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Articles on Trending Technologies
Technical articles with clear explanations and examples
Java program to find smallest of the three numbers using ternary operators
To find the smallest from three given numbers using ternary operator, create a temporary variable to store the result of first comparison operation between two numbers. Then, perform second comparison operation between the result of first operation (i.e. temp) and third number to get the final result. Let's understand the problem statement with an example − Example Scenario: Input: nums = 20, 35, 10; Output: res = 10 What is Ternary Operator? The conditional operator in Java is also known as the ternary operator. This operator consists of three operands and is used to evaluate Boolean expressions. The goal ...
Read MoreJava Program to check if the String contains only certain characters
For a given string, say "str", write a Java program to check if it contains each character from a specified character array. If it contains print "found" otherwise "not found". A String in Java is a class that represents a contiguous block of characters. Example Scenario: Input 1: String str = "pqrst"; Input 2: char[] chSearch = {'p', 'q', r'}; Output: res = Character p, q and r found in given string In the string "pqrst", we are searching for the character set {'p', 'q', r'}. Using Iteration Here, use for loop to iterate till the length of the ...
Read MoreJAVA Program to Replace Each Element of Array with its Next Element
As per the problem statement we have to write a Java program to replace each element of the array with its next element. In Java, the array is an object. It is a non-primitive data type which stores values of similar data types. Before discussing the solution for the given problem, let's understand the problem statement with an example − Example Scenario: Input: arr[] = {12, 23, 11, 64} Output: updated array = {23, 11, 64, 12} Algorithm Follow the steps below to replace each element of the array with its next element − Step 1 − Declare ...
Read MoreJava Substring Comparisons
Given a string and its substring(s) of length k, write a Java program to compare and find whether the substrings are equal or not. Substring is a small portion of characters from a large string. In Java, a String is a class that represents a contiguous block of characters. Using compareTo() Method The compareTo() method belongs to the String class of java.lang package. It compares two strings based on the Unicode value of each character contained in the strings. It returns 0 if the specified strings are equal. Example In this example, we are using the compareTo() method to ...
Read MoreJava program to Count the number of digits in a given integer
Suppose an integer number is given as an input, our task is to write a Java program to count the number of digits in that integer. For this problem, create a counter variable and initialize it with 0. Divide the given integer value with 10 till the integer becomes 0 and increment the counter variable for each turn. Using while Loop A while loop in Java is a control flow statement that allows code to be executed repeatedly based on a given Boolean condition. For the given problem, we use this loop to check whether the specified integer value is ...
Read MoreStatic blocks in Java with example
A block of code that is associated with the static keyword is called as static block. This block executes when classloader loads the class. Remember, if your code contains any static block, it will be invoked before the main() method. In this article, we will learn how to create and invoke static blocks in Java along with its use case. But, before that let's understand the static keyword. What is Static Keyword? The static keyword in Java is a non-access modifier. This keyword is used with variables, methods, blocks of code and classes. A class, method or variable declared with ...
Read MoreJava Program to Illustrate Escaping Characters in Regex
The special characters, also known as metacharacters, in Java Regex holds a specific meaning within the regex syntax and must be escaped if you want to use them as regular characters. Here, we will demonstrate escaping characters in Regex through Java Program. But, before diving deep into the topic, let us get familiar with the term Regex in Java. What is Regex? It is an acronym for a Regular expression. It is an API that offers users to define String patterns that are useful for finding, modifying, and editing strings. A couple of areas of strings where Regex is ...
Read MoreJava Interview Questions on Constructors
There could be numerous interview questions on Constructors, it is not possible to cover all in just one article. However, we have researched and assorted the most popular Java interview questions on Constructors. In most of the Java interviews, the interviewers always start by asking basic questions. They can test one's knowledge in just a few minutes of the interviews. Therefore, it is essential to get thorough with the fundamental concepts of Java such as class, object and constructor. In Java interviews, the first question one might encounter is to define constructors. So, let's start our discussion with this question. ...
Read MoreHow to click on a link in Selenium with python?
We can click on a link on page with the help of locators available in Selenium. Link text and partial link text are the locators generally used for clicking links. Both these locators work with the text available inside the anchor tags. Link Text: In Selenium a link text is used to hyperlinks on a web page, to create the hyperlinks on a webpage, we can use anchor tag followed by link Text. ...
Read MoreSQL Query to Check if Date is Greater Than Today in SQL
You can handle and manipulate date and time values within a database using SQL queries. You need to filter records based on date comparisons, like checking if a date is greater than today. We will query this using our own sample data as given below. Date Comparisons You can use various comparison operators, like >, =, and CURRENT_DATE; Here, date_column is the field containing the date values you want to compare. “CURRENT_DATE” is a keyword in SQL that represents the current date. Example Consider you have created a table named EVENTS using the CREATE TABLE statement as ...
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