There are discussions around Integer vs int in Java. The default value of the former is null while in the latter it's 0. How about Boolean vs boolean?
A variable in my application can have 0/1 values. I would like to use boolean/Boolean and prefer not to use int. Can I use Boolean/boolean instead?
One observation: (though this can be thought of side effect)
boolean being a primitive can either say yes or no.
Boolean is an object (it can refer to either yes or no or 'don't know' i.e. null)
You can use Boolean / boolean. Simplicity is the way to go. If you do not need specific api (Collections, Streams, etc.) and you are not foreseeing that you will need them - use primitive version of it (boolean).
With primitives you guarantee that you will not pass null values.
You will not fall in traps like this. The code below throws NullPointerException (from: Booleans, conditional operators and autoboxing):
public static void main(String[] args) throws Exception {
Boolean b = true ? returnsNull() : false; // NPE on this line.
System.out.println(b);
}
public static Boolean returnsNull() {
return null;
}
Use Boolean when you need an object, eg:
Boolean is threadsafe, so you can consider this factor as well along with all other listed in answers
