Null Safe Operator on Java

it's easy since PHP 8 to prevent error when code trying to access value from variable or method that has null value and set default value if the result is null. you can use ? on your code like this

$b = $a ?? 0;

it will set $b as 0 instead null. you can also use when call method from class.

$b = $a?->val();

it will set $b as null instead throwing error $a is null when call method $val.

and then i need on java. i found there is java.util.Optional class to use that has same result.

you can code like this

use java.util.Optional;

int b = Optional.ofNullable(a).orElse(0);

good luck!