?? ?????? ???? ??????? ???? ?????. ?? ???? ???? ?? ??? ??? ??? ??, ?? ? ??? ????. ?? ?????? Telescope Pattern, JavaBeans, Builder Pattern??? ? ?? ?? ?? ?? ??? ???????. ? ??? ???? ???? ??? ?? ??? ??? ?????.

---

1. ??? ??

??? ??? ????? ???? ???? ??? ?? ??? ?? ??? ?????.

?:

public class Product {
    private String name;
    private double price;
    private String category;

    public Product(String name) {
        this.name = name;
    }

    public Product(String name, double price) {
        this(name);
        this.price = price;
    }

    public Product(String name, double price, String category) {
        this(name, price);
        this.category = category;
    }
}

// Usage:
Product product1 = new Product("Laptop");
Product product2 = new Product("Laptop", 1500.0);
Product product3 = new Product("Laptop", 1500.0, "Electronics");

??:

• ???: ??? ?? ?? ??? ?? ??? ??? ??????.
• ???: ??? ???? ? ?? ?? ??? ?????.

??:

• ???? ?? ??: ?? ??? ?? ??? ?? ?? ??????? ???? ??? ????? ?? ??? ??????.
• ??? ??: ??? ?????? ????? ??? ???? ??? ? ????.

---

2. ????

JavaBeans? ?? ?? ???? ?? setter ???? ??? ?? ?? ???? ?????.

?:

public class Product {
    private String name;
    private double price;
    private String category;

    public Product() {}

    public void setName(String name) {
        this.name = name;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public void setCategory(String category) {
        this.category = category;
    }
}

// Usage:
Product product = new Product();
product.setName("Laptop");
product.setPrice(1500.0);
product.setCategory("Electronics");

??:

• ???: ?? ???? ???? ??? ??? ?? ?? ??? ?? ??? ? ????.
• ???: ? setter ???? ?? ??? ???? ??? ???? ?????.

??:

• ??? ??: JavaBeans? ???? ??? ??? ????? ?? ????? ?? ???????? ??? ??? ? ????.
• ???? ??: ??? ?? ???? ??? ? ???? ??? ??? ???? ???? ?????.

---

3. ?? ??

?? ??? ?? ???(??)? ???? ???? ?? ?? ???? ??? ??? ???? ??? ?? ?????.

?:

public class Product {
    private String name;
    private double price;
    private String category;

    public Product(String name) {
        this.name = name;
    }

    public Product(String name, double price) {
        this(name);
        this.price = price;
    }

    public Product(String name, double price, String category) {
        this(name, price);
        this.category = category;
    }
}

// Usage:
Product product1 = new Product("Laptop");
Product product2 = new Product("Laptop", 1500.0);
Product product3 = new Product("Laptop", 1500.0, "Electronics");

??:

• ???: ?? ??? ??? ?????.
• ???: ??? ??? ???? ?? ??? ???? ??? ?????.
• ?? ??: ?? ?? ?? ??? ??? ? ????.

??:

• ?? ????: ????? ? ?? ??? ???? ?? ??? ??? ?? ??? ? ????.
• ?? ???: ??? ??????? Builder ???? ???? ?? ??? ?? ? ????.

---

??

?? ?? ?? ??? ????? ??? ?? ????.

• ?? ??? ?? ??? ??? ??? ?? ??? ??? ?????.
• ???? ???? ????? ???? ????? ?? ?? JavaBeans? ?????.
• ???, ???, ??? ??? ??? ??? ???? ?? ??? ?????.

? ???? ??? ??? ???, ??? ??? ??? ???? ?? ???? ?? ?? ??? ??? ???? ? ?????. ??? ?? ???? ??? ?????? ??? ???? ??? ??????!

---

? ??

• ??? ??
• ???? ??

? ??? ?? ??

• ????
• ???
• ?????

? ??? ?? ????? ??? ??? ??: Telescope Pattern, JavaBeans ? Builder Pattern? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!