?? ?? ?????? ???

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

???? ??

1. ??? ??: ?? ??? ?? ????? ???? ???? ???(getter ? setter)? ?? ?????.
2. ??? ?? ?? ??: ???? ???? ?? ??? ??? ?? ?? ??? ???? ??? ? ????.
3. ??? ??: ??? ?? ?? ???? ???? ???? ?? ????? ???? ???? ??? ? ????.

?? ??: ??? ??

// Encapsulation refers to restricting access of a class from the outside world
public class Person {
    private String name;
    private String profession;
    private double height;
    private int ID;
    private int age;

    // Constructor
    public Person(String name, String profession, double height, int iD, int age) {
        this.name = name;
        this.profession = profession;
        this.height = height;
        ID = iD;
        this.age = age;
    }

    // Getters and setters for accessing private fields
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getProfession() {
        return profession;
    }
    public void setProfession(String profession) {
        this.profession = profession;
    }
    public double getHeight() {
        return height;
    }
    public void setHeight(double height) {
        this.height = height;
    }
    public int getID() {
        return ID;
    }
    public void setID(int iD) {
        ID = iD;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }

    // Main method to demonstrate encapsulation
    public static void main(String[] args) {
        Person myPerson = new Person("Robert", "doctor", 130.4, 39, 23);

        // Accessing private fields through getter methods
        System.out.println(myPerson.getName());
        System.out.println(myPerson.getProfession());
        System.out.println(myPerson.getID());
        System.out.println(myPerson.getAge());
    }
}

?? ??

??? ??

??, ??, ?, ???, ?? ??? ???? ???? ????. ?? ?? ??? ???? ?? ???? ? ????.

??? ??

getName(), setName(), getProfession() ?? ?? ?? ???? ??? ??? ?? ??? ??? ??? ??? ???. ??? ??? ???? ?? ??? ?? ???? ???? ???? ??? ? ????.

???

Person ???? ??? ???? ???? ??? ??????. ??? ?? ??? ??? ???? ?????.

?? ??

?? ??? ???? ??? ????? ?????. ??? ??? getter ???? ?? ????? ??????.

??? ??

1. ??? ??:

   • ??? ??? ?? ?????? ??? ? ???? ?????? ???? ??? ??? ? ????.

2. ??? ??:

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

    public void setAge(int age) {
        if (age > 0) {
            this.age = age;
        } else {
            System.out.println("Age must be positive.");
        }
    }
   

3. ?? ???:

   • ?? ??? ???? ??(?: ?? ?? ??) ???? ???? ?? ??? ??? ?? ????.

? ???? ???? ?? Person ???? ???? ???? ?? ?? ??? ??? ??? ?? ??? ?? ??? ?????? ???? ??? ?????.

? ??? ?? ?? ?????? ??? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!