Person

package com.codegym.task.task02.task0202; /* Where does a Person come from?int age, int weight, int money. */ public class Solution { public static void main(String[] args) { Person person=new Person(); } public static class Person { String name; int age; int weight; int money; //write your code here } }

Person is just another class in the file Solution.java. You can create your own class if you like. The task is to create a Person object and assign a reference to that object to the variable -> person. When we say - assign a reference to the variable - we simply mean to make it equal to a variable. In Java, variables are stored by reference (or address). So,

int a = 2;

means variable a is simply pointing to the location in memory where 2 is stored. It is referring to that location. When you change the value of a, you simply change the location to where a is pointing. An object is created by using the keyword new. So, to create a Person object we write:

new Person();

And now to assign a reference to the Person object - which we just created above - to a variable, we simply assign it equal to a variable of type -> Class; and which class? The same class whose object we just created i.e. Person.( Note: type can be primitive or composite. int is primitive type. Class is composite type.) So we will assign the object reference to a variable which is of type Person class. Hence,

Person person; //declaring a variable 'person' of type 'Person' class

So, combing the two code steps above, we get:

Person person = new Person(); //'Person' object created and assigned to variable 'person'

A Person is the class and you create an Object of type Person like : Person p = new Person(); p is a reference to the Person Object.