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Articles by AmitDiwan
Page 631 of 840
Java Program to Add the two Numbers
When we enter the coding world there are various mathematical operations that we learn to do through programming languages. We are expected to begin our coding journey with basic mathematical operations like adding, subtracting, multiplying and dividing. To evaluate the sum of two numbers, we use the '+' operator. However, Java also provides other approaches for adding two numbers. This article aims to explore the possible ways to add the two numbers in Java. To add the two numbers in Java, we are going to use the following approaches − By taking input of operands from user By ...
Read MoreJava Program to Compute the Sum of Diagonals of a Matrix
In this article, we will understand how to compute the sum of diagonals of a matrix. The matrix has a row and column arrangement of its elements. The principal diagonal is a diagonal in a square matrix that goes from the upper left corner to the lower right corner.The secondary diagonal is a diagonal of a square matrix that goes from the lower left corner to the upper right corner.Below is a demonstration of the same −Suppose our input is −The input matrix: 4 5 6 7 1 7 3 4 11 12 13 14 23 24 25 50The desired ...
Read MoreImportance of HashSet in Java
The HashSet use Hashing to manipulate data. Let us see an example − Example import java.util.*; public class Demo{ private final String f_str, l_str; public Demo(String f_str, String l_str){ this.f_str = f_str; this.l_str = l_str; } public boolean equals(Object o){ if (o instanceof Demo) return true; Demo n = (Demo)o; return n.f_str.equals(f_str) && n.l_str.equals(l_str); } public static void main(String[] args){ ...
Read MoreHow to easily insert datetime in MySQL?
You can easily insert DateTime with the MySQL command line. Following is the syntax − insert into yourTableName values(‘yourDateTimeValue’); Let us first create a table − mysql> create table DemoTable ( DateOfBirth datetime ); Query OK, 0 rows affected (0.97 sec) Insert some records in the table using insert command − mysql> insert into DemoTable values('1998-01-23 12:45:56'); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable values('2010-12-31 01:15:00'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('2015-04-03 14:00:45'); Query OK, 1 row affected (0.10 sec) Display all records from the table using select statement ...
Read MoreStarting and Stopping MySQL Server
Let us understand how MySQL server can be started and stopped on Linux and Windows −Linux – Start and Stop ServerOn Linux, the start and stop can be done from the command line as shown below −/etc/init.d/mysqld start /etc/init.d/mysqld stop/etc/init.d/mysqld restartLinux – Service CommandsSome Linux types offer service command as well −service mysqld startservice mysqld stop service mysqld restart(or)service mysql startservice mysql stopservice mysql restart Windows – Start and Stop ServerLet us understand how it can be done on Windows −Open 'Run' Window by using Win key + RType 'services.msc'Now search for MySQL service based on the version that ...
Read MoreJava Program for array rotation
An array is a linear data structure that is used to store a group of elements with similar datatypes. It stores data in a sequential manner. Once we create an array we can't change its size i.e. it can store a fixed number of elements. The array comes with a vast application and use case. Also, we can perform numerous operations on arrays. This article will help you to understand the basics of arrays and also, we will make java programs to perform right and left rotation operations on arrays. Java Program for Array Rotation First, let's understand the term ...
Read MoreJava multiplyExact() in Math
In Java, multiplyExact() is an in-built static method of the Math class that accepts two arguments and returns their product as a result. This method can accept values of either integer or long type. One important point to note is that it may throw an exception if the produced result overflows the size of integer. After knowing the functionality of multiplyExact() in Java, one question that may pop into one's mind is that we can also use '*' operator to multiply two operands then why do we need multiplyExact() method. We are going to answer this question and also, explore ...
Read MoreIntUnaryOperator Interface in Java
IntUnaryOperator Interface, a functional interface of Java that performs an operation on a single integer-valued operand and also returns an integer value as a result. Since it is a functional interface, we can use it as an assignment target for the lambda expressions or method references. Here, the functional interface means an interface that contains only a single abstract method and exhibits single functionality. Some examples of functional interfaces are Predicate, Runnable, and Comparable interfaces. The IntUnaryOperator interface is defined in the 'java.util.function' package. In this article, we are going to explore the IntUnaryOperator Interface and its built-in methods with ...
Read MoreHow to calculate local time in Node.js?
In this article, you will understand how to calculate local time in Node.js. The Date object works with dates and times. Date objects are created with new Date(). JavaScript will use the browser's time zone and display a date as a full text string. Node.js is an open-source and cross-platform JavaScript runtime environment.As an asynchronous event-driven JavaScript runtime, Node.js is designed to build scalable network applications. Example 1 In this example, we use the toDateString and toTimeString function const dateTimeObject = new Date(); console.log("A date-time object is created") console.log(`Date: ${dateTimeObject.toDateString()}`); console.log(`Time: ${dateTimeObject.toTimeString()}`); Output A date-time object is created ...
Read MoreHow to call the loading function with React useEffect?
We will use the React useEffect hook to call our loading function. This hook allows us to specify a function that will run on a specific component lifecycle event, such as when the component mounts. By passing in our loading function as a dependency, we ensure that it will be called whenever the component loads or updates. React useEffect The useEffect is a Hook in React that allows you to synchronize a component with an external system. It runs after the component renders and can be used to fetch data, update the DOM, or set up event listeners. It ...
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