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Author Archives: Katerina Zamani

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Katerina has graduated from the Department of Informatics and Telecommunications in National and Kapodistrian University of Athens (NKUA) and she attends MSc courses in Advanced Information Systems at the same department. Currently, her main academic interests focus on web applications, mobile development, software engineering, databases and telecommunications.

Java JSON parser Example

In this post, we feature a comprehensive Java JSON parser Example. JSON is simply a text format that facilitates reading and writing. It is a widely used data-interchange language because of its parsing and its generation is easy for machines. In Java language, there are many ways for JSON processing. 1. JSON Parsers In this section, we will see four ...

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Hashmap Java Example (with video)

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Java HashMap is a member of the Java Collection Framework and is a very common way to collect and retrieve data. HashMap represents a data structure that offers key-value pairs storing, based on hashing. HashMap Methods provided, allow you to add, modify and remove elements when needed. In this example, we are going to show how we can create a ...

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Convert int to string Java Example (with video)

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Integer to String conversion is a basic task in many Java projects. There are many ways to convert int to string in java, where some of them are very simple. In this example, we will show all the possible ways via an example on Java convert int to string. You can also check this tutorial in the following video: String ...

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String to Int Java Example (with video)

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In this post, we feature a comprehensive article on how to convert in Java a String to Int. We will also see examples of the parseInt and the valueOf Java methods. String to Integer conversion is a frequently used procedure because String and Integer are very common data types. In this example, we are going to show two different ways ...

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Android Styles and Themes Example

Android gives us the opportunity to specify the format and the design of View components or screens of our app, by declaring some characteristics such as color, margin, text size etc. This is happening via a Style, which is a XML resource and it is separate from XML layouts. It isn’t wrong to say that a style is the Android’s ...

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Android Event Handling Example

Events represents a response to user’s interaction with input controls, such as press of a button or touch of the screen. Android framework places each occurring Event into a queue, which is based on FIFO (first-in first-out) logic. When an Event happens an Event Listener, which is involved with the View object, should be registered. Then, the registered Event Listener ...

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Android User Interface Controls Example

Input Controls are the View components in the user interface that the user can interact with. You can add as many as you want in your application, by declaring the appropriate XML elements in a XML layout file, which is placed in the res/layout directory of your project. In this example we are going to show the most common controls ...

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Android User Inteface Layout Example

Android Layout is a user interface for an Activity or a widget in an application, that handles the appearance of the UI components on the screen. You can specify Layouts with two ways: Declare an XML file in res/layout directory and then load it to your Activity or app widget. Android provides us XML vocabulary, which consists screen elements. Declare ...

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Publish Android Application Example

After the implementation of an Android application, the last step is to publish your app in order to be available to the users. You can sell your app or release it for free via an Android application  marketplace (like Google Play), via your website or even by distribute it directly to the users. In this example we will show how ...

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Android Bluetooth Example

If we want to exchange data between different devices through our application, Bluetooth is a way for wirelessly connection between devices that support Bluetooth. Android system provides us Bluetooth APIs, from which we can: Find paired Bluetooth devices Search for other Bluetooth devices Connect to one or more of these devices Receive and Transfer data In our example we are ...

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