Java Data Base type

Byte (byte 8-128-127 0
Shot (short-integer) 16-32768-32768 0
int (integral type) 32-2147483648-2147483648 0
Long (length) 64-9233372036854477808-9233372036854477808 0
Float (float type) 32-3.40292347e+38-3.40292347e+38 0.0f
Double (dual precision) 64-1.79769313486231570e+308-1.79769313486231570e+308 0.0d
char (character type) + ' \u0000-u\ffff ' \u0000 '
Boolean (Boolean) 1 True/false false

Data that can be allocated directly in the stack is the base data type.
Reference data type: is a reference to the data in the stack, but his object is in the heap.
The default integer type in Java is type int, and if you want to define float type, add L or L to the value.
The default float is also a double-precision floating point, and if you want to define float type, add F or F to the value.

automatic conversion of basic data Types Byte->short,char, int, longDouble, floatfloat, intDouble, Long

Java Data Base type