Comment imprimer l'extension ASCII code en Java à partir d'une valeur entière

Question

public static void main(String[] args) { int i=153; int j=63; System.out.println((char)i); System.out.println((char)j); } OUTPUT:- ? ?

J'ai quelques idées sur la raison de cette sortie étrange. Mais quelqu'un peut-il me donner une idée afin que je puisse aussi imprimer les ASCII étendus?.

Mr. Polywhirl · Accepted Answer

ASCII 153 (0x99) est différent de Unicode U+0099 (caractère de contrôle).

Solution

Ce programme devrait faire ce que vous avez l'intention de faire:

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); } }

Sortie:

Ü
?

Comme vous pouvez le voir ci-dessus, le caractère voulu est imprimé correctement.

Extension du concept

De plus, j’ai écrit un programme qui affiche les valeurs Unicode de l’ascii étendu. Comme vous pouvez le voir dans le résultat ci-dessous, beaucoup de caractères ont du mal à s'afficher en tant que variable char.

Code:

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))); } } }

Sortie:

Ç, ü, â, â, ä, à, å, ç, ê, ë, è, ï, ì, Ä, Ä, Å, É, æ, æ, ô, ô, ò, û, ù, Ö, Ü, ¢, £, ¥,?, Ƒ, á, í, ó, ñ, Ñ, Ñ, ª, º, ¿,?, ½, ¼, ¡, «,»,?,?,?, , -, -, -, -, -, -, -, -, -, -, -, -, -, -, -, -, -, -, -, -, -, -, -, ?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?, ?,?, µ,?,?,?,?,?,?,?,?,?,?,?, ±,?,?,?,?,?,?,?, °,?, °,?,?,?, ²,?,

Table de référence: ( 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

bonsaiviking · Answer

"Extended ASCII" est nébuleux. Il existe de nombreuses extensions de ASCII qui définissent des glyphes pour les valeurs d'octet comprises entre 127 et 255. Celles-ci sont appelées pages de code . Certains des plus communs incluent:

CP437 , le standard sur les PC IBM d'origine
ISO 8859-1 aussi appelée Page de code 1252 , le codage utilisé par la plupart des versions de Windows en langues occidentales occidentales pour tout sauf la console

Vous devez vraiment savoir ce que le codage de caractères votre terminal attend, sinon vous allez imprimer garbage . En Java, vous devriez pouvoir vérifier la valeur de Charset.defaultCharset() ( Charset documentation ).

Il existe bien plus de moyens de coder des caractères que des pages de code "ASCII étendu" à un octet. Unicode nécessite beaucoup plus de points de code que 255, il existe donc divers codages à largeur fixe et à largeur variable fréquemment utilisés. Cette page semble être un bon guide pour l’encodage de caractères en Java .

Zhenxiao Hao · Answer

String iChar = new Character((char)i).toString(); String jChar = new Character((char)j).toString(); System.out.println(iChar); System.out.println(jChar);

Jo&#227;o Matos · Answer

S'il s'agit d'un problème d'encodage de terminal, je pense que cette réponse https://stackoverflow.com/a/362006/4828060

est un moyen simple et rapide de contourner le problème. Ajoutez simplement - Dfile.encoding = some_encoding aux paramètres de la commande Java,

par exemple . Java -Dfile.encoding = UTF-8… MainClass