Solutions and tutorials for IT&C development
Two important concept of Object Oriented Programming is to separate entities based on their functionality or logic and to hide data and behavior within a class (encapsulation). For that you have classes used to define entities that have attributes and a behavior (their methods). At a higher level, for a good organization of the application […]
Read More →Service Pack 1 for Windows 7 (and Windows Server 2008 R2) is now available. The update can be downloaded from here: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=c3202ce6-4056-4059-8a1b-3a9b77cdfdda&displaylang=en. It can be also downloaded via Windows Update.
Read More →C++ is not a pure object oriented programming language (this topic is just another argument) but it is implementing OOP concepts. On of these concepts is encapsulation: the object hides its contents (attributes or instance variables) by making them private / protected and gives access to them through public methods (like getters and setters).
Read More →Immutable objects are objects that don’t change their value once they are created. The most known immutable object in Java is String. Besides String, there is another immutable object, and this is Integer (the class and not the primitive) which has an interesting behavior for values between -128 and 127 .
Read More →The most used data types for variables in any programming language are boolean values, numeric primitive values and “strings” (or arrays) of characters. In contrast with C or C++, in Java handling strings is different because: in Java every char is a 16 bit Unicode value, and not 1 byte; in Java, strings values are […]
Read More →Many compiler errors are generated because programmers don’t have a clear image on how long variables are available and when they can access them. The variable scope concept describes the life of a variable, or its availability area, after it was defined.
Read More →Because there are many users that have wide screens or ones with a high resolution, sometimes it is more efficient to work with multiple Microsoft Excel worksheets that are opened at once. By default, every time you open a new spreadsheet Excel creates a new window for each one. In this case, you must switch […]
Read More →Since the first days of computer programs, one important performance issue was the and still is the amount of used memory. Despite the fact that today the hardware technology provide large amounts of Random Access Memory, software developers must pay attention to how they manage the application memory because they can implement wrong solutions that […]
Read More →In order to have a deep understanding of the Object Oriented Programming in Java or any other OOP language (like C#) you must know how things are managed internally by the Java process and by the JVM. Of course Java syntax and Java implementations of OOP principles are important but you will have a more […]
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