Java Primitives

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java.lang
Primitive Data Types
boolean either true of false (unlike C/C++)
char 16 bit Unicode character
byte 8 bit signed integer
short 16 bit signed integer
int 32 bit signed integer
long 64 bit signed integer
float 32 bit IEEE real number
double 64 bit IEEE real number
Note the class-equiv (Character, Integer, Long, Float, Double) and short/byte promoted to int for calc.