In Python, Regular Expressions (RegEx) are used to match patterns in the given input strings. The re module in Python provides different methods to use the regular expressions. This module helps the developers to perform search operations, validations, filtering, and much more based on string patterns. In this article, we will explore different ways to match a word in Python using the re module. Match a Specific Word using re.search() In Python, the re.search() method is used to search for a pattern within a given string. If the pattern is found, then it returns a match object otherwise, it returns ... Read More

Maven is a powerful open-source project management tool developed by the Apache Group to build and manage any Java-based project. Additionally, this tool makes Java developers' work easier while developing reports, checking the builds, and testing automation setups. As we stated above, Maven is primarily used to build and manage many Java-based projects, Java eclipse project is the integrated development environment (IDE) that often hits to mind. Hence, by reading this article, you will learn everything about Maven automatic build tool and what it means in Java Eclipse Projects. Understanding Maven Maven is a popular automatic build tool that focuses ... Read More

In Java, the terms Path and ClassPath refer to different things and are used for different purposes. Let's discuss them one by one with a suitable example − Path The path environment variable is used to specify the set of directories that contains execution programs. When you try to execute a program from the command line, the operating system searches for the specified program in the current directory and, if available, executes it. In case the programs are not available in the current directory, the operating system verifies in the set of directories specified in the 'PATH' environment variable. Setting ... Read More

To get System.out.println() line in eclipse without typing the whole line type sysout and press Ctrl + space.

To get public static void main(String[] args) line in eclipse without typing the whole line type main and press Ctrl + space then, you will get the option for the main method select it.

Java does not support the concept of default parameter however, you can achieve this usingMethod overloadingUsing method overloading if you define method with no arguments along with parametrized methods. Then you can call a method with zero arguments.Variable argumentsIn Java methods parameters accept arguments with three dots. These are known as variable arguments. Once you use variable arguments as a parameter method, while calling you can pass as many number of arguments to this method (variable number of arguments) or, you can simply call this method without passing any arguments.ExampleLive Demopublic class Sample {    void demoMethod(String... args) {   ... Read More

Yes, you can define an interface inside a class and it is known as a nested interface. You can’t access a nested interface directly; you need to access (implement) the nested interface using the inner class or by using the name of the class holding this nested interface.ExampleLive Demopublic class Sample {    interface myInterface {       void demo();    }    class Inner implements myInterface {       public void demo() {          System.out.println("Welcome to Tutorialspoint");       }    }    public static void main(String args[]) {       Inner obj ... Read More

Yes, you can define a class inside an interface. In general, if the methods of the interface use this class and if we are not using it anywhere else we will declare a class within an interface.Exampleinterface Library {    void issueBook(Book b);    void retrieveBook(Book b);    public class Book {       int bookId;       String bookName;       int issueDate;       int returnDate;    } } public class Sample implements Library {    public void issueBook(Book b) {       System.out.println("Book Issued");    }    public void retrieveBook(Book b) { ... Read More

An interface with no methods in it is referred to as a marker interface, also known as a tagging interface. There are two basic design purposes of marker interfaces. Creates a common parent  It is used to provide a common parent interface for a group of related interfaces. When an interface like "eventlistener" is extended by dozens of other interfaces in the Java API, we can use a marker interface to create a common parent among a group of interfaces. For example, when an interface extends EventListener, the JVM knows that this particular interface is going to be used in an ... Read More

A Dictionary in Python is a mutable, unordered collection of data in a key-value format. A dictionary can also contain another dictionary as a value, and this is known as a Nested Dictionary or a dictionary within a dictionary. In this article, we are going to explore all the different ways to use a dictionary within a dictionary in Python. Syntax to define a Dictionary within another Following is the syntax of creating a Dictionary within another Dictionary in Python - outer_dict = { 'key1': { 'inner_key1': ... Read More