{"id":115971,"date":"2024-03-23T04:51:44","date_gmt":"2024-03-22T19:51:44","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java-%e3%81%a7%e6%96%87%e5%ad%97%e5%88%97%e5%bc%8f%e3%81%ae%e5%80%a4%e3%82%92%e8%a8%88%e7%ae%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/"},"modified":"2024-03-28T15:14:26","modified_gmt":"2024-03-28T06:14:26","slug":"java-%e3%81%a7%e6%96%87%e5%ad%97%e5%88%97%e5%bc%8f%e3%81%ae%e5%80%a4%e3%82%92%e8%a8%88%e7%ae%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java-%e3%81%a7%e6%96%87%e5%ad%97%e5%88%97%e5%bc%8f%e3%81%ae%e5%80%a4%e3%82%92%e8%a8%88%e7%ae%97%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/","title":{"rendered":"Java \u3067\u6587\u5b57\u5217\u5f0f\u306e\u5024\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>Java\u3067\u306f\u3001\u6587\u5b57\u5217\u5f0f\u306e\u5024\u3092\u8a08\u7b97\u3059\u308b\u305f\u3081\u306bScriptEngine\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u6b21\u306b\u7c21\u5358\u306a\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> javax.script.ScriptEngine;\r\n<span class=\"hljs-keyword\">import<\/span> javax.script.ScriptEngineManager;\r\n<span class=\"hljs-keyword\">import<\/span> javax.script.ScriptException;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">Main<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n        <span class=\"hljs-type\">ScriptEngineManager<\/span> <span class=\"hljs-variable\">manager<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ScriptEngineManager<\/span>();\r\n        <span class=\"hljs-type\">ScriptEngine<\/span> <span class=\"hljs-variable\">engine<\/span> <span class=\"hljs-operator\">=<\/span> manager.getEngineByName(<span class=\"hljs-string\">\"JavaScript\"<\/span>);\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">expression<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"2 + 3 * 4 - 6 \/ 2\"<\/span>;\r\n        <span class=\"hljs-keyword\">try<\/span> {\r\n            <span class=\"hljs-type\">Object<\/span> <span class=\"hljs-variable\">result<\/span> <span class=\"hljs-operator\">=<\/span> engine.eval(expression);\r\n            System.out.println(expression + <span class=\"hljs-string\">\" = \"<\/span> + result);\r\n        } <span class=\"hljs-keyword\">catch<\/span> (ScriptException e) {\r\n            e.printStackTrace();\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u3053\u306e\u4f8b\u3067\u306fScriptEngineManager\u3092\u4f7f\u7528\u3057\u3066ScriptEngine\u3067\u3042\u308bJavaScript\u30a8\u30f3\u30b8\u30f3\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u6b21\u306b\u8a08\u7b97\u3057\u305f\u3044\u6587\u5b57\u5217\u5f0f\u3092expression\u5909\u6570\u306b\u4ee3\u5165\u3057\u307e\u3059\u3002\u7d9a\u3044\u3066eval()\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u5f0f\u306e\u5024\u3092\u8a08\u7b97\u3057\u3001\u7d50\u679c\u3092\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n<p>\u4e0a\u8a18\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u51fa\u529b\u7d50\u679c\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>2 + 3 * 4 - 6 \/ 2 = 10.0\r\n<\/code><\/pre>\n<p>\u3053\u306e\u65b9\u6cd5\u3067\u79c1\u305f\u3061\u306f\u6587\u5b57\u5217\u5f0f\u306e\u5024\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u306b\u6210\u529f\u3057\u307e\u3057\u305f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067\u306f\u3001\u6587\u5b57\u5217\u5f0f\u306e\u5024\u3092\u8a08\u7b97\u3059\u308b\u305f\u3081\u306bScriptEngine\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u6b21\u306b\u7c21\u5358\u306a\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002 import javax.script.ScriptEngine; import javax.script [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-115971","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java \u3067\u6587\u5b57\u5217\u5f0f\u306e\u5024\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/java-\u3067\u6587\u5b57\u5217\u5f0f\u306e\u5024\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java \u3067\u6587\u5b57\u5217\u5f0f\u306e\u5024\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"Java\u3067\u306f\u3001\u6587\u5b57\u5217\u5f0f\u306e\u5024\u3092\u8a08\u7b97\u3059\u308b\u305f\u3081\u306bScriptEngine\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u6b21\u306b\u7c21\u5358\u306a\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002 import javax.script.ScriptEngine; 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