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Articles by Alshifa Hasnain
Page 21 of 23
Java Integer compare() method
Integer compare() Method The compare() method in the Integer class is a part of the Java interface and is used to compare two integers. It provides a way to compare two Integer objects or primitive int values and determine their relative ordering. This method is particularly useful when sorting or working with collections that involve integer values. Syntax public static int compare(int x, int y);Where − x: The first integer to be compared. y: The second integer to be compared. Return Value The compare() method returns an integer value that ...
Read MoreJava Program to mark the current position in this input stream
In this article, we will learn to mark and reset the current position in a file input stream in Java. Marking the current position in an input stream is a crucial functionality provided by Java’s InputStream class. It enables developers to reset the stream to a previously marked position, facilitating efficient data handling, especially in scenarios like re-reading or backtracking within a file. Key Concepts Following are the key concepts we need to know to mark the current position in this input stream − InputStream Class: The InputStream class is an abstract class that represents ...
Read MoreJava Program to convert Java Float to Numeric Primitive Data Types
The Float wrapper class provides methods to convert a Float object into various numeric primitive data types like short, int, float, and double in Java. This is particularly useful when handling float values and representing them in different numeric forms.This article will show two approaches to convert a Float object to numeric primitive types using the Float class methods. Using Float Wrapper Class Methods In this approach, we use predefined methods of the Float class, such as shortValue(), intValue(), floatValue(), and doubleValue(), to convert a Float object into various primitive types. These methods directly perform the required conversions. ...
Read MoreJava Program to Perform nCr (rcombinations)
In this article, we'll learn to perform nCr (Combinations) in Java. In mathematics, nCr (combinations) is a crucial concept that helps determine how many ways you can choose r items from a set of n items, without considering the selection order. It is widely used in fields like probability, statistics, and combinatorics. What is nCr? The formula for calculating combinations (nCr) is − nCr = n! / (r! × (n - r)!) Where, n! = The factorial of n (product of all integers from 1 to n). r! = The factorial ...
Read MoreJava Program to get maximum value with Comparator
In Java, the Comparator interface is used to define a custom ordering for objects in various Collections. This can be particularly useful when you need to find the maximum or minimum element based on specific criteria rather than natural ordering. One common use case is finding the maximum value in a collection using a comparator. Java provides the Collections utility class, which includes the max() and min() methods that accept a comparator to perform customized comparisons. In this article, we will explore how to use these methods to find the maximum value from a list using a comparator. Finding Maximum ...
Read MoreJava Program to create a vertical ProgressBar
In this article, we will learn about creating a vertical progress bar using JProgressBar.VERTICAL in Java. Progress bars are essential for tracking task completion in GUI applications, and a vertical orientation can add a unique touch to your design. What is a Progress Bar in Java Swing? A progress bar is a visual component in Java Swing that indicates the progress of a task. It can be horizontal or vertical, depending on the application's design requirements. Java Swing provides the JProgressBar class to create and manage progress bars efficiently. Features of a Vertical Progress Bar The following are features of ...
Read MoreHow to add a new row to JTable with insertRow() in Java Swing
The JTable component in Java Swing is widely used for displaying and managing tabular data. Adding a new row dynamically to a JTable can enhance user interactivity, especially in applications that require real-time data manipulation. In this article we will tell you a step-by-step procedure, to use the insertRow() method to add a new row to a JTable, complete with a sample implementation and an algorithm. What is JTable in Java Swing? JTable is a Swing component used for displaying and editing tabular data. It is highly customizable and supports features like sorting, selection, and dynamic data manipulation, making it ...
Read MoreJava Program to find Product of unique prime factors of a number
In this article, we will learn to calculate the product of the unique prime factors of a given number using Java. Prime factorization plays a crucial role in many mathematical and computational problems, and understanding how to work with prime factors can help you solve complex challenges efficiently. Problem Statement Given a positive integer n, the task is to find the product of the unique prime factors of n. The objective is to calculate the product of all distinct prime factors of n that divide it exactly. Input 68 Output 34 Since the unique prime factors of 68 are 2 ...
Read MoreJava Program for GCD of more than two (or array) numbers
In this article, we will learn to calculate the GCD of more than two numbers in Java. We will discuss two approaches, the recursive method and an optimized approach using the Euclidean algorithm. The Greatest Common Divisor (GCD) of two or more integers is the largest integer that divides all the numbers without leaving a remainder. When it comes to an array of numbers, finding the GCD means determining the GCD of all the elements in the array. Problem Statement Given an array of integers, find the GCD of all the elements.Example −Input {7, 49, 177, 105, 119, 42} Output ...
Read MoreJava Regex to extract maximum numeric value from a string
In this article, we will learn to extract the maximum numeric value from a string using Java’s regex. While Java provides several ways to handle string manipulation, regular expressions (regex) offer a powerful and efficient tool for such tasks. Problem Statement The maximum numeric value is extracted from an alphanumeric string. An example of this is given as follows − Input String = abcd657efgh234 Output Maximum numeric value = 657 Using Java Regex and Pattern Class Java provides the Pattern and Matcher classes to work with regular expressions. The Pattern class compiles a regular expression, and the Matcher class is ...
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