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Articles by Krantik Chavan
176 articles
Java program to sort string stream with reversed comparator
In this article, we will learn how to sort a stream of strings using a reversed comparator in Java. Java 8 introduced the Stream API, which allows powerful operations like sorting using custom comparators. Java Comparator A Comparator is a functional interface in Java that defines custom sorting logic. It compares two objects and returns a result based on the comparison. Java Stream A Stream is a sequence of elements that can be processed in parallel or sequentially, supporting methods like sorting, filtering, and mapping. Sorting string stream with a reversed comparator The following are the steps for sorting a ...
Read MoreJava program to disable the first item on a JComboBox
In this article, we will learn to disable the first item on a JComboBox using Java. This setup is useful for applications where you want to show a placeholder as the first item and prevent it from being chosen, so users must select a valid option. We will be using JComboBox. JComboBox class The JComboBox class in Java is a useful component that combines a dropdown list with a button or a text field. This lets users pick an option from the list or type their input if editing is allowed. It’s great for creating forms where users can choose ...
Read MoreJava program to get the reverse of an Integer array with Lambda expressions
In this article, we will learn to get the reverse of an Integer array with Lambda expressions in Java. By utilizing the Arrays.sort() method along with a custom comparator defined as a lambda expression, we can efficiently reorder the elements of the array in descending order. Lambda expressions are a concise way to represent functional interfaces, allowing you to write cleaner and more readable code. Problem Statement Write a program in Java to get the reverse of an Integer array with Lambda expressions − Input arr = {20, 50, 75, 100, 120, 150, 170, 200} Output Integer Array elements... 20 50 ...
Read MoreJava program to get date for all the days of the current week
In this article, we will learn to get date for all the days of the current week using Java. We will use the java.time package to get the current date and calculate the dates for the rest of the week based on the current day. Steps to get date for all the days of the current week Following are the steps to get date for all the days of the current week − First we will import the DayOfWeek and LocalDate from java.time and Arrays class from java.util. We will get the current ...
Read MoreJava program to select all the items in a JList
In this article, we will learn how to select all the items in a JList in Java. The program creates a simple graphical user interface with a list of sports. It uses the setSelectionInterval() method to select all items in the list. This ensures that from the first item to the last item in the list, everything is selected when the program runs. Problem Statement Write a Java program to select all the items in a JList. Below is the demonstration of the same − Input sports[]= {"Football", "Fencing", "Cricket", "Squash", "Hockey", "Rugby"} Output Steps to select all ...
Read MoreJava program to get the beginning and end date of the week
In this article, we'll explore how to determine the start and end dates of a week using Java. Specifically, we'll write a program that takes a given date and calculates the Monday and Sunday of that week. Problem Statement Write a Java program to find the beginning (Monday) and end (Sunday) dates of the week for a given date. Input Date = 2019-04-16 Output Start of the Week = 2019-04-15End of the Week = 2019-04-21 Steps to calculate week's start and end dates Following are the steps to get the beginning and end date of the week − ...
Read MoreHow to draw a rounded Rectangle on HTML Canvas?
To draw a rectangle in HTML, use the canvas element. With canvas, use the rect() method to draw a rectangle. But, for creating a rounded rectangle, using the rect() method won’t work. We will be using the lineTo() and quadraticCurveTo() method to create a rounded rectangle.This is how you can create a canvas in HTML5 −You can learn how to create a rounded rectangle in canvasExample HTML5 Canvas Tag var canvas = document.getElementById('newCanvas'); ...
Read MoreUsage of CSS align-content property flex-start value
Use the align-content property with value flex-start to set the flex lines in the beginning.ExampleYou can try to run the following code to implement the flex-start value −Live Demo .mycontainer { display: flex; height: 200px; background-color: blue; align-content: flex-start; flex-wrap: wrap; } .mycontainer > div { background-color: orange; text-align: center; line-height: 60px; font-size: 30px; width: 100px; margin: 5px; } Queue Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8
Read MoreArrow to the top of the tooltip with CSS
Use the bottom CSS property to add arrow to the top of the tooltip.ExampleYou can try to run the following code to add a tooltip with arrow to the top:Live Demo .mytooltip .mytext { visibility: hidden; width: 140px; background-color: blue; color: #fff; z-index: 1; top: 150%; left: 50%; margin-left: -60px; text-align: center; border-radius: 6px; padding: 5px 0; position: absolute; } .mytooltip { position: relative; display: inline-block; } .mytooltip .mytext:after { content: ""; position: absolute; bottom: 100%; left: 50%; margin-left: -10px; border-width: 3px; border-style: solid; border-color: transparent transparent blue transparent; } .mytooltip:hover .mytext { visibility: visible; } Keep mouse cursor over me My Tooltip text
Read MoreCSS Transition property
Use the CSS transition property to set all the four transition properties into a single line. You can try to run the following code to work with the transition property −ExampleLive Demo div { width: 150px; height: 150px; background: blue; transition: height 3s; } div:hover { height: 250px; } Heading One Hover over the below box to change its height.
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