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History and Evolution of ATA The Advanced Technology Attachment (ATA) standard was first introduced in 1986 as a replacement for earlier hard drive interfaces. ATA, also known as IDE (Integrated Drive Electronics), enabled hard drives to be connected directly to the motherboard, improving data transfer rates and simplifying computer design. Over the years, ATA evolved to support faster data transfer rates, larger storage capacities, and new features such as SMART (Self-Monitoring, Analysis, and Reporting Technology) for monitoring hard drive health. In the mid-2000s, ATA was largely replaced by Serial ATA (SATA) as the dominant hard drive interface, although ATA ... Read More
The java.lang.Runtime class is a subclass of Object class, can provide access to various information about the environment in which a program is running. The Java run-time environment creates a single instance of this class that is associated with a program. The Runtime class does not have any public constructors, so a program cannot create its own instances of the class. A program must call the getRuntime() method to get a reference to the current Runtime object. The important methods of Runtime class are addShutdownHook(), exec(), exit(), freeMemory(), gc(), halt() and load(). Syntax public class Runtime extends Object Example public class RuntimeTest { ... Read More
A static variable gets created at the time of class loading even before the execution of a static block and the purpose of the static block is to assign value to the static variables. A static variable stores a value that is shared between all instances of the class it is defined in and a static block is a section of code that gets executed when class is first loaded. If we want any logic that needs to be executed at the time of class loading that logic needs to place inside the static block so that it will be executed ... Read More
An interface cannot implement another interface in Java. An interface in Java is essentially a special kind of class. Like classes, the interface contains methods and variables. Unlike classes, interfaces are always completely abstract. An interface is defined just like a class except for the keyword interface in place of a class, the variables are declared in an interface are static and final and the methods are defined in an interface are public abstract methods. An interface can extend any number of interfaces but one interface cannot implement another interface, because if any interface is implemented then its methods must be defined and ... Read More
Yes, we can declare an abstract class with no abstract methods in Java. An abstract class means that hiding the implementation and showing the function definition to the user. An abstract class having both abstract methods and non-abstract methods. For an abstract class, we are not able to create an object directly. But Indirectly we can create an object using the subclass object. A Java abstract class can have instance methods that implement a default behavior. An abstract class can extend only one class or one abstract class at a time. Declaring a class as abstract with no abstract methods means that we don't allow it ... Read More
In this article we are going to learn about execute a script when the element is finished loading in HTML. When an object is loaded, the onload event takes place. Onload is most frequently used in the element to run a script after a web page has loaded all of its content completely. This can be utilised for a number of things, such as checking for cookies or setting the appropriate version of the page based on the user's browser. Let’s dive into the article to understand more about executing a script when the element is finished loading in ... Read More
The HTML DOM Input range disabled property is used for setting or returning if the range slider should be disabled or not. It uses boolean values with true representing the range slider should be disabled and false otherwise. The disabled property is set to false by default. However, the disabled element is greyed out by default and unclickable. Syntax Following is the syntax for − Setting the disabled property − rangeObject.disabled = true|false; Here, true=range slider is disabled and false the range slider is not disabled. It is false by default. Example Let us look at an example for the ... Read More
The HTML DOM contains() method is used to find whether a node is the descendant of the specified node. A descendant can be an immediate child of the node, grandchild and even great-grandchild. It returns a boolean true indicating the node is indeed the descendant of the specified node and false if it isn’t the descendent of the given node. Syntax Following is the syntax for the HTML DOM contains() method − node.contains(givenNode) Here, the givenNode is a mandatory parameter value that specifies if the givenNode is being contained by the node. Example Let us look at an example for ... Read More
To set the coordinates of the area in an image map, Use the cords attribute in HTML to set the coordinates of the area in an image map in HTML.ExampleYou can try to run the following code to implement the cords attribute − HTML coords attribute
In order to change colour of image drawn on an HTML5 Canvas element, you can try to run the following code. Use the drawImage() method − Example: Code to change color of image function display(img1, red, gr, bl) { //func to change color of image var canvas1 = document.createElement('canvas');//canvas element initialisation canvas1.width = img.width;//canvas width initialisation canvas1.height = img.height; //canvas height initialisation var ctx1 = canvas1.getContext('2d'); ctx1.drawImage(img, 0, 0); var myImg =ctx1.getImageData(0, 0, canvas1.width, canvas1.height); for (var t=0;t< myImg.data.length;t+=4) { myImg.data[t]= red | myImg.data[t]; ... Read More