DataType

Primitive 原始

byte, short, int, long, float, double, boolean, char。

Non-Primitive 非原始

String(字串), Array(陣列), Classes(類別)。

https://www.w3schools.com/java/java_strings.asp

https://www.w3schools.com/java/java_arrays.asp

https://www.w3schools.com/java/java_classes.asp

Document: https://www.w3schools.com/java/java_data_types.asp