I am struggling to understand this lesson.

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I am struggling to learn this new stuff and I don't understand the things one why a int is primitive and String is not. I feel like they just dumped the whole objects thing on me and idk how it works even after carefully reading the lesson. I'm very troubled on figuring out the basic concept in general. Also I don't understand the point of a new static class I mean what difference does it make or what is it even used to do. I hope it made sense.

In the Person class, declare the following variables: String name, int age, int weight, int money.
In the main method, create a Person object and store a reference to it in the variable person.

Hint: Use the following construct to create a Person object and assign a reference to that object to the variable person:
VariableType variableName = new TypeOfObjectBeingCreated();

Requirements:

In the Person class, declare a String variable called name.
In the Person class, declare an int variable called age.
In the Person class, declare an int variable called weight.
In the Person class, declare an int variable called money.
In the main method, create a Person object and immediately assign a reference to it to the variable person.
Five variables must be declared.

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

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jai singh

Level 11 , ludhiana, India

20 April 2021, 20:02

solution

Classes and objects are what makes java object oriented programming language. And classes and objects are a big topic. There are levels explaining classes and objects later so you should not stress your mind about them for now. And for the int and String , There are basically two data types in java - primitive and non-primitive or user defined. Primitive types can be seen as fundamental data types for programming. All the non-primitive data types are created using these primitive data types. String is also a non-primitive data type. A string is basically a sequence of characters(char data type). So every non-primitive data type is essentially an object. Now the reason why string is not a primitive data type might be due to memory. primitive data types like int and char use few bytes of memory. while a string can take way more memory depending upon its size. Since strings are used the most in a program, they are implemented in that way to make program efficient in terms of memory( You will learn about it in detail in later chapters about referencing ).

Gellert Varga

Level 23 , Szekesfehervar, Hungary

19 April 2021, 22:01

solution

"In the main method, create a Person object and immediately assign a reference to it to the variable person." It means: You have to declare a Person type variable - not String type, not int type, but Person type. (in line 12: String Person = . . . you tried to declare a String type variable. But the name of the variable must be lowercase.) Use this formula: VariableType variableName = new TypeOfObjectBeingCreated(); ( TypeOfObjectBeingCreated means: the name of the class.) Everything will be clearer later.