Java Reference
In-Depth Information
Value
Char
Value
Char
Value
Char
Value
Char
Value
Char
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space
!
"
#
$
%
&
'
(
)
*
+
'
-
.
/
0
1
2
51
52
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55
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61
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63
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69
3
4
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9
:
;
<
70
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81
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87
88
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
89
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93
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98
99
100
101
102
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107
Y
Z
[
\
]
ˆ
-
'
a
b
c
d
e
f
g
h
i
j
k
108
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126
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
{
|
}
~
=
>
?
@
A
B
C
D
E
FIGURE C.1
A small portion of the Unicode character set
character. All of these characters are ASCII characters as well. Many of them have
fairly common and well-defined uses, while others are more general. The table in
Figure C.2 lists a small sample of the nonprintable characters.
Nonprintable characters are used in many situations to represent special condi-
tions. For example, certain nonprintable characters can be stored in a text docu-
ment to indicate, among other things, the beginning of a new line. An editor will
process these characters by starting the text that follows it on a new line, instead
of printing a symbol to the screen. Various types of computer systems use differ-
ent nonprintable characters to represent particular conditions.
Except for having no visible representation, nonprintable characters are essen-
tially equivalent to printable characters. They can be stored in a Java character
variable and be part of a character string. They are stored using 16 bits, can be
converted to their numeric value, and can be compared using relational operators.
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