No, a constructor can’t be made final. A final method cannot be overridden by any subclasses. As mentioned previously, the final modifier prevents a method from being modified in a subclass. The main intention of making a method final would be that the content of the method should not be changed by any outsider. But, in inheritance sub class inherits the members of a super class except constructors. In other words, constructors cannot be inherited in Java therefore, there is no need to write final before constructors. Therefore, java does not allow final keyword before a constructor. If you try ... Read More

No, constructors are not inherited in Java.

Empty describes anything which contains nothing. Using a computer as an example, an empty file is one that has no data in it; it has 0 bytes and is in plain text format having no data kept in a file. Let us discuss various types of empty files that can be created using python. Creating an empty CSV file The plain text file format known as a CSV file (Comma Separated Values file) is used to structure tabular data in a particular way.It can only contain actual text data that is, printable ASCII or Unicode characters—because it is a plain ... Read More

No, constructor does not return any value. While declaring a constructor you will not have anything like return type. In general, Constructor is implicitly called at the time of instantiation. And it is not a method, its sole purpose is to initialize the instance variables. Example Live Demo public class Sample{ public Sample(){ System.out.println("This is a constructor"); } public static void main(String args[]){ Sample obj = new Sample(); } } Output This is a constructor

In the domain of file handling and manipulation in Python, it is often critical to determine the MIME (Multipurpose Internet Mail Extensions) type of a file. MIME types are standardized labels used to identify the nature and format of a file's content. They play a crucial role in various applications, such as web development, email attachments, and data transmission over the internet. Being able to ascertain the MIME type of a file is vital for performing appropriate actions based on its content, such as validating, processing, or displaying it correctly. In this particular article, we will explore different methods to ... Read More

No, you cannot have both this() and super() in a single constructor.

Constructors are similar to methods but, They do not have any return type. The name of the constructor is same as the name of the class. Every class has a constructor. If we do not explicitly write a constructor for a class, the Java compiler builds a default constructor for that class. Each time a new object is created, at least one constructor will be invoked. A class can have more than one constructor. this() and super() are used to call constructors explicitly. Where, using this() you can call the current class’s constructor and using super() you can ... Read More

An operating system like Microsoft Windows uses a file extension as a suffix to the name of a computer file. It falls under the category of metadata. An operating system's understanding of a file's attributes and, to some extent, its desired usage is supported by the file extension. We could need to extract file extensions in Python. You can achieve this in a number of ways. Os.path module OS file path manipulation is made simple with the help of the Python module os.path. It covers receiving the data from file paths, opening, saving, and updating.To obtain the file extension ... Read More

Java 8 introduces a new concept of default method implementation in interfaces. This capability is added for backward compatibility so that old interfaces can be used to leverage the lambda expression capability of Java 8. For example, ‘List’ or ‘Collection’ interfaces do not have ‘foreach’ method declaration. Thus, adding such method will simply break the collection framework implementations. Java 8 introduces default method so that List/Collection interface can have a default implementation of foreach method, and the class implementing these interfaces need not implement the same. Syntax public interface vehicle { default void print() { ... Read More

File extensions play a crucial role by helping in identifying the type of content a file holds. The task of changing the file extension is a common in various use cases, such as converting file formats, renaming files for compatibility, or ensuring files are correctly interpreted by specific applications. Python, being a versatile and powerful programming language, offers several methods to change the file extension of a file. In this informative and enlightening article, we will explore different techniques to change the file extension in Python. We will provide step−by−step explanations and code examples to guide you through the process. ... Read More