Programming Articles - Page 441 of 3363

This article includes the way to read text files line by line in Java. Here, the three different methods are explained with examples. Storing a file in text format is important especially when data from one structured /unstructured form is transferred to another form. Therefore, basic file transfer systems integrate the txt file reading and writing process as their application components. Therefore, how to use text file reading and writing methods is also important for making the parsers. Multiple Approaches The given problem statement is solved in three different approaches − By using the BufferedReader ... Read More

Array is the common way to store similar types of items together in Java. The stored items or values are referred as elements of the array. In this article, we are going to learn how to create an array and print its elements. Printing elements of an array in Java Use the following approaches to print elements of an array − By using for loop By using while loop By using Arrays.toString() method For Loop to Print array elements For loop is used when we know how many times a task needs to be repeated. In this case, ... Read More

In this article, we are going to use various approaches for formatting the months using different libraries of Java programming language. There are several ways to display months. Sometimes the months are written as numbers, sometimes the months are written in long form or they are written in short forms. Using java.time.Month In this approach, the months are printed by specifying the month number that starts from the number 1. For instance -> Month.of(1) will give JANUARY. Example In this Java program, we are printing all 12 months name. import java.time.Month; public class ShowMonth { ... Read More

When working with datasets, it's important to understand characteristics of data. One of most fundamental aspects of a dataset is its central tendency - point around which data tends to cluster. This can be quantified in a number of ways, including minimum, maximum, median, and mean. In this article, we'll explore these different measures of central tendency and show you how to calculate them using a variety of programming languages. What is Minimum of a Dataset? The minimum of a dataset is smallest value in set. This value is useful for understanding lower bounds of data and can help identify ... Read More

Secant method is one of the powerful methods to know the x-intercept (zeros) of a polynomial or any transcendental function. In this method, first we select (basically guess) the interval in which we expect the root ($\mathrm{𝑥_{1}}$, $\mathrm{𝑥_{2}}$). Then we draw a secant line to join the points on the function (A, B) corresponding to the guessed values as shown in the figure below. The secant line intersects the x-axis at the point $\mathrm{𝑥_{3}}$, as $\mathrm{𝑥_{3}}$ and $\mathrm{𝑥_{2}}$ are not close (i.e., their absolute difference is finite) we find the point corresponding to 𝑥3 on the curve i.e., C. ... Read More

In this tutorial, I will show you how to find the roots of an equation with the help of Regula Falsi which is also called as the "False Position Method". Let us consider the figure shown below. First we have searched for two 𝑥 values $\mathrm{x_{1}}$ and $\mathrm{x_{2}}$ at which the value of function ($\mathrm{y_{1}} $and $\mathrm{y_{2}}$) are different, means the points should be such that the products of these two should be negative (i.e. they should lie on the opposite sides of the X-axis). As these are not the exact point i.e. the points at which root exist, ... Read More

In this tutorial, I will show you how to evaluate the roots of a polynomial or transcendental equation with the help of a numerical method known as the Newton Raphson method. This is an iterative method in which we start with a initial guess (of independent variable) and then evaluate the new value of 𝑥 based on the guess. And the process goes on till the convergence is achieved. The method is explained with the help of a diagram as shown below. Based on $x_{g}$ the value of function $(f^{'} \left ( x_{g} \right ))$ is evaluated. Then a ... Read More

Let us first understand some basic concepts and equations based on which the projectile motion can be modelled. The figure shown below explains some basic terminologies of projectile motion. Here, "u" is the velocity with which the projectile is being projected. 𝛼 is the angle of projection of the projectile. The path taken up by the projectile during its flight. Range is the maximum horizontal distance travelled by the projectile. $\mathrm{h_{max}}$ is the maximum height attained by the projectile. Moreover, the time taken up by the projectile to travel the range is called as time of flight. The projectile ... Read More

Introduction Xvfb stands for "X Virtual Frame Buffer" which is used to create a virtual display in memory without any attached physical display device. It allows running graphical applications without any actual graphics hardware. PHP is a server-side scripting language widely used for web development. In this article, we will discuss how we can use Xvfb with PHP to run graphical applications in headless mode. Why do we need Xvfb with PHP? PHP is a server-side scripting language and doesn't provide any direct support for graphics and user interfaces. Most of PHP-based web applications are built on top of popular ... Read More

Qt is a cross-platform application framework that is widely used for developing applications with graphical user interfaces. It is written in C++ and supports a range of programming languages, including Python, Ruby, and Java. One of most useful features of Qt is its support for internationalization, which allows developers to create applications that can be easily localized for different languages and cultures. In this article, we will discuss how to run a Qt app in a different language. Introduction to Internationalization Internationalization, also known as i18n, is process of designing and developing applications that can be easily localized for different ... Read More