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Programming Articles
Page 1712 of 2547
Primitive data type vs. Object data type in Java with Examples
In a Java environment, every variable contains with some data types, which specify the value and type of a sorted identifier. There are two categories − Primitive Data type Non-Primitive Data type or Object data type The primitive data types are some predefined data types with some specific size and type. This method has some standard values with the types know as byte, short, int, long, float, double, char and boolean. When we want to run a primitive structure, then it stores the data in a stack and assign a value for the process. On the other hand, ...
Read MoreHow to get ArrayList to ArrayList and vice versa in java?
ArrayList to ArrayList Instead of the typed parameter in generics (T) you can also use “?”, representing an unknown type. These are known as wild cards you can use a wild card as − Type of parameter or, a Field or, a Local field. Using wild cards, you can convert ArrayList to ArrayList as − ArrayList stringList = (ArrayList)(ArrayList)(list); Example import java.util.ArrayList; import java.util.Iterator; import java.util.ListIterator; public class ArrayListExample { public static void main(String args[]) { //Instantiating an ArrayList object ...
Read MoreJava Program to Sort 2D Array Across Columns
In the field of data structure, the vector is a growable class array of a particular object. The vector class falls in the legacy class which is fully compatible with the collections. In java.util package, the List interface can use all the methods listed here. Here is the initial capacity is 10 and the general method is: Vector v = new Vector(); The compare() method accepts two parameters and then compare each other by using Java environment logic. In this article today, we will learn about the sorting process of a 2D array set across the columns. Algorithm to ...
Read MoreJava Program to Find out the Area and Perimeter of Rectangle using Class Concept
Java Language is one of the most used popular object - oriented programming language in present world. Class concept is one of the most important feature in Object - oriented languages. A Class is a like a blue print of an object. For example, when we want to build a house we first create a blue print of the house in other words we create a plan showing how we are going to build the house. Based on the plan we can create a number of houses. Similarly using class, we can create a number of objects. A class ...
Read MoreJava Program to Implement the RSA Algorithm
The RSA name is given by their inventors which is used to encrypt the text with high security. The RSA technique is one of the most used techniques to encrypt text, as it is the asymmetric encryption algorithm. It encrypts the text by utilizing the mathematical properties of the prime numbers. In the RSA algorithm, the sender and receiver have private keys. Also, a common public key exists, which the sender shares with the receiver. The sender encrypts the plain text using their own public and private key, and the receiver decrypts the message using their private and public ...
Read MoreJAVA Menu Driven Program to Check Character is String, Number or Special Character
In this article, we will see a menu driven program to check if the entered character is number, string or special character by Java programming language. We will be implementing the application using a switch case. To show you some instances Instance-1 Suppose the entered character is ‘a’ then the output should be “Entered character is a String”. Instance-2 Suppose the entered character is ‘1’ then the output should be “Entered character is a number”. Instance-3 Suppose the entered character is ‘$’ then the output should be “Entered character is a Special character”. Syntax To check whether ...
Read MoreJava Program to Extract Digits from A Given Integer
In Java programming, there are scenarios where we need to extract individual digits from an integer for further manipulation or analysis. This tutorial will guide you through the process of extracting digits from a given integer using Java. Syntax while (num > 0) { int digit = num % 10; System.out.println(digit); num = num / 10; } The above is the syntax to extract digits from an integer in Java. We keep extracting the last digit by taking the remainder of the number with 10. We divide the number by 10 until it ...
Read MoreJava ResultSet next() method with example
When we execute certain SQL queries (SELECT query in general) they return tabular data.The java.sql.ResultSet interface represents such tabular data returned by the SQL statements.i.e. the ResultSet object holds the tabular data returned by the methods that execute the statements which quires the database (executeQuery() method of the Statement interface in general).The ResultSet object has a cursor/pointer which points to the current row. Initially this cursor is positioned before first row.The next() method of the ResultSet interface moves the pointer of the current (ResultSet) object to the next row, from the current position.Statement stmt = con.createStatement(); ResultSet rs = stmt.executeQuery("Select ...
Read MoreJava program to calculate Body Mass Index (BMI)
The Body Mass Index is the body mass in kilogram divided by the square of body height in meters. This is expressed as kg/m^2.A Java program that calculates the Body Mass Index (BMI) is given as follows.Exampleimport java.util.Scanner; public class Example { public static void main(String args[]) { Scanner sc = new Scanner(System.in); System.out.print("Input weight in kilogram: "); double weight = sc.nextDouble(); System.out.print("Input height in meters: "); double height = sc.nextDouble(); double BMI = weight / (height * height); ...
Read MoreHow to import other Python files?
The task or process of importing other files in Python allows you to use functions, classes, or variables defined in those files within your current Python script. In this article, we will explore different ways to import other Python files, including built-in modules, user-defined modules, and importing specific functions or variables. By the end of this article, you will have a solid understanding of how to import and use code from other Python files in your current projects. Along the way, we will use code examples followed by lucid explanations to help you understand the above task. Importing a User-Defined ...
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