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Object Oriented Programming Articles
Page 360 of 589
Java program to find the area of a square
Given a square whose length of all its sides are l, write a Java program to find its area. A square is a rectangle whose length and breadth are same. Therefore, area of this type of rectangle is the square of its length. To calculate the area of square in Java, you simply need to multiply the given length of square with the length itself and store the result in another variable. Java Program to Find The Area of a Square A Java program that illustrates how to find the area of the square is shown below − public class ...
Read MoreJava Program to Print the Months in Different Formats
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 MoreJava 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 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 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 MoreJava program to find missing and additional values in two lists
In this article, we will learn to find missing and additional values in two lists in Java. By the end of this program, you'll be able to detect elements that exist in one list but not in the other, helping you better manage and analyze data in list comparisons. Problem Statement Write a program in Java to find missing and additional values in two lists. Below is the demostration − Input 101, 90, 34, 34, 67, 90 Output The missing element is : 101The new element in the list is : 67 Steps to find missing and additional values in two ...
Read MoreJava program to create a HashMap and add key-value pairs
In this article, we will write a Java program to create a HashMap and add key-value pairs. We will be using the HashMap class we can import HashMap class form java.util package. A HashMap is a collection that stores data in the form of key-value pairs, allowing quick retrieval of values based on their keys. We'll also see how to display the elements stored in the HashMap using an iterator in our given program. Problem Statement Write a program in Java to create a HashMap and add key-value pairs − Output Belt: 600Wallet: 700Bag: 1100 Steps to create a HashMap and add ...
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