Is it possible to model simple data types as objects in object-oriented programming?

Yes, in object-oriented programming, the simplest data types can be modeled as objects. In Java, for example, there are wrapper classes for primitive types, such as Integer, Double, Boolean, and others.

This allows primitive values to be used as objects, which is convenient, for example, for storing in collections that work only with objects.

Example:

int a = 5; // primitive type
Integer b = Integer.valueOf(a); // wrapper object

List<Integer> list = new ArrayList<>();
list.add(b); // cannot add int directly, but can add Integer

Thus, the simplest data types can be represented as objects, which expands their usability in OOP.