Why are public methods and variables not visible in the same package?

Question

Java

I work in IntelliJ Idea.
We have the Human class as a separate file.

public class Human {
    public int age = 0;
    public String name = "Nobody";
    protected int height = 1;
    protected int strength = 1;

    public void setAge(int age) {
        this.age = age;
    }

    public int getAge() {
        return age;
    }

    public int getHeight() {
        return height;
    }

    public int getStrength() {
        return strength;
    }

In the same package, another Life class is also a separate file:

public class Life {
    Human petrovich = new Human();
    petrovich. // тут по ctrl+space мы узнаём, что нет доступа к методам и атрибутам Human
}

Why doesn't an instance of the Human petrovich class have access to the methods and attributes of the Human parent class?

Answer 1

You didn't create a procedure in the Life class:

public class Life {
    Human a = new Human();
    public void test(){
        a.getAge();
    }
}

And everything works.

Answer 2

Please remove public and protected fields. All fields must be private. Have their setters and getters make the scopes what you need. The rest has already been answered.