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Articles by karthikeya Boyini
Page 84 of 143
Java program to find whether given character is vowel or consonant
In this article, we will learn to find whether a given character is a vowel or consonant using Java. In the English alphabet, the characters 'a', 'e', 'i', 'o', and 'u' are vowels and the remaining letters are consonants. To find whether the given letter is a vowel or consonant. Using a loop and or operator verify whether the given character is 'a' or 'e' or 'i' or 'o' or 'u' else it is consonant. Steps to find whether given character is vowel or consonant Following are the steps to find whether given character is a vowel or consonant− ...
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 ...
Read MoreJava program to get random letters
In this article, we will learn to write a program in Java to get the random letters in both lowercase and uppercase. We will be using Random class from java.util package.The program will first create random lowercase letters by selecting them from the alphabet, and then it will generate random uppercase letters in a similar way. Problem Statement Write a program in Java to get the random letters both uppercase and lower case. Below is the demostration − Output Lowercase random letters...dlhjsUppercase random letters...BKIZN Step to get random letters Following are the steps to get the random letter using Java ...
Read MoreJava program to calculate distance light travels
In this article, we will demonstrate how to calculate the distance light travels in one year using Java. We will use the Demo class and the main method to perform this calculation. Speed of light: 186000Days = 365dist = speed * seconds Problem Statement Write a Java program to calculate the total distance that light travels in a year, given that the speed of light is 186, 000 miles per second. Output Light travels: 5865696000000 miles Steps to calculate distance light travels Following are the steps to calculate the distance light travels − Initialize the Demo class.Define ...
Read MoreJava program to set a range for displaying substring
In this article, we'll learn how to extract a specific range of characters from a string in Java using the substring() method. The substring(int beginIndex, int endIndex) method gets a part of a string from the beginIndex to just before the endIndex. Problem Statement Given a string, extract a substring from a specified range of indices. Input String: pqrstuvw Output Substring: stu Steps to set a range for displaying substring Following are the steps to set a range for displaying substring − Declare a string str. Initialize the string str with the ...
Read MoreBasic calculator program using Java
In this article, we will learn to create a basic calculator using Java. With a basic calculator, we can add, subtract, multiply, or divide two numbers. This is done using a switch case. A program that demonstrates this is given as follows − Problem Statement Write a program in Java to create a basic calculator for performing the basic arithmetic operations − Input Enter two numbers: 23Enter an operator (+, -, *, /): + Output The result is given as follows:2.0 + 3.0 = 5.0 Steps to create basic calculator Following are the steps to create a basic calculator program using ...
Read MoreJava program to create a new list with values from existing list with Lambda Expressions
In this article, we will demonstrate how to create a new list of employee names from an existing list of Employee objects using Lambda Expressions. We will utilize Java’s Stream API to efficiently map the employee data and collect it into a new list. Lambda Expressions: Lambda expressions simplify functional programming by working with functional interfaces, which have only one method. A lambda expression provides a way to implement this method easily. Steps Following are the steps to create a new list with values from existing list with Lambda Expressions − Import the necessary classes ...
Read MoreJava program to count the number of consonants in a given sentence
In this article, we will count the number of consonants in a given sentence using Java to achieve this, we will use the Scanner class for user input and a for loop to iterate through each character in the sentence. By comparing each character with the vowels a, e, i, o, u, and ignoring spaces, we will identify consonants and increment a counter accordingly. The Scanner class is part of java.util package and is commonly used to obtain input from the user. Problem Statement Given a sentence, write a Java program to count the number of consonants. As given below ...
Read MoreJava program to check for URL in a string
In general, to check if a given string is a valid URL(Uniform Resource Locator), we will create a method that tries to form a URL object and catches any exceptions to determine if the string is a valid URL. By using Java's URL class and exception handling, we will demonstrate a straightforward approach to verify the correctness of URL strings. We can import from java.net package object is created from the input string, then converted to a URI using toURI() method. Problem Statement A program can be created to check if a string is a correct URL or not. An ...
Read MoreJava program to delete duplicate characters from a given String
The Set interface does not allow duplicate elements, therefore, create a set object and try to add each element to it using the add() method in case of repetition of elements this method returns false − If you try to add all the elements of the array to a Set, it accepts only unique elements so, to find duplicate characters in a given string. Problem Statement Given a string, write a program in Java to delete duplicate characters from a given string − Input TUTORIALSPOINT Output Indices of the duplicate characters in the given string :: Index :: ...
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