We're sorry but Typeskill doesn't work properly without JavaScript enabled. Please enable it to continue.
Typeskill
J
a
v
a
u
s
e
s
a
n
a
u
t
o
m
a
t
i
c
g
a
r
b
a
g
e
c
o
l
l
e
c
t
o
r
t
o
m
a
n
a
g
e
m
e
m
o
r
y
i
n
t
h
e
o
b
j
e
c
t
l
i
f
e
c
y
c
l
e
.
T
h
e
p
r
o
g
r
a
m
m
e
r
d
e
t
e
r
m
i
n
e
s
w
h
e
n
o
b
j
e
c
t
s
a
r
e
c
r
e
a
t
e
d
,
a
n
d
t
h
e
J
a
v
a
r
u
n
t
i
m
e
i
s
r
e
s
p
o
n
s
i
b
l
e
f
o
r
r
e
c
o
v
e
r
i
n
g
t
h
e
m
e
m
o
r
y
o
n
c
e
o
b
j
e
c
t
s
a
r
e
n
o
l
o
n
g
e
r
i
n
u
s
e
.
0 WPM
0% accuracy