Which of the following is a non-primitive data-type in java?(A) boolean (B) character (C) array (D) float (E) double (F) long

The non-primitive data type in Java from the given options is (C) array.

Here's why:

In Java, data types are divided into two groups: primitive and non-primitive.

Primitive data types include boolean, char, byte, short, int, long, float, and double, which are predefined by the language and named by a keyword. So, options (A) boolean, (B) character, (D) float, (E) double, and (F) long are all primitive data types.

Non-primitive data types include Classes, Interfaces, and Arrays, which are created by the programmer and is not defined by Java (except for String). Therefore, the only non-primitive data type in the given options is (C) array.