ASCII and Unicode

《编程导论（Java）·1.2.3 五种Java元素》中提到：

Java支持Unicode字符集(Unicode character set)。它以16位来表示一个字符，其中最前的128个字符则是ASCII( The American StandardCode form Information Interchange)码字符。

Java中的标识符、注释、字符文字、字符串文字可以使用Unicode，而关键字、操作符等其他Java元素则使用ASCII中的(一些)字符。

代码库codes中的相关代码

package tips;
import static tips.Print.*;

/**
 *ASCII字符
 * @author yqj2065
 * @version 2011.10
 */
public class Ascii{
     //打印Ascii，其中不可打印字符，自然看不见。
     public static void plintAscii(){
        for(byte i =0;i< 128 && i>=0;i++){
            System.out.println(i+" "+ (char)i);
        }
    }
    /**
     * Unicode字符集(Unicode character set),以16位来表示一个字符，
     * 其中最前的128个字符则是ASCII.
     * 测试参数：48、65、97、130、258、20005
     * 将形参改为byte，测试[0,127]数据！
     */
    public static void testUnicode(int i){
        //int[] data = {};
        pln(i+" "+ (char)i);
    }    
}

ASCII and Latin-1 字符表

ASCII and Latin-1 Character Table
Char	Dec	Hex	Octal	HTML	Notes
^@	0	0x00	0000	^@	NUL nul
^A	1	0x01	0001	^A	SOH start of header
^B	2	0x02	0002	^B	STX start of text
^C	3	0x03	0003	^C	ETX end of text
^D	4	0x04	0004	^D	EOT end of transmission
^E	5	0x05	0005	^E	ENQ enquiry
^F	6	0x06	0006	^F	ACK acknowledege
^G	7	0x07	0007	^G	BEL bell
^H	8	0x08	0010	^H	BS backspace [/b]
^I	9	0x09	0011	^I	HT horizonal tab [/t]
^J	10	0x0a	0012	^J	LF line feed [/n]
^K	11	0x0b	0013	^K	VT vertical tab
^L	12	0x0c	0014	^L	FF form feed [/f]
^M	13	0x0d	0015	^M	CR carriage return [/r]
^N	14	0x0e	0016	^N	SO shift out
^O	15	0x0f	0017	^O	SI shift in
^P	16	0x10	0020	^P	DLE data link escape
^Q	17	0x11	0021	^Q	DC1 device control 1, XON resume transmission
^R	18	0x12	0022	^R	DC2 device control 2
^S	19	0x13	0023	^S	DC3 device control 3, XOFF pause transmission
^T	20	0x14	0024	^T	DC4 device control 4
^U	21	0x15	0025	^U	NAK negative acknowledge
^V	22	0x16	0026	^V	SYN synchronise
^W	23	0x17	0027	^W	ETB end text block
^X	24	0x18	0030	^X	CAN cancel
^Y	25	0x19	0031	^Y	EM end message
^Z	26	0x1a	0032	^Z	SUB substitute
^[	27	0x1b	0033	^[	ESC escape
^/	28	0x1c	0034	^/	FS file separator, usually used to separate groups of records.
^]	29	0x1d	0035	^]	GS group separator, usually used to separate fields.
^^	30	0x1e	0036	^^	RS record separator, usually used to separate records.
^_	31	0x1f	0037	^_	US unit separator, usually used to separate subfields.
	32	0x20	0040	 	space
!	33	0x21	0041	!	bang, exclamation
"	34	0x22	0042	"	quote
#	35	0x23	0043	#	sharp, number sign
$	36	0x24	0044	$	dollar sign
%	37	0x25	0045	%	percent
&	38	0x26	0046	&	ampersand
'	39	0x27	0047	'	apostrophe
(	40	0x28	0050	(	left parenthesis
)	41	0x29	0051	)	right parenthesis
*	42	0x2a	0052	*	star, asterisk
+	43	0x2b	0053	+	plus
,	44	0x2c	0054	,	comma
-	45	0x2d	0055	-	minus
.	46	0x2e	0056	.	period
/	47	0x2f	0057	/	slash, not backslash!
0	48	0x30	0060	0	digit 0
1	49	0x31	0061	1	digit 1
2	50	0x32	0062	2	digit 2
3	51	0x33	0063	3	digit 3
4	52	0x34	0064	4	digit 4
5	53	0x35	0065	5	digit 5
6	54	0x36	0066	6	digit 6
7	55	0x37	0067	7	digit 7
8	56	0x38	0070	8	digit 8
9	57	0x39	0071	9	digit 9
:	58	0x3a	0072	:	colon
;	59	0x3b	0073	;	semicolon
<	60	0x3c	0074	&lt;	less than
=	61	0x3d	0075	=	equals
>	62	0x3e	0076	&gt;	greater than
?	63	0x3f	0077	?	question mark
@	64	0x40	0100	@	at sign
A	65	0x41	0101	A	upper case A
B	66	0x42	0102	B	upper case B
C	67	0x43	0103	C	upper case C
D	68	0x44	0104	D	upper case D
E	69	0x45	0105	E	upper case E
F	70	0x46	0106	F	upper case F
G	71	0x47	0107	G	upper case G
H	72	0x48	0110	H	upper case H
I	73	0x49	0111	I	upper case I
J	74	0x4a	0112	J	upper case J
K	75	0x4b	0113	K	upper case K
L	76	0x4c	0114	L	upper case L
M	77	0x4d	0115	M	upper case M
N	78	0x4e	0116	N	upper case N
O	79	0x4f	0117	O	upper case O
P	80	0x50	0120	P	upper case P
Q	81	0x51	0121	Q	upper case Q
R	82	0x52	0122	R	upper case R
S	83	0x53	0123	S	upper case S
T	84	0x54	0124	T	upper case T
U	85	0x55	0125	U	upper case U
V	86	0x56	0126	V	upper case V
W	87	0x57	0127	W	upper case W
X	88	0x58	0130	X	upper case X
Y	89	0x59	0131	Y	upper case Y
Z	90	0x5a	0132	Z	upper case Z
[	91	0x5b	0133	[	left square bracket
/	92	0x5c	0134	/	backslash, not slash!
]	93	0x5d	0135	]	right square bracket
^	94	0x5e	0136	^	hat, circumflex
_	95	0x5f	0137	_	underscore
`	96	0x60	0140	`	grave, rhymes with have
a	97	0x61	0141	a	lower case a
b	98	0x62	0142	b	lower case b
c	99	0x63	0143	c	lower case c
d	100	0x64	0144	d	lower case d
e	101	0x65	0145	e	lower case e
f	102	0x66	0146	f	lower case f
g	103	0x67	0147	g	lower case g
h	104	0x68	0150	h	lower case h
i	105	0x69	0151	i	lower case i
j	106	0x6a	0152	j	lower case j
k	107	0x6b	0153	k	lower case k
l	108	0x6c	0154	l	lower case l
m	109	0x6d	0155	m	lower case m
n	110	0x6e	0156	n	lower case n
o	111	0x6f	0157	o	lower case o
p	112	0x70	0160	p	lower case p
q	113	0x71	0161	q	lower case q
r	114	0x72	0162	r	lower case r
s	115	0x73	0163	s	lower case s
t	116	0x74	0164	t	lower case t
u	117	0x75	0165	u	lower case u
v	118	0x76	0166	v	lower case v
w	119	0x77	0167	w	lower case w
x	120	0x78	0170	x	lower case x
y	121	0x79	0171	y	lower case y
z	122	0x7a	0172	z	lower case z
{	123	0x7b	0173	{	left curly brace
|	124	0x7c	0174	|	vertical bar
}	125	0x7d	0175	}	right curly brace
~	126	0x7e	0176	~	tilde
	127	0x7f	0177	&#127;	DEL delete
€	128	0x80	0200	&#128;
	129	0x81	0201	&#129;
‚	130	0x82	0202	&#130;
ƒ	131	0x83	0203	&#131;
„	132	0x84	0204	&#132;
…	133	0x85	0205	&#133;
†	134	0x86	0206	&#134;
‡	135	0x87	0207	&#135;
ˆ	136	0x88	0210	&#136;
‰	137	0x89	0211	&#137;
Š	138	0x8a	0212	&#138;
‹	139	0x8b	0213	&#139;
Œ	140	0x8c	0214	&#140;
	141	0x8d	0215	&#141;
Ž	142	0x8e	0216	&#142;
	143	0x8f	0217	&#143;
	144	0x90	0220	&#144;
‘	145	0x91	0221	&#145;
’	146	0x92	0222	&#146;
“	147	0x93	0223	&#147;
”	148	0x94	0224	&#148;
•	149	0x95	0225	&#149;
–	150	0x96	0226	&#150;
—	151	0x97	0227	&#151;
˜	152	0x98	0230	&#152;
™	153	0x99	0231	&#153;
š	154	0x9a	0232	&#154;
›	155	0x9b	0233	&#155;
œ	156	0x9c	0234	&#156;
	157	0x9d	0235	&#157;
ž	158	0x9e	0236	&#158;
Ÿ	159	0x9f	0237	&#159;
	160	0xa0	0240	&#160;
¡	161	0xa1	0241	&#161;	PostScript (¡) exclamdown
¢	162	0xa2	0242	&#162;	PostScript (¢) cent
£	163	0xa3	0243	&#163;	PostScript (£) sterling
¤	164	0xa4	0244	&#164;	PostScript (/) fraction
¥	165	0xa5	0245	&#165;	PostScript (¥) yen
¦	166	0xa6	0246	&#166;	PostScript (ƒ) florin
§	167	0xa7	0247	&#167;	PostScript (§) section
¨	168	0xa8	0250	&#168;	PostScript (¤) currency
©	169	0xa9	0251	&#169;	PostScript (') quotesingle
ª	170	0xaa	0252	&#170;	PostScript (“) quotedblleft
«	171	0xab	0253	&#171;	PostScript («) guillemotleft
¬	172	0xac	0254	&#172;	PostScript (<) guilsinglleft
­	173	0xad	0255	&#173;	PostScript (>) guilsinglright
®	174	0xae	0256	&#174;	PostScript fi ligature
¯	175	0xaf	0257	&#175;	PostScript fl ligature;
°	176	0xb0	0260	&#176;
±	177	0xb1	0261	&#177;	PostScript (–) endash
²	178	0xb2	0262	&#178;	PostScript (†) dagger
³	179	0xb3	0263	&#179;	PostScript (·) periodcentered
´	180	0xb4	0264	&#180;
µ	181	0xb5	0265	&#181;
¶	182	0xb6	0266	&#182;	PostScript (¶) paragraph
·	183	0xb7	0267	&#183;	PostScript (•) bullet
¸	184	0xb8	0270	&#184;	PostScript (,) quotesinglbase
¹	185	0xb9	0271	&#185;	PostScript („) quotedblbase
º	186	0xba	0272	&#186;	PostScript (”) quotedblright
»	187	0xbb	0273	&#187;	PostScript (») guillemotright
¼	188	0xbc	0274	&#188;	PostScript (…) ellipsis
½	189	0xbd	0275	&#189;	PostScript (‰) perthousand
¾	190	0xbe	0276	&#190;
¿	191	0xbf	0277	&#191;	PostScript (¿) questiondown
À	192	0xc0	0300	&#192;
Á	193	0xc1	0301	&#193;	PostScript (`) grave
Â	194	0xc2	0302	&#194;	PostScript (´) acute
Ã	195	0xc3	0303	&#195;	PostScript (^) circumflex
Ä	196	0xc4	0304	&#196;	PostScript (~) tilde
Å	197	0xc5	0305	&#197;	PostScript (¯) macron, overbar accent
Æ	198	0xc6	0306	&#198;	PostScript (u) breve, flattened u-shaped accent
Ç	199	0xc7	0307	&#199;	PostScript (·) dotaccent
È	200	0xc8	0310	&#200;	PostScript (¨) dieresis
É	201	0xc9	0311	&#201;
Ê	202	0xca	0312	&#202;	PostScript (°) ring
Ë	203	0xcb	0313	&#203;	PostScript (¸) cedilla
Ì	204	0xcc	0314	&#204;
Í	205	0xcd	0315	&#205;	PostScript (”) hungarumlaut
Î	206	0xce	0316	&#206;	PostScript (,) ogonek, reverse comma
Ï	207	0xcf	0317	&#207;	PostScript (v) caron, flattened v-shaped accent
Ð	208	0xd0	0320	&#208;	PostScript (—) emdash
Ñ	209	0xd1	0321	&#209;
Ò	210	0xd2	0322	&#210;
Ó	211	0xd3	0323	&#211;
Ô	212	0xd4	0324	&#212;
Õ	213	0xd5	0325	&#213;
Ö	214	0xd6	0326	&#214;
×	215	0xd7	0327	&#215;
Ø	216	0xd8	0330	&#216;
Ù	217	0xd9	0331	&#217;
Ú	218	0xda	0332	&#218;
Û	219	0xdb	0333	&#219;
Ü	220	0xdc	0334	&#220;
Ý	221	0xdd	0335	&#221;
Þ	222	0xde	0336	&#222;
ß	223	0xdf	0337	&#223;
à	224	0xe0	0340	&#224;
á	225	0xe1	0341	&#225;	PostScript (Æ) AE
â	226	0xe2	0342	&#226;
ã	227	0xe3	0343	&#227;	PostScript (ª) ordfeminine
ä	228	0xe4	0344	&#228;
å	229	0xe5	0345	&#229;
æ	230	0xe6	0346	&#230;
ç	231	0xe7	0347	&#231;
è	232	0xe8	0350	&#232;	PostScript (L/) Lslash, L with / overstrike
é	233	0xe9	0351	&#233;	PostScript (Ø) Oslash
ê	234	0xea	0352	&#234;	PostScript (Œ) OE
ë	235	0xeb	0353	&#235;	PostScript (º) ordmasculine
ì	236	0xec	0354	&#236;
í	237	0xed	0355	&#237;
î	238	0xee	0356	&#238;
ï	239	0xef	0357	&#239;
ð	240	0xf0	0360	&#240;
ñ	241	0xf1	0361	&#241;	PostScript (æ) ae
ò	242	0xf2	0362	&#242;
ó	243	0xf3	0363	&#243;
ô	244	0xf4	0364	&#244;
õ	245	0xf5	0365	&#245;	PostScript (1) dotlessi, i without dot
ö	246	0xf6	0366	&#246;
÷	247	0xf7	0367	&#247;
ø	248	0xf8	0370	&#248;	PostScript (l/) l with / overstrike
ù	249	0xf9	0371	&#249;	PostScript (ø) oslash
ú	250	0xfa	0372	&#250;	PostScript (œ) oe
û	251	0xfb	0373	&#251;	PostScript (ß) germandbls
ü	252	0xfc	0374	&#252;
ý	253	0xfd	0375	&#253;
þ	254	0xfe	0376	&#254;
ÿ	255	0xff	0377	&#255;