[Java Basics] Java Four classes of eight basic types __java

Java has four classes of eight basic data types.

First class: integer byte short int long

Type two: float double

Category three: Logical Boolean

Class Fourth: Character Char

These four classes of eight basic data types are allocated memory space directly on the stack. These are the underlying data flow types, all the remaining reference types are stored in the heap, the references are stored in the stack, and the data is stored in the heap.

The default integer type in Java is the int type, and if you want to define a float, add L or L to the value, and the default floating-point type is also a double-precision floating-point, and if you want to define float, add F or F to the value.