If a class is declared final, you cannot inherit it. If you try it gives you a compile-time error as − Example final class Super { private int data = 30; } public class Sub extends Sub { public static void main(String args[]){ } } Output Exception in thread "main" java.lang.Error: Unresolved compilation problem: at Sub.main(Sub.java:7)

The path of a current file is defined with the help of directory hierarchy; and it contains the backtracked path from the current file to the root directory this file is present in. For instance, consider a file “my_file” belongs to a directory “my_directory”, the path for this file is defined as given below ./my_directory/my_file The directory, sub-directory and the file are all separated using the “/” separator in the path. Therefore, to get current file's full path, you can use the os.path.abspath() function. If you want only the directory path, you can call os.path.dirname() method. Using os.path.abspath() Method ... Read More

In Python, the __init__.py is a special file in python packages. It is used to indicate that how a directory should be treated. When Python encounters a directory during an import, first it looks for the __init__.py file to determine how to initialize the package and what code should be executed during the import. In python 3.3 version, the __init__.py was introduced with the feature of creating a package with the namespace. Let's understand the purpose of the __init__.py file - It makes the directory a Python package so the interpreter can find the module ... Read More

A directory is simply defined as a collection of subdirectories and single files or either one of them. These subdirectories are separated using a "/" operator in a directory hierarchy. A directory hierarchy is constructed by organizing all the files and subdirectories within a main directory and also known as the "root" directory. Calculating the total size of a directory, i.e., all its files and subdirectories which is a common task in Python, especially when dealing with disk usage monitoring, backup management, or cleaning up storage. Python provides multiple ways to accomplish this efficiently using built-in modules such as os ... Read More

In some applications, we have to find the files on our computer programmatically to make use of out time. Python provides several powerful libraries to search and locate files by making this task straightforward and efficient. In this article, we are going to see the different methods to find a file in our system using Python. Using the os Module The os module has a method os.walk(), which is used to search for a file in the directories and their subdirectories. This method returns the file paths in a directory which allows the user to search for a specific file. ... Read More

The site-packages directory in python, is the place where third-party libraries and packages are installed. Knowning the site-packeges location is useful for debugging, verifying installations or inspecting package contents. This directory may vary depending on our operating system, Python version or based on the virtual environment we are using. In this article, we are going to explore the different ways to find the location of site packages directory in our working environments. Using site.getsitepackages() The getsitepackages() function of the site module, returns a list of global site-packages directories. This method may not work inside virtual environments and could be unavailable ... Read More

No, a child class can’t inherit private members of the parent class, it can inherit only protected, default, and public members of it. If you try it gives you a compile time error as: − Example class Super{ private int data = 30; public void display(){ System.out.println("Hello this is the method of the super class"); } } public class Sub extends Super{ public void greet(){ System.out.println("Hello this is the method of the sub class"); ... Read More

Java supports inheritance, an OOPs concept where one class acquires the members (methods and fields) of another.You can inherit the members of one class from another, use the extends keyword as:class A extends B{}The class which inherits the properties of other is known as child class (derived class, sub class) and the class whose properties are inherited is known as parent class (base class, superclass class).Following is an example which demonstrates inheritance. Here, we have two classes namely Sample and MyClass. Where Sample is the parent class and the class named MyClass is the child class.ExampleLive Democlass Sample{    public ... Read More

In Java, static members are those which belongs to the class and you can access these members without instantiating the class. The static keyword can be used with methods, fields, classes (inner/nested), blocks. Static Methods − You can create a static method by using the keyword static. Static methods can access only static fields, methods. To access static methods there is no need to instantiate the class, you can do it just using the class name as − Example Live Demo public class MyClass { public static void sample(){ ... Read More

Following is the syntax to declare a method in Java. Syntax modifier return_type method_name(parameters_list){ //method body } Where, modifier − It defines the access type of the method and it is optional to use. return_type − Method may return a value. method_name − This is the method name. The method signature consists of the method name and the parameter list. parameters_list − The list of parameters, it is the type, order, and a number of parameters of a method. These are optional, method may contain zero parameters. method body − The method body defines ... Read More