2
2
.
.
2
2
D
D
a
a
t
t
a
a
T
T
y
y
p
p
e
e
s
s
I
I
n
n
f
f
o
o
[
[
R
R
]
]
Non-primitive data types are called reference types because they refer to Objects.
Primitive vs non-primitive Data Types [R]
PRIMITIVE
NON-PRIMITIVE
EXAMPLE
int
Integer
METHODS
Don't have Methods
Have Methods
VALUE
Always has a value
Can be null
NAMING
Name starts with lowercase
Name starts with uppercase
