When working with numbers, most of the time you use the primitive types in your code. For example: int i = 30; float gpa = 2.50f; byte mask = 0xff; There are, however, reasons to use objects in place of primitives, and the Java platform provides wrapper classes for each of the primitive data types. What are some reasons to use objects instead of primitive types?

It depends upon the usage and requirement of the code for to which one to go for but we can see some of the reasons where wrapper objects should be used.
One is they fail faster like when you declare an integer object and forget to initialize then that will throw an error whereas if primitive is used in the place it would have proceeded and makes it harder to identify it.
Another reason is we can then make use of them in generics, collections as we need classes like List to make the list hold data of type integer.
 
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