{"id":8833,"date":"2022-11-28T15:50:16","date_gmt":"2022-11-28T07:50:16","guid":{"rendered":"http:\/\/123.57.164.21\/?p=8833"},"modified":"2022-11-28T15:50:16","modified_gmt":"2022-11-28T07:50:16","slug":"java%e7%9a%84char%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=8833","title":{"rendered":"Java\u7684char\u7c7b\u578b"},"content":{"rendered":"\n<p><strong>\u4e00\u3001Char\u4ecb\u7ecd<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u5b57\u7b26\u578b\u6570\u636e\u7c7b\u578b\u3002\u7528\u4e8e\u5b58\u653e\u5355\u4e2a\u5b57\u7b26\u3002\u7528\u5355\u5f15\u53f7\u3010&#8217; &#8216;\u3011\u62ec\u4f4f<\/p>\n\n\n\n<p>2\u5b57\u8282\uff0c16\u4f4d\u3002char\u5728java\u4e2d\u662f16\u4f4d\uff0c\u56e0\u4e3ajava\u7528\u7684\u662fUnicode\u3002\u4e00\u4e2a16\u4f4d\u7684\u7f16\u7801\u6240\u80fd\u4ea7\u751f\u7684\u5b57\u7b26\u53ea\u670965536\u4e2a\u3002<\/p>\n\n\n\n<p>Unicode\u7801\u5305\u62ecASCII\u7801\u3002\u5927\u591a\u6570\u8ba1\u7b97\u673a\u91c7\u7528ASCII\uff08\u7f8e\u56fd\u6807\u51c6\u4fe1\u606f\u4ea4\u6362\u7801\uff09\uff0c\u5b83\u662f\u8868\u793a\u6240\u6709\u5927\u5c0f\u5199\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u6807\u70b9\u7b26\u53f7\u548c\u63a7\u5236\u5b57\u7b26\u76848\u4f4d\u7f16\u7801\u8868\u3002\u4ece&#8217;\\u0000&#8217;\u5230&#8217;\\u007F&#8217;\u5bf9\u5e94128\u4e2aASCII\u5b57\u7b26\u3002<br><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-328-1024x777.png\" alt=\"\" class=\"wp-image-8834\" width=\"427\" height=\"324\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-328-1024x777.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-328-300x228.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-328-768x583.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-328-830x630.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-328-230x174.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-328-350x266.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-328-480x364.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-328.png 1392w\" sizes=\"(max-width: 427px) 100vw, 427px\" \/><\/figure><\/div>\n\n\n\n<p><strong>\u4e8c\u3001char\u8d4b\u503c<\/strong><\/p>\n\n\n\n<p><strong>1. \u6982\u8ff0<\/strong><\/p>\n\n\n\n<p>\u56e0\u4e3achar\u662f16\u4f4d\u7684\uff0c\u91c7\u53d6\u7684Unicode\u7684\u7f16\u7801\u65b9\u5f0f\uff0c\u6240\u4ee5char\u5c31\u6709\u4ee5\u4e0b\u7684\u521d\u59cb\u5316\u65b9\u5f0f\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">char c='c'; \/\/\u5b57\u7b26\uff0c\u53ef\u4ee5\u662f\u6c49\u5b57\uff0c\u56e0\u4e3a\u662fUnicode\u7f16\u7801\u3002\u9700\u8981\u52a0\u5355\u5f15\u53f7\u3002\n\nchar c=\u5341\u8fdb\u5236\u6570\uff0c\u516b\u8fdb\u5236\u6570\uff0c\u5341\u516d\u8fdb\u5236\u6570\u90fd\u53ef\u4ee5; \/\/\u53ef\u4ee5\u7528\u6574\u6570\u8d4b\u503c\u3010\u6574\u6570\u8303\u56f4\uff1a0~65535\u3011\u3002\u8f93\u51fa\u5b57\u7b26\u7f16\u7801\u8868\u4e2d\u5bf9\u5e94\u7684\u5b57\u7b26\u3002\n\nchar c='\\u\u6570\u5b57'; \/\/\u7528\u5b57\u7b26\u7684\u7f16\u7801\u503c\u6765\u521d\u59cb\u5316\uff0c\u5982\uff1achar='\\0',\u8868\u793a\u7ed3\u675f\u7b26\uff0c\u5b83\u7684ascll\u7801\u662f0\uff0c\u8fd9\u53e5\u8bdd\u7684\u610f\u601d\u548c char c=0 \u662f\u4e00\u4e2a\u610f\u601d\u3002\n<\/pre>\n\n\n\n<p><strong>2.\u00a0 \u5b9e\u4f8b<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">        char x1 = 65;\/\/\u4e3achar\u7c7b\u578b\u53d8\u91cfx1 \u8d4b\u503c\u5e38\u91cf\u503c 65\u3002\u5341\u8fdb\u5236\u7f16\u7801\u7684ASCII\u7801\u8868\u4e2d\u5b57\u7b26'A'\u5bf9\u5e94\u7684\u662f65\n        char x11 = 41;\/\/')'\u7684ASCII\u7801\u4e3a\u5341\u8fdb\u5236\u6570\u662f41\n        char x12 = 101;\/\/'e'\u7684ASCII\u7801\u4e3a\u5341\u8fdb\u5236\u6570\u662f101\n \n        char x2 = 'A';\/\/ASCII\u5b57\u7b26 'A' \u7684Unicode\u7801\u662f0041\u3002zi\n        char x3 = '\\u0041';\n\/\/----------------------------------------------------------------\n        int y1 = x1;\n        int y11 = x11;\n        int y12 = x12;\n \n        int y2 = x2;\n        int y3 = x3;\n\/\/----------------------------------------------------------------\n        System.err.println(\"x1=\"+x1+\", x1\u7684int\u503c=\"+y1);\n        System.err.println(\"x11=\"+x11+\", x11\u7684int\u503c=\"+y11);\n        System.err.println(\"x12=\"+x12+\", x12\u7684int\u503c=\"+y12);\n        \n        System.err.println(\"x2=\"+x2+\", x2\u7684int\u503c=\"+y2);\n        System.err.println(\"x3=\"+x3+\", x3\u7684int\u503c=\"+y3);\n<\/pre>\n\n\n\n<pre class=\"wp-block-preformatted\">x1=A, x1\u7684int\u503c=65\nx11=), x11\u7684int\u503c=41\nx12=e, x12\u7684int\u503c=101\nx2=A, x2\u7684int\u503c=65\nx3=A, x3\u7684int\u503c=65<\/pre>\n\n\n\n<p><strong>\u4e09\u3001char\u8fd0\u7b97<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>\u00a0 char\u7c7b\u578b\u662f\u53ef\u4ee5\u8fd0\u7b97\u7684\u56e0\u4e3achar\u5728ASCII\u7b49\u5b57\u7b26\u7f16\u7801\u8868\u4e2d\u6709\u5bf9\u5e94\u7684\u6570\u503c\u3002<\/p>\n\n\n\n<p><strong>1. \u603b\u7ed3<\/strong><\/p>\n\n\n\n<p>\u5728JAVA\u4e2d\uff0c\u5bf9char\u7c7b\u578b\u5b57\u7b26\u8fd0\u884c\u65f6\uff0c\u76f4\u63a5\u5f53\u505aASCII\u8868\u5bf9\u5e94\u7684\u6574\u6570\u6765\u5bf9\u5f85\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">\uff081\uff09char+char\uff0cchar+int\u2014\u2014\u7c7b\u578b\u5747\u63d0\u5347\u4e3aint\uff0c\u9644\u503cchar\u53d8\u91cf\u540e\uff0c\u8f93\u51fa\u5b57\u7b26\u7f16\u7801\u8868\u4e2d\u5bf9\u5e94\u7684\u5b57\u7b26\u3002\n    char m=\u2018a\u2019+1;\u3000\u3000 -->b \/\/\u63d0\u5347\u4e3aint\uff0c\u8ba1\u7b97\u7ed3\u679c98\u5bf9\u5e94\u7684\u5b57\u7b26\u662fb\u3002\n\n\uff082\uff09\u81ea\u589e\u548c\u81ea\u51cf\u64cd\u4f5c\u7b26\u53ef\u4ee5\u7528\u5728char\u7c7b\u578b\u53d8\u91cf\u4e0a\uff0c\u8fd9\u4f1a\u5f97\u5230\u5b57\u7b26\u4e4b\u524d\u6216\u8005\u4e4b\u540e\u7684Unicode\u5b57\u7b26\u3002\n    char x1 = 'A';\n    System.err.println(++x1); \/\/\u8f93\u51faB<\/pre>\n\n\n\n<p><strong>2. \u4f8b\u5b50<\/strong><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/123.57.164.21\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-329-1024x349.png\" alt=\"\" class=\"wp-image-8837\" width=\"588\" height=\"200\" srcset=\"https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-329-1024x349.png 1024w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-329-300x102.png 300w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-329-768x262.png 768w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-329-830x283.png 830w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-329-230x78.png 230w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-329-350x119.png 350w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-329-480x164.png 480w, https:\/\/92it.top\/wp-content\/uploads\/2022\/11\/\u56fe\u7247-329.png 1496w\" sizes=\"(max-width: 588px) 100vw, 588px\" \/><\/figure><\/div>\n\n\n\n<p><strong>\u00a0\u56db\u3001\u4e3a\u4ec0\u4e48char\u7c7b\u578b\u7684\u53d8\u91cf\u53ef\u4ee5\u8d4b\u503c\u4e3a\u6574\u578b\u6570\u5b57\uff1f<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>char\u5728java\u4e2d\u662funicode\u7f16\u7801\u3002Java\u4e2d\u5bf9char\u578b\u6570\u636e\uff0c\u5728\u5185\u5b58\u4e2d\u5b58\u7684\u5c31\u662f\u6574\u6570\uff0c\u5bf9\u5e94\u4e00\u5f20ASCII\u7801\u8868\u3002<\/p>\n\n\n\n<ul><li>\u6bd4\u5982\u8bf4\u5b57\u7b26\u77e5 \u2018A\u2019 \u5bf9\u5e94\u7684\u662f65\uff0c\u5b57\u7b26 \u2018a\u2019 \u5bf9\u5e94\u7684\u662f97 \uff0c\u6240\u4ee5char c1 = \u2018A\u2019 ; \u7b49\u6548\u4e8e char c1 = 65 ;<\/li><\/ul>\n\n\n\n<p>\u6b63\u662f\u56e0\u4e3a\u8fd9\u6837\uff0c\u6240\u4ee5\u5b57\u7b26\u578b\u6570\u636e\u65e2\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u5b57\u7b26\u4f7f\u7528\uff0c\u4e5f\u53ef\u4ee5\u4f5c\u4e3a\u4e00\u4e2a\u6574\u6570\u4f7f\u7528\uff0c\u6240\u4ee5char\u578b\u6570\u636e\u53ef\u4ee5\u548cint\u578b\u6570\u636e\u8fdb\u884c\u8fd0\u7b97\uff01<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    \u6bd4\u5982 \u2018A\u2019 + 1 \u7684\u7ed3\u679c\u5982\u679c\u7528char\u578b\u53d8\u91cf\u63a5\u6536\u5c31\u662f \u2018B\u2019 \uff0c \u7528int\u578b\u53d8\u91cf\u63a5\u6536\u5c31\u662f66\n    char c = \u2018A\u2019+1; \u6700\u540ec\u4e3a\u2019B\u2019\n    int i = \u2018A\u2019 + 1 ; \u6700\u540ei\u4e3a 66<\/pre>\n\n\n\n<p>\u867d\u7136char\u578b\u662f\u4ee5\u6574\u6570\u5b58\u50a8\uff0c\u4f46\u662f\u548cint\u578b\u8fd8\u662f\u6709\u4e00\u5b9a\u533a\u522b\u7684\uff0c\u8868\u73b0\u5728\u53d6\u503c\u8303\u56f4\u4e0a\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">    char\u578b \u53602\u4e2a\u5b57\u8282 \u65e0\u7b26\u53f7 \u8303\u56f4\u662f0~65535\uff0c\u6240\u4ee5char c = 65536 \u5c31\u4f1a\u62a5\u9519\u4e86\uff0c\u4e13\u56e0\u4e3a\u8d8a\u754c\u4e86<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001Char\u4ecb\u7ecd \u5b57\u7b26\u578b\u6570\u636e\u7c7b\u578b\u3002\u7528\u4e8e\u5b58\u653e\u5355\u4e2a\u5b57\u7b26\u3002\u7528\u5355\u5f15\u53f7\u3010&#8217; &#8216;\u3011\u62ec\u4f4f 2\u5b57\u8282\uff0c1 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"_links":{"self":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/8833"}],"collection":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8833"}],"version-history":[{"count":3,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/8833\/revisions"}],"predecessor-version":[{"id":8838,"href":"https:\/\/92it.top\/index.php?rest_route=\/wp\/v2\/posts\/8833\/revisions\/8838"}],"wp:attachment":[{"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8833"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8833"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/92it.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8833"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}