The difference between java abstract class and interface
The difference between interfaces and abstract classes:
1. Abstract classes can contain ordinary methods, but interfaces can only contain public and abstract methods (before JDK 1.8) ;
2. There are no access restrictions on member variables in abstract classes, but variables in interfaces can only be modified by public static final;
3. One interface can inherit multiple interfaces, But a class can only have one parent class, and a class can implement multiple interfaces;
4. An abstract class is an abstraction of a type of thing, and an interface is an abstraction of behavior. A class inheriting an abstract class represents the "is it" relationship, while a class implementing an interface represents the "is it having" relationship.
Recommended tutorial: java tutorial
The above is the detailed content of The difference between java abstract class and interface. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1379
52
What are the basic requirements for c language functions
Apr 03, 2025 pm 10:06 PM
C language functions are the basis for code modularization and program building. They consist of declarations (function headers) and definitions (function bodies). C language uses values to pass parameters by default, but external variables can also be modified using address pass. Functions can have or have no return value, and the return value type must be consistent with the declaration. Function naming should be clear and easy to understand, using camel or underscore nomenclature. Follow the single responsibility principle and keep the function simplicity to improve maintainability and readability.
The difference between H5 and mini-programs and APPs
Apr 06, 2025 am 10:42 AM
H5. The main difference between mini programs and APP is: technical architecture: H5 is based on web technology, and mini programs and APP are independent applications. Experience and functions: H5 is light and easy to use, with limited functions; mini programs are lightweight and have good interactiveness; APPs are powerful and have smooth experience. Compatibility: H5 is cross-platform compatible, applets and APPs are restricted by the platform. Development cost: H5 has low development cost, medium mini programs, and highest APP. Applicable scenarios: H5 is suitable for information display, applets are suitable for lightweight applications, and APPs are suitable for complex functions.
What are the differences and connections between c and c#?
Apr 03, 2025 pm 10:36 PM
Although C and C# have similarities, they are completely different: C is a process-oriented, manual memory management, and platform-dependent language used for system programming; C# is an object-oriented, garbage collection, and platform-independent language used for desktop, web application and game development.
What is the difference between an abstract class and an interface in PHP?
Apr 08, 2025 am 12:08 AM
The main difference between an abstract class and an interface is that an abstract class can contain the implementation of a method, while an interface can only define the signature of a method. 1. Abstract class is defined using abstract keyword, which can contain abstract and concrete methods, suitable for providing default implementations and shared code. 2. The interface is defined using the interface keyword, which only contains method signatures, which is suitable for defining behavioral norms and multiple inheritance.
How to set password protection for export PDF on PS
Apr 06, 2025 pm 04:45 PM
Export password-protected PDF in Photoshop: Open the image file. Click "File"> "Export"> "Export as PDF". Set the "Security" option and enter the same password twice. Click "Export" to generate a PDF file.
How to use XPath to search from a specified DOM node in JavaScript?
Apr 04, 2025 pm 11:15 PM
Detailed explanation of XPath search method under DOM nodes In JavaScript, we often need to find specific nodes from the DOM tree based on XPath expressions. If you need to...
Why do you need to call Vue.use(VueRouter) in the index.js file under the router folder?
Apr 05, 2025 pm 01:03 PM
The necessity of registering VueRouter in the index.js file under the router folder When developing Vue applications, you often encounter problems with routing configuration. Special...
Concept of c language function
Apr 03, 2025 pm 10:09 PM
C language functions are reusable code blocks. They receive input, perform operations, and return results, which modularly improves reusability and reduces complexity. The internal mechanism of the function includes parameter passing, function execution, and return values. The entire process involves optimization such as function inline. A good function is written following the principle of single responsibility, small number of parameters, naming specifications, and error handling. Pointers combined with functions can achieve more powerful functions, such as modifying external variable values. Function pointers pass functions as parameters or store addresses, and are used to implement dynamic calls to functions. Understanding function features and techniques is the key to writing efficient, maintainable, and easy to understand C programs.
