Java object oriented programming examples w3schools
Java object oriented programming examples w3schools
I'll respond with English-only content. Here are some Java object-oriented programming examples from W3Schools, along with explanations and additional details:
Example 1: Animal Class
public class Animal {
private String name;
private int age;
public Animal(String name, int age) {
this.name = name;
this.age = age;
}
public void eat() {
System.out.println(name + " is eating.");
}
}
This example demonstrates a basic animal class with two properties: name and age. The constructor initializes these values. The eat() method simulates the animal's behavior of eating.
Example 2: Dog Class Inheritance
public class Animal {
private String name;
private int age;
public Animal(String name, int age) {
this.name = name;
this.age = age;
}
public void eat() {
System.out.println(name + " is eating.");
}
}
public class Dog extends Animal {
public Dog(String name, int age) {
super(name, age);
}
public void bark() {
System.out.println("Woof!");
}
}
This example showcases inheritance in Java. The Dog class inherits properties and methods from the Animal class using the extends keyword. It also adds a new method called bark() specific to dogs.
Example 3: Bank Account Class
public class BankAccount {
private String accountNumber;
private double balance;
public BankAccount(String accountNumber, double initialBalance) {
this.accountNumber = accountNumber;
this.balance = initialBalance;
}
public void deposit(double amount) {
balance += amount;
System.out.println("Deposit successful. New balance: " + balance);
}
}
This example illustrates a BankAccount class with two properties: accountNumber and balance. The constructor sets the initial balance, and the deposit() method simulates depositing money into the account.
Example 4: Shape Class Polymorphism
public abstract class Shape {
public abstract double getArea();
}
public class Rectangle extends Shape {
private double width;
private double height;
public Rectangle(double width, double height) {
this.width = width;
this.height = height;
}
public double getArea() {
return width * height;
}
}
public class Circle extends Shape {
private double radius;
public Circle(double radius) {
this.radius = radius;
}
public double getArea() {
return Math.PI * radius * radius;
}
}
This example demonstrates polymorphism in Java. The Shape abstract class has an abstract method called getArea(). The Rectangle and Circle classes inherit from the Shape class and override the getArea() method to provide their specific calculations.
These examples showcase various aspects of object-oriented programming (OOP) in Java, including encapsulation, inheritance, polymorphism, and composition. W3Schools provides additional explanations and tutorials for each example, allowing you to learn more about these concepts and how they can be applied in real-world scenarios.
What are the examples of object in Java programming?
I'd be happy to respond in English for you!
In Java programming, an object is an instance of a class that has its own set of attributes (data) and methods (functions). Objects have properties and behaviors, just like real-world objects do. Here are some examples of objects in Java programming:
Rectangle: A rectangle is a graphical object with properties like width, height, and color. You can create aRectangle object with specific dimensions and appearance. Car: Imagine creating a Car object with attributes like make, model, color, and speed. You could then use methods like accelerate(), brake(), or turn() to simulate real-world car behavior. Bank Account: A BankAccount object might have properties like account number, balance, and owner's name. Methods could include deposit(), withdraw(), or checkBalance() to manage the account. Person: Create a Person object with attributes like name, age, address, and phone number. You could then use methods like greet(), eat(), or sleep() to simulate real-world human behavior. Book: A Book object might have properties like title, author, publication date, and genre. Methods could include read(), borrow(), or lend() to manage the book's lifecycle. Employee: An Employee object would have attributes like name, department, salary, and job title. Methods could include reportWorkHours(), requestVacation(), or receiveBonus() to simulate employee management. Shopping Cart: A ShoppingCart object would have properties like items (like books, clothes, etc.), total cost, and payment status. Methods could include addItem(), removeItem(), or checkout() to manage the shopping experience. Weather Data: Create a WeatherData object with attributes like temperature, humidity, wind speed, and weather condition. Methods could include getForecast(), setAlerts(), or analyzeTrends() to process weather data.
These examples illustrate how Java objects can represent real-world entities, concepts, or systems. By creating classes that define the properties and behaviors of these objects, you can write programs that interact with them in meaningful ways. This is a fundamental concept in object-oriented programming (OOP) and is used extensively in Java development.
I hope this helps! Let me know if you have any further questions.
