Selenium is a well-known open source, web-based automation tool used by many. But sometimes it faces problems when interacting with certain elements; perhaps an unexpected pop-up window will hinder the web-driver from performing operations and generate wrong results. This is where JavascriptExecutor proves to be a key factor in such a situation, enabling the web driver to successfully perform the desired operations. Its complexity and bursts, working side by side, make this situation much easier to tackle. What is JavascriptExecutor in Selenium? Using the interface named JavascriptExecutor one can execute JavaScript via Selenium and to interact with HTML within a ... Read More

The javap tool is a useful means of retrieving the information of a specific class or interface. Through its capabilities of disassembling, the javap command—also known as the Java Disassembler—has been given the roles of providing users with comprehensive internal info. From the two options, -c or -verbose, each giving unique results, users are able to find themselves in the realms of byte code and byte code orchestration. If no options are used, javap runs through the public, protected and package fields and methods of inputted classes. Syntax javap [option] [classname] When no options are used Example javap class_name ... Read More

A stream made up of the items of this stream that meet the specified predicate is returned by the stream filter function. It is a middle level operation. These actions are always lazy, I.e., running a filter function or other intermediary operations doesn’t really filter anything; instead, it generates a new stream that, when traversed, includes the items of the initial stream that satisfy the provided predicate. Syntax Stream filter(Predicate

It is used to describe that the Java Source Code file must follow a scheme or structure. The maximum number of classes that may be declared as public in a Java program is one. If a public class exists, the program’s name and the name of the public class must match for there to be no compile time errors. There are no limitations when using any name as the name of the Java source file if there is no public class. In this article, we will see some instructions that a Java program must follow. Structure of Java Program ... Read More

Java sound is a bunch of classes and interfaces. It is a low-level API which is used for effecting and controlling the input and output of sound media and Musical Instrument Digital Interface (MIDI) data. It offers explicit control over the capabilities generally needed for sound input and output, in a framework that promotes extensibility and flexibility. It consists of two packages namely, javax.sound.sampled and javax.sound.midi. Who is the Java Sound API designed for? The Java Sound API satisfies the requirements of a broad spectrum of application developers because sound is such a crucial component. Possible application domains comprise − ... Read More

An object that is utilized both during pre- and post- processing phases of a request is a filter, input validation, server-side logging, authentication and permission, among other duties are frequently filtered using filters. The entry is supplied in the web.xml file since the servlet is pluggable. The filter is automatically turned off if the item is removed from the web.xml file. In order to produce a filter, it has to implement javax.servlet. Servlets are extremely portable because they are built in the highly portable Java Language and follow a standard foundation. As a result, it makes it possible to develop ... Read More

Java AWT (Abstract Window Toolkit) is a versatile package that contains all the classes required for creating user interfaces and painting graphic images. Buttons and scrollbar-like entities are called components in the AWT terminology. The Component class is the root of all the AWT components. Events are triggered in some components when a user interacts with them. The AWTEvent class and its subclasses represent the events that AWT components are capable of firing. In AWTEvent, the AWT event model is explained. A container is a component that may also include other components and containers. Another choice for a container is ... Read More

Java Tricky Output Questions that are difficult to answer call for more work to be put into them. We will fall short if we attempt to respond to a challenging topic using common sense since such questions need specialized understanding. The majority of challenging java problems are based on perplexing ideas like loops, multi-threading, overloading, overriding, etc. Even when a question isn’t particularly challenging, we occasionally have trouble solving it. Despite the fact that the answer to the question is straightforward, we occasionally write code carelessly. Even if we don’t know the solution, we can still use analytical thinking ... Read More

Java.lang.VerifyError is a runtime error which is ceated by JVM(Java virtual machine). During runtime a verification process happens to check the validity of loaded . class files, and if .class file violates any constraint then JVM will give Java.lang.VerifyError error. The following error is present in Java 1.0 version and onwards. java.lang.LinkageError extends Java.lang.VerifyError which refers to when there is a problem with the linking process of the program. Java.lang.VerifyError in the output will be look like: Exception in thread "main" java.lang.VerifyError: (class: com/example/Way2Class, method: myMethod signature: ()V) Incompatible argument to function at com.example.MyClass.main(MyClass.java:10) This ... Read More

Sorting in data structures means to rearrange the given list of elements or a certain array, according to the question or precisely the given operator. This operator decides the new order of the elements. An array is a collection of certain elements that can be anything which takes up the adjacent memory locations.Here we store multiple elements of the same type together. Sorting helps us to rearrange these elements. For example, 15, 8, 12, 28 are elements of an unsorted array and after sorting, 28, 15, 12, 8 become a sorted array with descending order. This article will demonstrate how ... Read More