.6em;

}

#place li

{

 list-style: none outside none;

 position: absolute;  

}   

#place li:hover

{

background-color:yellow;     

}

#place .seat{

background:url("images/available_seat_img.gif") no-repeat scroll 0 0 transparent;

height:33px;

width:33px;

display:block;  

}

#place .selectedSeat

{

background-image:url("images/booked_seat_img.gif");         

}

#place .selectingSeat

{

background-image:url("images/selected_seat_img.gif");       

}

#place .row-3, #place .row-4{

margin-top:10px;

}

#seatDescription li{

verticle-align:middle;   

list-style: none outside none;

padding-left:35px;

height:35px;

float:left;

}

In my next post, you will get how to use this in asp.net project with sql server database .
https://www.pakainfo.com/seat-reservation-with-jquery-and-php/

Seamus  Quitzon

Seamus Quitzon

1602637135

Learning by Doing: How to Learn Java Basics by Building Your Own Project

Java is not the hardest language to start with. So, it becomes way popular among novice developers joining the ranks of Java coders every single day. If you are reading this blog post, you might be interested in learning Java.

Java is widely used across industry, and especially in the area of Enterprise software, which results in many high paying job opportunities and makes this programming language a common language for newbies. A general promotion of it within colleges and other institutions providing a formal Computer Science education also contributes to its popularity.

However, these are not the only advantages of Java — among other things, it allows you to adopt good practices and makes it way easier to learn other languages in the future. And with no doubt, you can easily learn it if you’re following the right approach. In this post, I am going to share some of them with you.

The Importance of Practice in Programming

Beyond all doubt, practice is important and valuable. But, before we get to the advantages of hands-on experience, I want to draw your attention to one essential thing I often tell my students.

New programmers who are just learning and start implementing things, without being supervised, often end up adapting bad practices. To avoid that, especially when you are making your first steps in programming, I recommend looking for a person who will supervise you and teach you. A strong mentorship with someone engaged in a serious project, as well as communication within the community in the form of sharing code and asking for feedback, is worth the effort. Similarly, when you are applying for your first job, you want to be looking for a company with a strong team and a good leader who would be keen on investing into your learning.

Now, let’s return to practical experience. Learning by doing is different from learning by passively consuming the information. To make sure we can use all the newly acquired technology, we should put our skills to test and write tons of code. The benefits of hands-on experience are almost endless.

Efficiency and Productivity

By practicing, you get a clear understanding of what programming is. Consequently, you start doing better with each new hands-on task, complete it faster, and thus become more productive.

Even if you are not working on real-world projects yet, it’s important to get used to having deadlines. They are inextricably linked to the programming process. My recommendation is to set up your own deadlines while practicing stage and follow them as closely as possible.

#java #learn java #java code #learn java in easy way #learn java course #learn java development

Tyrique  Littel

Tyrique Littel

1600135200

How to Install OpenJDK 11 on CentOS 8

What is OpenJDK?

OpenJDk or Open Java Development Kit is a free, open-source framework of the Java Platform, Standard Edition (or Java SE). It contains the virtual machine, the Java Class Library, and the Java compiler. The difference between the Oracle OpenJDK and Oracle JDK is that OpenJDK is a source code reference point for the open-source model. Simultaneously, the Oracle JDK is a continuation or advanced model of the OpenJDK, which is not open source and requires a license to use.

In this article, we will be installing OpenJDK on Centos 8.

#tutorials #alternatives #centos #centos 8 #configuration #dnf #frameworks #java #java development kit #java ee #java environment variables #java framework #java jdk #java jre #java platform #java sdk #java se #jdk #jre #open java development kit #open source #openjdk #openjdk 11 #openjdk 8 #openjdk runtime environment

Samanta  Moore

Samanta Moore

1621826659

Important Things For Java Developers To Learn In 2021

If you are looking to learn Java, you may be wondering where to start. Which technologies should you focus on? Whether you are new to the language, a middle-level learner, or already using Java at work, this article explores the essentials that you need to know.

Learning a programming language is a technological process that requires serious preparation. Otherwise, you can easily “choke” on the learning process itself.

I work for a company that created an interactive Java online course. From time to time, our graduates tell us about what they are required to know in interviews, and also about what technologies they use in their work. Based on these surveys, a shortlist of such technologies can be compiled.

#java #java-development #learn-to-code-java #tech-trends #learn-java #learning #learning-to-code #education

Samanta  Moore

Samanta Moore

1623803640

Top Tips for Learning Java Programming

If you’re here for the top tips, we assume you’re ahead of the “how to learn Java” part and already boarded on your flight of learning Java. In this lesson, apart from just throwing some do’s and don’ts, we’ll be asking some basic questions that will help you align your path with what’s best for you.

Are you following a plan?

Determining your goal and creating a learning strategy is more significant than you can probably think of. Your ambition, execution, and consistency can make or break your career. So if you want to become a full-time Java Developer shadowing a layout/map goes without saying.

Are you a master of the basics?

Mastering the basics doesn’t necessarily mean learning syntax by heart and not be able to do anything with it. It actually means you’re comfortable working with keywords, know the language protocols, smartly use variables and loops. Know how to choose a data structure depending upon a certain problem. Able to implement object orient approach, since Java is an object-oriented language. Understand encapsulation and how to tamper with it. With this much content freely available widely on the web, newbies are most likely to fell prey to learn more in a shorter period of time. However, you need to understand you can’t build a sustainable building over a weak foundation. Hence, it’s forever helpful to give due time to all the concepts in order to truly “master” them.

#java #learning java programming #java programming #top tips #top tips for learning java programming #programmers