One of the questions in the code challenge for building the MVP confused me!

Question

At the MVP challenge we are asked to create a new constant that stores the max number of characters in a Twitter tweet. It is supposed to be unchangeable and accessible right off the class.
E.g. public static final int MAX_CHAR = 140;
The second challenge asks us to add a method that returns the remaining characters available based on the length of what is in mText.
E.g. public int remainingChar() {
                            return MAX_CHAR - mText.length();
    }
}
I completed the challenge, but had a question on the logic side of things. I may be overthinking this but is there not a Data Type mismatch between an int and a String? For instance, whatever I type is stored into mText as a String and using the .length() method returns the length of the sequence of characters.  How does a branching statement, 'return', compile the code successfully?
Is the .length() method returning an integer?

Kartik Gupta · Accepted Answer

Hi Jae ! I would like to tell you that you are thinking absolutely right ,  remember how we use ' . ' to access object properties and behaviours i.e. member variables and methods . You are actually doing just that , by using .length() , You are actually calling the length method of the object of class String  which is then returning an integer. You can see the official doc file  : https://docs.oracle.com/javase/8/docs/api/java/lang/String.html
here they have clearly stated that .length method returns an int. Hope that clears everything.!!!Happy Learning

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Jae Kim

Jae Kim

One of the questions in the code challenge for building the MVP confused me!

1 Answer

Kartik Gupta

Kartik Gupta

Jae Kim

Jae Kim