All language subtitles for 004 Overriding toString()_en

A class can override methods that it inherits.

Previously, you saw that the object class is the common ancestor of every class, so every class inherits

methods from the object class.

Now, clients can customize it can override methods that inherits.

So in this lesson, you're going to override the two string method.

Inside main Java, call to string from one of the objects and print the results again, we haven't defined

a two string method inside the person class.

So where is the two string coming from?

Remember that the object class is the ancestor of every single class.

So by default, our person class is going to inherit this two string method.

So let's use it and see what happens.

Run the debugger.

And here it basically returns the identity of the object, the name of the class, followed by an ad

symbol and he hexadecimal representation of the object has code.

So back here, if I press next.

It shows us what we expect the name of the class, followed by the add symbol and the objects code as

a hexadecimal string.

OK, now, instead of printing the hexadecimal, it would be nice if printing the object print its fields'.

That's why we need to override the two string method override means to change the logic of an inherited

method.

You're going to customize you're going to override the two string method for the person class and you

already know how to override a tutoring method.

You've done it a million times before.

All we have to do is replicate the signature of the two string method we're inheriting.

And here we can write whatever we want.

We could return high.

But the point is we overrode the two string method and Java is going to use this one instead.

So try it out, run the debugger.

And it calls the tutoring method that we overrode.

But there's a much easier way to override to string, just right to string and let Intellisense autocomplete

the method for you and beautiful once again, don't worry about super will cover it later.

And now we can just customise the two string method just like we always do.

We'll just return the objects fields as part of a long string.

And now remember, the override annotation just means we're overriding a method that we inherited.

You don't have to include it.

In the past, we never had it.

But it's good practice to leave it because if you misspell the method, it's going to throw an error

and say there's no method string whity to override.

So just leaving it as good practice, it's going to prevent potential errors.

Now, if we rerun the code to the person, object calls the overwritten it to string method.

And it prints our fields.

But recall, we don't need to explicitly call the tutoring method when you print an object java smart

enough to internally call it.

Let's recap, you overrode the two Tshering method.

To override means to change the logic of an inherited method when you override a method, Java calls

that one instead.