Typecasting of the variables

Question

typecasting means which convert the one data type into another but boolean never change into another

Answer 1

Avinesh The Python bool is a bit controversial IMO. In fact, it took over 10 years before Python eventually implemented bool as a built-in data type.

The decision making details for this PEP make for an interesting read:

https://www.python.org/dev/peps/pep-0285/

Answer 2

You can say that it is a design choice.
A boolean value is basically a representation of a bit which is either 1 or 0. Now converting this to any other data type could raise ambiguity and be prone to errors. That is just my assumption.

You can read this for understanding, also under "casting conversions" checkout the first tabulation which shows that boolean cannot be casted.
https://docs.oracle.com/javase/specs/jls/se7/html/jls-5.html#jls-5.4

Answer 3

Sakshi Sharma In order for typecasting to work, the source and target types would need to be part of the same inheritance hierarchy or shared interfaces.

In this context, which types would you expect Boolean to share in its inheritance hierarchy / common interfaces?

Answer 4

Unlike in Python where boolean type inherits from integer type, Java doesn't have this inheritance I guess.

A workaround when necessary could be achieved using a ternary operator.

boolean bool = true;
int value = bool ? 1 : 0;

Answer 5

Why would you want to cast a boolean I'm just curious I cant think of any use for it 🤔

boolean a = true; //boolean true

String b = a+""; //converted to string so now the boolean becomes an object which has methods so this casts it in a sort of way but it's not the same value as above so its converted rather then casted.

int c = b.length();//string converted to int, again this is a new value being stored so it not the same as variable a or b but value can be casted to double, or wrapped inside Interger ect..

a = c==b.length(); //gets the original boolean back into the variable, again this is a new value replacing the existing value of a which cant be casted.

System.out.print(a); //prints boolean true

my guess is that boolean can be manipulated through other class methods so type casting isnt necessary.

Answer 6

It is optional but I see no reason to Typecast boolean