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Use a Primitive Data Type Instead of an Object Data Type

It is recommended that you use an object only if you must use a property that is specific to this object type. If an equivalent primitive data type exists, then use the primitive. A primitive data type provides superior performance. An object data type consumes more resources than a primitive data type.

Table 15 lists primitive data types that are equivalent to object data types. For example, if you do not need to use a string-specific object or conversion method, then use the chars primitive instead of a String object.