To read data from user create a scanner class. Read the size of the array to be created from the user using nextInt() method. Create an array with the specified size. In the loop read the values from the user and store in the array created above.Exampleimport java.util.Arrays; import java.util.Scanner; public class PopulatingAnArray {    public static void main(String args[]) {       System.out.println("Enter the required size of the array :: ");       Scanner s = new Scanner(System.in);       int size = s.nextInt();       int myArray[] = new int [size];     ... Read More

While choosing a package name you need to keep the following points in mind. The name of the package should be in small letters. It is suggested to start the name of the package with the top level domain level followed by sub domains, ex: com.example.tutorialspoint. Example You can declare a package as in. package com.mypackage.tutorialspoint; Public class Sample { Public static void main(String args[]) { System.out.println("Welcome to Tutorialspoint"); } } Executing a package You need to compile the file with packages using –d ... Read More

The openStream() method of the URL class opens a connection and returns an InputStream. Using this stream, you can you read contents from that connection.Exampleimport java.io.InputStream; import java.net.URL; import java.util.Scanner; public class ReadingURL {    public static void main(String args[]) throws Exception {       URL url = new URL("http://www.tutorialspoint.com/");       InputStream inputStream = url.openStream();       Scanner s = new Scanner(inputStream);       while(s.hasNext()) {          System.out.println(s.nextLine());       }    } }OutputLearn CouchDB Learn DB2    Learn DocumentDB SQL Learn DocumentDB Learn DynamoDB    Learn H2 Database Learn HSQLDB Learn IMS DB …………………………………………………………………………………………. ………………………………………………………………………………………………… ………………………………………………………………………………………………

While writing an interface/class names you need to keep the following points in mind. First letter of the interface/class name should be capital and remaining letters should be small (mixed case). interface Sample Likewise, first letter of each word in the name should be capital an remaining letters should be small. interface MYInterface Keeping interface names simple and descriptive is suggestable. Better not to use acronyms while writing interface/class names. Example Live Demo interface MyInterface { void sample(); void demo(); } ... Read More

Declaring a constructor is in Java is similar to methods. While naming the constructor of a class in Java you need to keep the following points in mind. The name of the constructor should be the same (same case) as the class name (along with the access specifier). A constructor should not have any return type. Constructor cannot be static, final, abstract and, synchronized. Example Following Java program is an example of a constructor. Live Demo public class Sample { Sample() { System.out.println("This is an example of ... Read More

In Python, there are two ways to provide input information to a program. One in which we directly assign input objects to object references/variables; and the other in which the program takes user input dynamically (during runtime). Python 2.x versions use raw_input() function to take user input dynamically; whereas, Python 3.x versions use input() function. The input() function only takes input values in the form of strings, by default. In this article, we will learn how to read the input as “Numbers” in Python 3.x using input() function. Reading Inputs as Numbers Python, like any other programming languages, accepts two ... Read More

Python is a high-level programming language that helps users to run a program and integrate systems more efficiently, as it executes a program in comparatively fewer lines of code. In Python programming language, a code can be executed in two ways - Interactive Mode Script Mode In this article, we will learn how to execute a Python program in script mode on Windows. However, the steps are almost the same for other operating systems.Python Script Mode Script mode in Python allows us to write Python code in files with the .py extension and run the entire program at ... Read More

Python is a high-level programming language that helps a user to run a program and integrate systems more efficiently, as it executes a program in comparatively fewer lines of code. In Python programming language, a code can be executed in two ways - Interactive Mode Script Mode In this article, we will learn how to execute Python code in Interactive mode in Windows. However, the commands are almost the same in other operating systems as well. Interactive Mode Interactive mode in Python is a built-in feature that allows users to execute Python commands one line at a time. ... Read More

The command line is the place where executable commands are given to the operating system. In Python, command-line arguments allow users to pass information to a script when it's executed from the terminal.  A Python script can be executed by writing its name in front of the Python executable on the command line. Following is the example command which executes the Python file named sample.py - python sample.py If we need to pass arguments to a script, we can pass them at the time of execution, separating them by a space as shown below - python test.py Hello TutorialsPoint Python ... Read More

In Python, both single quotes (') and double quotes (") are used to define string literals, and they function in the same way.  For example, if a string contains a single quote character, like in a contraction, i.e., it’s by using double quotes avoids the need for escape characters by making the code cleaner and easier to read. Similarly, single quotes can be useful when a string contains double quotation marks. Single Quotes in Python Single quotes are used to wrap small and short strings in Python, such as string literals or identifiers. We must remember that using single quotes ... Read More