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Java Articles
Page 141 of 450
Java Program to Add Characters to a String
Java Program to Add Characters to a String Java provides different ways to add characters to a string. We can add characters in the beginning or at the end or at any position according to the need. In this article, we are going to see three different approaches to do so: Using '+' operator Using methods of StringBuffer and StringBuilder classes ...
Read MoreJava Program to Check if a given Class is a Local Inner Class
The nested class that is defined inside the body of a method or within a loop, like for and if, is called a local inner class. Before making a Java program to check whether a given class is a local inner class or not, we need to understand the concept of nested classes first. Let's discuss this in detail. Nested Class When we create a class within another class, it is referred to as a nested class. The nested classes share the same scope. It allows the grouping of similar classes and encapsulation (wrapping of similar functionalities in a single unit). ...
Read MoreJava Program to Add the nth Square Series
The sum of the nth squares series is a form of arithmetic progression where the sum of squares is arranged in a sequence with the initial term as 1, and n being the total number of terms. 12 + 22 + 32 + ... + n2 In this article, we will discuss a Java program to add the nth square series. But, before that, let's see an example scenario: Example Scenario: Input: num = 6 Output: sum = 91 It will be calculated as: 12 + 22 + 32 + 42 + 52 + 62 = 1 ...
Read MoreJava Program to Add Two Matrix Using Multi-Dimensional Arrays
For two given matrices, each of size m x n, we need to write a Java program to add them. Amatrix has a row and column arrangement of its elements. A matrix with m rows and n columns can be called as m x n matrix. Individual entries in the matrix are called elements and can be represented by a[i][j], which means that the element a is present at the ith row and jth column. Matrix is an example of multi-dimensional array. In Java, a multi-dimensional array is an array of arrays. It is used to store data within a ...
Read MoreJava Program to Compute Quotient and Remainder
Given an integer a and a non-zero integer d, our task is to write a Java program to compute the quotient and remainder. Quotient can be calculated using the formula "Quotient = Dividend / Divisor" and for remainder, use "Remainder = Dividend % Divisor". When a number, i.e., dividend, is divided by another number, i.e., divisor, the quotient is the result of the division, while the remainder is what is left over if the dividend does not divide completely by the divisor. Example Scenario Suppose our input is - Input1: Dividend = 50 Input2: Divisor = 3 The output ...
Read MoreJava Program to Categorize Taller, Dwarf and Average by Height of a Person
The given task is to categorize Taller, Dwarf, and Average by the Height of a Person. First of all, we need to define tall, dwarf, and average height of a person. Let us assume -A person with a height between 170cm to 195cm is considered taller.If his height is between 150cm and 195cm, he is considered taller.A person whose height is below 150cm is considered a dwarf.If his height is greater than 195cm, he is considered abnormal.Categorizing the Height of a Person in JavaTo categorize the Height of a Person, we need to compare his height with each range specified above. ...
Read MoreHow to print a formatted text using printf() method in Java?
In Java, formatted text refers to those text that has been processed and arranged according to a specific format. According to the article, we will use the printf() method to learn how to print the formatted text. Formatted Text using printf() Method In Java, to print the formatted output or text we have a printf() method. The printf() method allows us to format output to a java.io.PrintStream or java.io.PrintWriter. These classes also contain a method called format() which can produce the same results, so whatever we read here for the printf() method can also be applied to the format() method. ...
Read MoreHow can we read from standard input in Java?
The standard input (stdin) can be represented by System.in in Java. The System.in is an instance of the InputStream class. It means that all its methods work on bytes, not Strings. To read any data from a keyboard, we can use either the Reader class or the Scanner class. Using Reader Class In Java, the Reader class is an abstract class belonging to the java.io package that is used for reading character streams. It is the superclass of all character input streams, such as "BufferedReader", "InputStreamReader", "FileReader", etc. Subclasses of Reader To use the functionality of the Reader class, use its ...
Read MoreHow To Check Whether a Number Is a Fascinating Number or Not in Java?
What is Fascinating Numbers? A Fascinating number is a number if the result of concatenation of the (original) number with its multiples of 2 and 3 contains all the digits from 1 to 9. For example, we have the number 192. Its product with 2 is 384, and with 3 is 576. Now concatenate (don't add) these with the original number: "192" + "384" + "576" = "192384576", which contains all the digits from 1 to 9 exactly once. Here are some other fascinating numbers, suchas: 192, 1920, 2019, 327, etc. Note: For a number to be a fascinating number, ...
Read MoreHow To Check Whether a Number is a Evil Number or Not in Java?
What is Evil Number? In mathematical terms, an Evil number is a number whose binary representation has exactly an even number of 1's present in it. For example, the binary representation of 3 is 0011. So the number 1's is even the number 3 is an evil number. A binary number is a number expressed in the base-2 numeral system, it is also known as the binary numeral system. It is always represented using two digits: 0 and 1. Each digit (0, 1, 2, 3, ...), character (a, A, b, c, D, ...Z), and symbol (@, #, $, ...) used ...
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