What wrapper(s) do you know?

I know the standard wrapper classes for primitive types included in the java.lang package:

• Byte
• Short
• Integer
• Long
• Float
• Double
• Character
• Boolean

Each of them encapsulates the corresponding primitive value and provides useful methods, for example, for type conversion, comparison, or working with string representations. They are necessary for using primitives in collections that work only with objects, as well as for null values.