The MVC (Model View Controller) pattern is not unique to Java, not by any stretch of the imagination. You often see it in web designs. the idea is to separate out each object into a 3 tier system, very similar to how you would in a traditional 3 tier system. Controller The controller works on…
The factory design pattern is one of the original design patterns by the Gang of Four. It follows the idea of using implementation of interfaces instead of different classes, and allows you to request a object from the factory. Now design patterns are not specific to a language. You will find that sometimes these patterns…
We’re going to work to remove a list item by swiping left or right. This is a common design pattern you see in lots of apps. Let’s start by creating a basic Flutter app, the way we’ve done before. Then removing the comments and existing widgets so we’re left with a blank app. Building the…
Working with gestures is fairly simple as Flutter was designed to work in the mobile environment. Let’s start by creating a basic Flutter app, the way we’ve done before. Then removing the comments and existing widgets so we’re left with a blank app. The Simplest Gesture – the Tap The onTap() is very similar to…
As mentioned when we talked about three-tier systems, one of the key aspects is keeping elements separated so they can be updated/changed. You may have different User Interfaces, such as Web, Mobile, and even Desktop Applications, which can all co-exist because they call to load info from the business logic server (sometimes called app server)…
If you want to apply an image, you can use the background-image property. The url() takes a string which specifies where the file is located in relation to the CSS document. If it is within a style tag of the document, then it is based upon the location of the web document. Notice how we…
Backgrounds, whether it be an image, a solid color, or even a gradient, are controlled via CSS in HTML5.It is the size of the element, plus the padding, and border. Typically, you will expect to see a background image on a body tag, or other similar large tag. However, you can place them on any…
When developing a Java application which uses a database, you need to consider several things, such as are you developing the Java Application first, or the Database first? Which database are you going to use (Oracle, DB2, SQL Server, MySQL, etc) Regardless, you will need a JDBC driver for your Java application. Most likely this…
