Java Ch 2

primitive type

a simple data type

ex: byte, short, int, float, double

reference type

more complex data types

ex. system

expression

a computation involving values, variables, and operators that taking them together, evaluates to a value

initialization

an assignment made when you declare a variable

int count; or int count = 10;

count =10

byte

used for small integer values like 100

short

used for small integer integer values like 1000

long

used for large integer values like 1000000

float

used for floating-point number with less precision than double 36.6f

int

used for integer values

double

used for decimal numbers ex. 19.99

char

used for single characters “A”

boolean

used for true/false values

string

used for a sequence of characters (not a primitive type but commonly used “John”

JOptionPane

showConfirmDialog