如何从整数值打印Java中的扩展ASCII码
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【中文标题】如何从整数值打印Java中的扩展ASCII码【英文标题】：How to print the extended ASCII code in java from integer value 【发布时间】：2014-04-11 22:55:42 【问题描述】：public static void main(String[] args)
int i=153;
int j=63;
System.out.println((char)i);
System.out.println((char)j);
OUTPUT:-
?
?
我有一些想法为什么会出现这种奇怪的输出..但是谁能给我一些想法，以便我也可以打印扩展的 ASCII..
【问题讨论】：
JAVA extended ASCII table usage的可能重复 您的代码按预期工作。例如System.out.println((char)67); 将打印“C”。
Extended Ascii doesn't work in console!的可能重复
Braj 如果您将某个值设置为超过 127，那么由于某些 ASCII 限制，它将无法按预期工作......
【参考方案1】：
ASCII 153 (0x99) 不同于 Unicode U+0099（控制字符）。
解决方案
这个程序应该做你想做的事情：
public class ExtendedAscii
public static final char[] EXTENDED = 0x00C7, 0x00FC, 0x00E9, 0x00E2,
0x00E4, 0x00E0, 0x00E5, 0x00E7, 0x00EA, 0x00EB, 0x00E8, 0x00EF,
0x00EE, 0x00EC, 0x00C4, 0x00C5, 0x00C9, 0x00E6, 0x00C6, 0x00F4,
0x00F6, 0x00F2, 0x00FB, 0x00F9, 0x00FF, 0x00D6, 0x00DC, 0x00A2,
0x00A3, 0x00A5, 0x20A7, 0x0192, 0x00E1, 0x00ED, 0x00F3, 0x00FA,
0x00F1, 0x00D1, 0x00AA, 0x00BA, 0x00BF, 0x2310, 0x00AC, 0x00BD,
0x00BC, 0x00A1, 0x00AB, 0x00BB, 0x2591, 0x2592, 0x2593, 0x2502,
0x2524, 0x2561, 0x2562, 0x2556, 0x2555, 0x2563, 0x2551, 0x2557,
0x255D, 0x255C, 0x255B, 0x2510, 0x2514, 0x2534, 0x252C, 0x251C,
0x2500, 0x253C, 0x255E, 0x255F, 0x255A, 0x2554, 0x2569, 0x2566,
0x2560, 0x2550, 0x256C, 0x2567, 0x2568, 0x2564, 0x2565, 0x2559,
0x2558, 0x2552, 0x2553, 0x256B, 0x256A, 0x2518, 0x250C, 0x2588,
0x2584, 0x258C, 0x2590, 0x2580, 0x03B1, 0x00DF, 0x0393, 0x03C0,
0x03A3, 0x03C3, 0x00B5, 0x03C4, 0x03A6, 0x0398, 0x03A9, 0x03B4,
0x221E, 0x03C6, 0x03B5, 0x2229, 0x2261, 0x00B1, 0x2265, 0x2264,
0x2320, 0x2321, 0x00F7, 0x2248, 0x00B0, 0x2219, 0x00B7, 0x221A,
0x207F, 0x00B2, 0x25A0, 0x00A0 ;
public static final char getAscii(int code)
if (code >= 0x80 && code <= 0xFF)
return EXTENDED[code - 0x7F];
return (char) code;
public static final void printChar(int code)
System.out.printf("%c%n", getAscii(code));
public static void main(String[] args)
printChar(153);
printChar(63);
输出：
Ü ?
从上面的输出可以看出，预期的字符被正确打印。
概念的延伸
另外，我编写了一个程序，可以打印出扩展 Ascii 的 Unicode 值。正如您在下面的输出中看到的那样，很多字符都无法显示为原生 char。
代码：
public class ExtendedAscii
public static final char[] EXTENDED = 0x00C7, 0x00FC, 0x00E9, 0x00E2,
0x00E4, 0x00E0, 0x00E5, 0x00E7, 0x00EA, 0x00EB, 0x00E8, 0x00EF,
0x00EE, 0x00EC, 0x00C4, 0x00C5, 0x00C9, 0x00E6, 0x00C6, 0x00F4,
0x00F6, 0x00F2, 0x00FB, 0x00F9, 0x00FF, 0x00D6, 0x00DC, 0x00A2,
0x00A3, 0x00A5, 0x20A7, 0x0192, 0x00E1, 0x00ED, 0x00F3, 0x00FA,
0x00F1, 0x00D1, 0x00AA, 0x00BA, 0x00BF, 0x2310, 0x00AC, 0x00BD,
0x00BC, 0x00A1, 0x00AB, 0x00BB, 0x2591, 0x2592, 0x2593, 0x2502,
0x2524, 0x2561, 0x2562, 0x2556, 0x2555, 0x2563, 0x2551, 0x2557,
0x255D, 0x255C, 0x255B, 0x2510, 0x2514, 0x2534, 0x252C, 0x251C,
0x2500, 0x253C, 0x255E, 0x255F, 0x255A, 0x2554, 0x2569, 0x2566,
0x2560, 0x2550, 0x256C, 0x2567, 0x2568, 0x2564, 0x2565, 0x2559,
0x2558, 0x2552, 0x2553, 0x256B, 0x256A, 0x2518, 0x250C, 0x2588,
0x2584, 0x258C, 0x2590, 0x2580, 0x03B1, 0x00DF, 0x0393, 0x03C0,
0x03A3, 0x03C3, 0x00B5, 0x03C4, 0x03A6, 0x0398, 0x03A9, 0x03B4,
0x221E, 0x03C6, 0x03B5, 0x2229, 0x2261, 0x00B1, 0x2265, 0x2264,
0x2320, 0x2321, 0x00F7, 0x2248, 0x00B0, 0x2219, 0x00B7, 0x221A,
0x207F, 0x00B2, 0x25A0, 0x00A0 ;
public static void main(String[] args)
for (char c : EXTENDED)
System.out.printf("%s, ", new String(Character.toChars(c)));
输出：
Ç, ü, é, â, ä, à, å, ç, ê, ë, è, ï, î, ì, Ä, Å, É, æ, Æ, ô, ö, ò, û, ù , ÿ, Ö, Ü, ¢, £, ¥, ?, ƒ, á, í, ó, ú, ñ, Ñ, ª, º, ¿, ?, ¬, ½, ¼, ¡, «, », ? , ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ? , ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ß, ? , ?, ?, ?, µ, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ±, ?, ?, ?, ?, ÷, ?, °, ?, ·, ? , ?, ², ?, ,
参考表： (source)
Dec Hex Unicode Char Description
--- --- ------- ---- -----------------------------------
128 80 U+00C7 Ç latin capital letter c with cedilla
129 81 U+00FC ü latin small letter u with diaeresis
130 82 U+00E9 é latin small letter e with acute
131 83 U+00E2 â latin small letter a with circumflex
132 84 U+00E4 ä latin small letter a with diaeresis
133 85 U+00E0 à latin small letter a with grave
134 86 U+00E5 å latin small letter a with ring above
135 87 U+00E7 ç latin small letter c with cedilla
136 88 U+00EA ê latin small letter e with circumflex
137 89 U+00EB ë latin small letter e with diaeresis
138 8A U+00E8 è latin small letter e with grave
139 8B U+00EF ï latin small letter i with diaeresis
140 8C U+00EE î latin small letter i with circumflex
141 8D U+00EC ì latin small letter i with grave
142 8E U+00C4 Ä latin capital letter a with diaeresis
143 8F U+00C5 Å latin capital letter a with ring above
144 90 U+00C9 É latin capital letter e with acute
145 91 U+00E6 æ latin small ligature ae
146 92 U+00C6 Æ latin capital ligature ae
147 93 U+00F4 ô latin small letter o with circumflex
148 94 U+00F6 ö latin small letter o with diaeresis
149 95 U+00F2 ò latin small letter o with grave
150 96 U+00FB û latin small letter u with circumflex
151 97 U+00F9 ù latin small letter u with grave
152 98 U+00FF ÿ latin small letter y with diaeresis
153 99 U+00D6 Ö latin capital letter o with diaeresis
154 9A U+00DC Ü latin capital letter u with diaeresis
155 9B U+00A2 ¢ cent sign
156 9C U+00A3 £ pound sign
157 9D U+00A5 ¥ yen sign
158 9E U+20A7 ₧ peseta sign
159 9F U+0192 ƒ latin small letter f with hook
160 A0 U+00E1 á latin small letter a with acute
161 A1 U+00ED í latin small letter i with acute
162 A2 U+00F3 ó latin small letter o with acute
163 A3 U+00FA ú latin small letter u with acute
164 A4 U+00F1 ñ latin small letter n with tilde
165 A5 U+00D1 Ñ latin capital letter n with tilde
166 A6 U+00AA ª feminine ordinal indicator
167 A7 U+00BA º masculine ordinal indicator
168 A8 U+00BF ¿ inverted question mark
169 A9 U+2310 ⌐ reversed not sign
170 AA U+00AC ¬ not sign
171 AB U+00BD ½ vulgar fraction one half
172 AC U+00BC ¼ vulgar fraction one quarter
173 AD U+00A1 ¡ inverted exclamation mark
174 AE U+00AB « left-pointing double angle quotation mark
175 AF U+00BB » right-pointing double angle quotation mark
176 B0 U+2591 ░ light shade
177 B1 U+2592 ▒ medium shade
178 B2 U+2593 ▓ dark shade
179 B3 U+2502 │ box drawings light vertical
180 B4 U+2524 ┤ box drawings light vertical and left
181 B5 U+2561 ╡ box drawings vertical single and left double
182 B6 U+2562 ╢ box drawings vertical double and left single
183 B7 U+2556 ╖ box drawings down double and left single
184 B8 U+2555 ╕ box drawings down single and left double
185 B9 U+2563 ╣ box drawings double vertical and left
186 BA U+2551 ║ box drawings double vertical
187 BB U+2557 ╗ box drawings double down and left
188 BC U+255D ╝ box drawings double up and left
189 BD U+255C ╜ box drawings up double and left single
190 BE U+255B ╛ box drawings up single and left double
191 BF U+2510 ┐ box drawings light down and left
192 C0 U+2514 └ box drawings light up and right
193 C1 U+2534 ┴ box drawings light up and horizontal
194 C2 U+252C ┬ box drawings light down and horizontal
195 C3 U+251C ├ box drawings light vertical and right
196 C4 U+2500 ─ box drawings light horizontal
197 C5 U+253C ┼ box drawings light vertical and horizontal
198 C6 U+255E ╞ box drawings vertical single and right double
199 C7 U+255F ╟ box drawings vertical double and right single
200 C8 U+255A ╚ box drawings double up and right
201 C9 U+2554 ╔ box drawings double down and right
202 CA U+2569 ╩ box drawings double up and horizontal
203 CB U+2566 ╦ box drawings double down and horizontal
204 CC U+2560 ╠ box drawings double vertical and right
205 CD U+2550 ═ box drawings double horizontal
206 CE U+256C ╬ box drawings double vertical and horizontal
207 CF U+2567 ╧ box drawings up single and horizontal double
208 D0 U+2568 ╨ box drawings up double and horizontal single
209 D1 U+2564 ╤ box drawings down single and horizontal double
210 D2 U+2565 ╥ box drawings down double and horizontal single
211 D3 U+2559 ╙ box drawings up double and right single
212 D4 U+2558 ╘ box drawings up single and right double
213 D5 U+2552 ╒ box drawings down single and right double
214 D6 U+2553 ╓ box drawings down double and right single
215 D7 U+256B ╫ box drawings vertical double and horizontal single
216 D8 U+256A ╪ box drawings vertical single and horizontal double
217 D9 U+2518 ┘ box drawings light up and left
218 DA U+250C ┌ box drawings light down and right
219 DB U+2588 █ full block
220 DC U+2584 ▄ lower half block
221 DD U+258C ▌ left half block
222 DE U+2590 ▐ right half block
223 DF U+2580 ▀ upper half block
224 E0 U+03B1 α greek small letter alpha
225 E1 U+00DF ß latin small letter sharp s
226 E2 U+0393 Γ greek capital letter gamma
227 E3 U+03C0 π greek small letter pi
228 E4 U+03A3 Σ greek capital letter sigma
229 E5 U+03C3 σ greek small letter sigma
230 E6 U+00B5 µ micro sign
231 E7 U+03C4 τ greek small letter tau
232 E8 U+03A6 Φ greek capital letter phi
233 E9 U+0398 Θ greek capital letter theta
234 EA U+03A9 Ω greek capital letter omega
235 EB U+03B4 δ greek small letter delta
236 EC U+221E ∞ infinity
237 ED U+03C6 φ greek small letter phi
238 EE U+03B5 ε greek small letter epsilon
239 EF U+2229 ∩ intersection
240 F0 U+2261 ≡ identical to
241 F1 U+00B1 ± plus-minus sign
242 F2 U+2265 ≥ greater-than or equal to
243 F3 U+2264 ≤ less-than or equal to
244 F4 U+2320 ⌠ top half integral
245 F5 U+2321 ⌡ bottom half integral
246 F6 U+00F7 ÷ division sign
247 F7 U+2248 ≈ almost equal to
248 F8 U+00B0 ° degree sign
249 F9 U+2219 ∙ bullet operator
250 FA U+00B7 · middle dot
251 FB U+221A √ square root
252 FC U+207F ⁿ superscript latin small letter n
253 FD U+00B2 ² superscript two
254 FE U+25A0 ■ black square
255 FF U+00A0 no-break space
【讨论】：
这仅对一个代码页有效，特别是 CP437。这意味着这些是美式英语窗口控制台中的等效项，但不适用于 Linux 上的 UTF-8 xterm 或西欧的 CP850 控制台等。您必须知道终端使用的编码。跨度> 您使用char[] 代替EXTENDED 而不是int[] 有什么原因吗？
@JamesSmith：因为 char 是 2 个字节，而 int 是 4 个字节。这意味着更小的内存占用。 ref
您的好答案。我改变了我的最终代码，我修改了你的代码行：return EXTENDED[code - 0x7F];返回扩展[代码 - 0x80]； .- 我不确定这是一个错误，还是我的输入错误。
结果对我来说是一个结果。输入 128 -> 输出 ü【参考方案2】：
“扩展的 ASCII”是模糊的。 ASCII 有许多扩展，它们为 127 到 255 之间的字节值定义字形。这些被称为code pages。一些较常见的包括：
CP437，原始 IBM PC 上的标准 ISO 8859-1 也称为 Code page 1252，该编码用于大多数西欧语言版本的 Windows，但控制台除外你真的需要知道你的终端期待什么character encoding，否则你最终会打印garbage。在 Java 中，您应该能够检查 Charset.defaultCharset() (Charset documentation) 的值。
除了单字节“扩展 ASCII”代码页之外，还有更多的字符编码方法。 Unicode 需要比 255 多得多的代码点，因此经常使用各种固定宽度和可变宽度编码。这个页面好像是a good guide to character encoding in Java。
【讨论】：
【参考方案3】：String iChar = new Character((char)i).toString();
String jChar = new Character((char)j).toString();
System.out.println(iChar);
System.out.println(jChar);
【讨论】：
你可能很容易做到：String.format("%c", i)
我试过你的示例，但对我来说，Eclipse 控制台上的输出仍然是? ?，我错过了什么吗？
@sakura 你确定吗？ 153是一些特殊字符，63是“？”，检查this，尝试打印97和98，应该是“a”和“b”
@ZhenxiaoHao 是的，我是否需要在 Eclipse 上更改一些设置，才能在 Eclipse 控制台上看到使用 sysout 打印的特殊字符？
@sakura 不，与控制台无关，您可以发布您当前的代码吗？我试过了，效果很好。【参考方案4】：
如果这是终端编码问题，我相信这个答案https://***.com/a/362006/4828060
是一种快速而直接的绕过问题的方法。只需添加 -Dfile.encoding=some_encoding 给java命令的参数，
例如 java -Dfile.encoding=UTF-8 … MainClass
【讨论】：
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