search
HomeJavajavaTutorialIntroduction to Java Basics to Practical Applications: Object-Oriented Practical Design

Object-oriented programming (OOP) is a programming paradigm that introduces objects and classes into code to facilitate the development of large software systems. This article introduces the practical application of object-oriented design through a bank account system case: Define classes and objects: Divide system functions into classes and objects, for example, the BankAccount class represents a bank account. Create and use objects: Create a BankAccount object and operate it using methods such as deposit, withdrawal, and balance query. Modularity and maintainability: By separating data and operations into classes and objects, the scalability, reusability and ease of maintenance of the code are achieved.

Introduction to Java Basics to Practical Applications: Object-Oriented Practical Design

Java Basics to Practical Application: Object-Oriented Practical Design

Object-oriented programming (OOP) is a programming paradigm. It introduces the concepts of objects and classes into code, making it easier to develop and maintain large software systems. This article will provide a practical case to help you understand the basics of object-oriented design.

Case: Design a bank account system

Consider a bank account system that contains the following main functions:

  • Create an account
  • Deposit
  • Withdrawal
  • Check balance

Design classes and objects

The first step is to define Classes and objects in the system. A bank account can be represented as a class, which contains account information and operation methods.

public class BankAccount {
    private int accountNumber;
    private double balance;

    // Constructor
    public BankAccount(int accountNumber, double balance) {
        this.accountNumber = accountNumber;
        this.balance = balance;
    }

    // Methods
    public void deposit(double amount) {
        balance += amount;
    }

    public void withdraw(double amount) {
        if (amount <= balance) {
            balance -= amount;
        }
    }

    public double getBalance() {
        return balance;
    }
}

Creating and using objects

Next, we can create BankAccount objects and perform operations with them.

// 创建一个账户对象
BankAccount account = new BankAccount(123456789, 1000.0);

// 存入 500 元
account.deposit(500.0);

// 取款 300 元
account.withdraw(300.0);

// 查询余额
double balance = account.getBalance();
System.out.println("账户余额:" + balance);

Output results:

账户余额:1200.0

By using classes and objects to separate data and operations in the code, we create a modular and easy-to-maintain bank account system.

Conclusion

Object-oriented design is a powerful method for building complex systems in Java. By understanding the concepts of classes, objects, and methods, you can design code that is extensible, reusable, and easy to understand.

The above is the detailed content of Introduction to Java Basics to Practical Applications: Object-Oriented Practical Design. For more information, please follow other related articles on the PHP Chinese website!

Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Treatment of x² in curve integral: Why can the standard answer be ignored (1/3) x³?Treatment of x² in curve integral: Why can the standard answer be ignored (1/3) x³?Apr 19, 2025 pm 08:06 PM

Questions about a curve integral This article will answer a curve integral question. The questioner had a question about the standard answer to a sample question...

What should I do if the Redis cache of OAuth2Authorization object fails in Spring Boot?What should I do if the Redis cache of OAuth2Authorization object fails in Spring Boot?Apr 19, 2025 pm 08:03 PM

In SpringBoot, use Redis to cache OAuth2Authorization object. In SpringBoot application, use SpringSecurityOAuth2AuthorizationServer...

Why can't the main class be found after copying and pasting the package in IDEA? Is there any solution?Why can't the main class be found after copying and pasting the package in IDEA? Is there any solution?Apr 19, 2025 pm 07:57 PM

Why can't the main class be found after copying and pasting the package in IDEA? Using IntelliJIDEA...

Java multi-interface call: How to ensure that interface A is executed before interface B is executed?Java multi-interface call: How to ensure that interface A is executed before interface B is executed?Apr 19, 2025 pm 07:54 PM

State synchronization between Java multi-interface calls: How to ensure that interface A is called after it is executed? In Java development, you often encounter multiple calls...

In Java programming, how to stop subsequent code execution when student ID is repeated?In Java programming, how to stop subsequent code execution when student ID is repeated?Apr 19, 2025 pm 07:51 PM

How to stop subsequent code execution when ID is repeated in Java programming. When learning Java programming, you often encounter such a requirement: when a certain condition is met,...

Ultimate consistency: What business scenarios are applicable to? How to ensure the consistency of the final data?Ultimate consistency: What business scenarios are applicable to? How to ensure the consistency of the final data?Apr 19, 2025 pm 07:48 PM

In-depth discussion of final consistency: In the distributed system of application scenarios and implementation methods, ensuring data consistency has always been a major challenge for developers. This article...

After the Spring Boot service is running for a period of time, how to troubleshoot?After the Spring Boot service is running for a period of time, how to troubleshoot?Apr 19, 2025 pm 07:45 PM

The troubleshooting idea of ​​SSH connection failure after SpringBoot service has been running for a period of time has recently encountered a problem: a Spring...

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

SublimeText3 Linux new version

SublimeText3 Linux new version

SublimeText3 Linux latest version

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

SublimeText3 English version

SublimeText3 English version

Recommended: Win version, supports code prompts!

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.