Java 상속

개요

Class 를 상속받아 다른 Class에서 활용할수 있다

subclass (child) - 어떤 Class를 상속받은 Class

superclass (parent) - 다른 Class에 상속해준 Class

extends 라는 키워드를 쓰면 상속받을수 있다.

class Vehicle {
  protected String brand = "Ford";        // Vehicle attribute
  public void honk() {                    // Vehicle method
    System.out.println("Tuut, tuut!");
  }
}

class Car extends Vehicle {
  private String modelName = "Mustang";    // Car attribute
  public static void main(String[] args) {

    // Create a myCar object
    Car myCar = new Car();

    // Call the honk() method (from the Vehicle class) on the myCar object
    myCar.honk();

    // Display the value of the brand attribute (from the Vehicle class) and the value of the modelName from the Car class
    System.out.println(myCar.brand + " " + myCar.modelName);
  }
}