Java Class - 생성자

Notebook bn = new Notebook();

        

// 오버로드는 같은 이름으로 여러개의 메서드나 생성자를 만들게 해 준다.

// 객체 생성시 다양한 방법을 재공해 줄 수 있다.

        // String model, int price, String color

        Notebook bn2 = new Notebook("자동차", 2500, "red");

        System.out.println(bn2.model);

        System.out.println(bn2.price);

        System.out.println(bn2.color);

        

        // String model, String color

        Notebook bn3 = new Notebook("자동차", "red");

        System.out.println(bn3.model);

        System.out.println(bn3.color);

        

        // String model, int price

        Notebook bn4 = new Notebook("자동차", 2500);

        System.out.println(bn4.model);

        System.out.println(bn4.price);

        

        // String color, int price -> (X)

<!-- Notebook.class -->

public class Notebook {

            public String model;

            public int price;

            public String color;

            

            public Notebook(String _model, int _price, String _color) {

                

                model = _model;

                price = _price;

                color = _color;

                

            }

            public Notebook(String _model, int _price) {

                

                model = _model;

                price = _price;

                

            }

            public Notebook(String _model, String _color) {

                

                model = _model;

                color = _color;

                

            }

            public Notebook() {

                

            }

        

        }

this. // 으로 클래스의 변수를 명확하게 지정 가능

// main

public static void main(String[] args) {

        

            Car c = new Car();

            c.start();

            c.change(100);

            

        }

// Car Class

public class Car {

            public int gear = 0;

            public boolean on = false;

            

            public Car() {

                

            }

            

            public void start() {

                

            }

            

            public void change(int gear) {

                

                this.gear = gear; // this -> 자신클래스

                

            }

        

        }