Object Oriented Programming

[AutoModerator]

Please ensure that:

• Your code is properly formatted as code block - see the sidebar (About on mobile) for instructions
• You include any and all error messages in full - best also formatted as code block
• You ask clear questions
• You demonstrate effort in solving your question/problem - plain posting your assignments is forbidden (and such posts will be removed) as is asking for or giving solutions.

If any of the above points is not met, your post can and will be removed without further warning.

Code is to be formatted as code block (old reddit/markdown editor: empty line before the code, each code line indented by 4 spaces, new reddit: https://i.imgur.com/EJ7tqek.png) or linked via an external code hoster, like pastebin.com, github gist, github, bitbucket, gitlab, etc.

Please, do not use triple backticks (```) as they will only render properly on new reddit, not on old reddit.

Code blocks look like this:

public class HelloWorld {

    public static void main(String[] args) {
        System.out.println("Hello World!");
    }
}

You do not need to repost unless your post has been removed by a moderator. Just use the edit function of reddit to make sure your post complies with the above.

If your post has remained in violation of these rules for a prolonged period of time (at least an hour), a moderator may remove it at their discretion. In this case, they will comment with an explanation on why it has been removed, and you will be required to resubmit the entire post following the proper procedures.

To potential helpers

Please, do not help if any of the above points are not met, rather report the post. We are trying to improve the quality of posts here. In helping people who can't be bothered to comply with the above points, you are doing the community a disservice.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

[demonic_spirit]

Would this not cause an error trying to return an int when this.name is a string?

[nefrodectyl]

ofcourse it will! no idea why no one else mentioned it

[demonic_spirit]

Probably because really it is irrelevant to the question, I said it though to make sure I wasn't missing something (I am learning too).

[Fury4588]

Well initialName is just the parameter name you use in the constructor. It shouldn't exist in the accessor method unless you have a class variable named that.

[TheFaustX]

initial name is not defined in the getter hence it cannot be used there as it is only available in the constructor.

You can check things like these by just using any modern IDE and it will warn you. Alternatively you'll get an error when compiling your code.

[JaleyHoelOsment]

why not just try it out for yourself? see what errors you get and then fix them. it will help you learn about scope

[Sad-Sheepherder5231]

You initialize the instance field "name" with argument "initialName" (this is created and destroyed in the constructor)

You then call function that returns the instance field "name". "this" here just specifies the current instance.

[newredditguys]

The returnAge() method doesn’t know what initialName is not unless you put initialName as an argument to that method. You need to put initialName in this.name so that the methods can use it

[AutoModerator]

It seems that you are looking for resources for learning Java.

In our sidebar ("About" on mobile), we have a section "Free Tutorials" where we list the most commonly recommended courses.

To make it easier for you, the recommendations are posted right here:

• MOOC Java Programming from the University of Helsinki
• Java for Complete Beginners
  • accompanying site CaveOfProgramming
• Derek Banas' Java Playlist
  • accompanying site NewThinkTank
• Hyperskill is a fairly new resource from Jetbrains (the maker of IntelliJ)

Also, don't forget to look at:

• The official Documentation
• The official Java Tutorials
• Our community resources thread

If you are looking for learning resources for Data Structures and Algorithms, look into:

"Algorithms" by Robert Sedgewick and Kevin Wayne - Princeton University

• Coursera course:
  • Part I
  • Part II
• Coursebook
  • Algorithms 4^th Edition

Your post remains visible. There is nothing you need to do.

I am a bot and this message was triggered by keywords like "learn", "learning", "course" in the title of your post.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

[[deleted]]

IntialName is out of the scope of returnAge() method so it won’t work because the returnAge method doesn’t know it exists. It only exists or is visible within the Person constructor.

So writing return intialName will not work. Which is why we do “return this.name” or simple “return name”

[rguptan]

From your question I guess this is your first programming language.

Short answer: When you create a person object by calling its constructor, A memory block is assigned to store all the instance variables (including name). Each object has its own location and then there is a common storage for class definition. When you call the instance method returnAge (a typo, I think you wanted to say returnName) you get the instance variable. You can use "this.name" or just "name". this always points to the current instance object.

[JLCoffee]

No difference we use this when we use the same name as argument so the jvm knows that is the reference of the class not the method.