{"id":30957,"date":"2023-02-17T01:04:33","date_gmt":"2023-03-21T05:37:50","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8java%e4%b8%ad%e7%8e%a9%e5%89%aa%e5%88%80%e7%9f%b3%e5%a4%b4%e5%b8%83\/"},"modified":"2025-08-12T21:34:44","modified_gmt":"2025-08-12T13:34:44","slug":"%e5%9c%a8java%e4%b8%ad%e7%8e%a9%e5%89%aa%e5%88%80%e7%9f%b3%e5%a4%b4%e5%b8%83","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8java%e4%b8%ad%e7%8e%a9%e5%89%aa%e5%88%80%e7%9f%b3%e5%a4%b4%e5%b8%83\/","title":{"rendered":"\u5728Java\u4e2d\u73a9\u526a\u5200\u77f3\u5934\u5e03"},"content":{"rendered":"<p>[Q&amp;A] Java\u300c\u5909\u6570strA\u306f\u521d\u671f\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u300d\u30a8\u30e9\u30fc\u306e\u539f\u56e0 &#8211; Qiita\u306e\u4fee\u6b63<\/p>\n<h2>\u6253\u5f00JDK \u5b89\u88c5<\/p>\n<pre class=\"post-pre\"><code>apt <span class=\"nb\">install<\/span> <span class=\"nt\">-y<\/span> openjdk-14-jdk\r\n<\/code><\/pre>\n<h2>\u6e90\u4ee3\u7801<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">import<\/span> <span class=\"nn\">java.util.Random<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Janken<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">args<\/span><span class=\"o\">[])<\/span> <span class=\"o\">{<\/span>\r\n\r\n        <span class=\"nc\">Random<\/span> <span class=\"n\">rand<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Random<\/span><span class=\"o\">(<\/span><span class=\"nc\">Integer<\/span><span class=\"o\">.<\/span><span class=\"na\">valueOf<\/span><span class=\"o\">(<\/span><span class=\"n\">args<\/span><span class=\"o\">[<\/span><span class=\"mi\">0<\/span><span class=\"o\">]));<\/span>\r\n        <span class=\"kt\">int<\/span> <span class=\"n\">comA<\/span> <span class=\"o\">=<\/span> <span class=\"n\">rand<\/span><span class=\"o\">.<\/span><span class=\"na\">nextInt<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"kt\">int<\/span> <span class=\"n\">comB<\/span> <span class=\"o\">=<\/span> <span class=\"n\">rand<\/span><span class=\"o\">.<\/span><span class=\"na\">nextInt<\/span><span class=\"o\">(<\/span><span class=\"mi\">3<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">String<\/span> <span class=\"n\">strA<\/span><span class=\"o\">,<\/span> <span class=\"n\">strB<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"n\">strA<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\"<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"n\">strB<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\"<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"k\">switch<\/span><span class=\"o\">(<\/span><span class=\"n\">comA<\/span><span class=\"o\">){<\/span>\r\n            <span class=\"k\">case<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">:<\/span>\r\n                <span class=\"n\">strA<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u30b0\u30fc\"<\/span><span class=\"o\">;<\/span>\r\n                <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\r\n\r\n            <span class=\"k\">case<\/span> <span class=\"mi\">1<\/span> <span class=\"o\">:<\/span>\r\n                <span class=\"n\">strA<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u30c1\u30e7\u30ad\"<\/span><span class=\"o\">;<\/span>\r\n                <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\r\n\r\n            <span class=\"k\">case<\/span> <span class=\"mi\">2<\/span> <span class=\"o\">:<\/span>\r\n                <span class=\"n\">strA<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u30d1\u30fc\"<\/span><span class=\"o\">;<\/span>\r\n                <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\r\n\r\n            <span class=\"k\">default<\/span><span class=\"o\">:<\/span>\r\n                <span class=\"n\">strA<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\"<\/span><span class=\"o\">;<\/span>\r\n                <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"o\">}<\/span>\r\n        <span class=\"k\">switch<\/span><span class=\"o\">(<\/span><span class=\"n\">comB<\/span><span class=\"o\">){<\/span>\r\n            <span class=\"k\">case<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">:<\/span>\r\n                <span class=\"n\">strB<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u30b0\u30fc\"<\/span><span class=\"o\">;<\/span>\r\n                <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\r\n            <span class=\"k\">case<\/span> <span class=\"mi\">1<\/span> <span class=\"o\">:<\/span>\r\n                <span class=\"n\">strB<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u30c1\u30e7\u30ad\"<\/span><span class=\"o\">;<\/span>\r\n                <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\r\n            <span class=\"k\">case<\/span> <span class=\"mi\">2<\/span> <span class=\"o\">:<\/span>\r\n                <span class=\"n\">strB<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u30d1\u30fc\"<\/span><span class=\"o\">;<\/span>\r\n                <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\r\n\r\n            <span class=\"k\">default<\/span><span class=\"o\">:<\/span>\r\n                <span class=\"n\">strB<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\"<\/span><span class=\"o\">;<\/span>\r\n                <span class=\"k\">break<\/span><span class=\"o\">;<\/span>\r\n        <span class=\"o\">}<\/span>\r\n        <span class=\"k\">if<\/span><span class=\"o\">(<\/span><span class=\"n\">comA<\/span> <span class=\"o\">==<\/span> <span class=\"n\">comB<\/span><span class=\"o\">){<\/span>\r\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span>\r\n                    <span class=\"s\">\"\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfA:\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">strA<\/span>\r\n                    <span class=\"o\">);<\/span>\r\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span>\r\n                    <span class=\"s\">\"\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfB:\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">strB<\/span>\r\n                    <span class=\"o\">);<\/span>\r\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span>\r\n                    <span class=\"s\">\"\u3042\u3044\u3053\"<\/span>\r\n                    <span class=\"o\">);<\/span>\r\n        <span class=\"o\">}<\/span>\r\n        <span class=\"k\">else<\/span> <span class=\"nf\">if<\/span><span class=\"o\">(((<\/span><span class=\"n\">comA<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span><span class=\"o\">)<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"o\">(<\/span><span class=\"n\">comB<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">1<\/span><span class=\"o\">))<\/span> <span class=\"o\">||<\/span> <span class=\"o\">((<\/span><span class=\"n\">comA<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">1<\/span><span class=\"o\">)<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"o\">(<\/span><span class=\"n\">comB<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">2<\/span><span class=\"o\">))<\/span> <span class=\"o\">||<\/span> <span class=\"o\">((<\/span><span class=\"n\">comA<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">2<\/span><span class=\"o\">)<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"o\">(<\/span><span class=\"n\">comB<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span><span class=\"o\">))){<\/span>\r\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span>\r\n                    <span class=\"s\">\"\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfA:\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">strA<\/span>\r\n                    <span class=\"o\">);<\/span>\r\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span>\r\n                    <span class=\"s\">\"\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfB:\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">strB<\/span>\r\n                    <span class=\"o\">);<\/span>\r\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span>\r\n                    <span class=\"s\">\"\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfA\u306e\u52dd\u3061\"<\/span>\r\n                    <span class=\"o\">);<\/span>\r\n        <span class=\"o\">}<\/span>\r\n        <span class=\"k\">else<\/span><span class=\"o\">{<\/span>\r\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span>\r\n                    <span class=\"s\">\"\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfA:\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">strA<\/span>\r\n                    <span class=\"o\">);<\/span>\r\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span>\r\n                    <span class=\"s\">\"\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfB:\"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">strB<\/span>\r\n                    <span class=\"o\">);<\/span>\r\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span>\r\n                    <span class=\"s\">\"\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfA\u306e\u8ca0\u3051\"<\/span>\r\n                    <span class=\"o\">);<\/span>\r\n        <span class=\"o\">}<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"c\"># \u30b3\u30f3\u30d1\u30a4\u30eb<\/span>\r\njavac Janken.java\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"err\">$<\/span> <span class=\"n\">java<\/span> <span class=\"n\">Janken<\/span><span class=\"o\">.<\/span><span class=\"n\">java<\/span> \r\n<span class=\"n\">Exception<\/span> <span class=\"n\">in<\/span> <span class=\"n\">thread<\/span> <span class=\"s\">\"main\"<\/span> <span class=\"n\">java<\/span><span class=\"o\">.<\/span><span class=\"n\">lang<\/span><span class=\"o\">.<\/span><span class=\"n\">ArrayIndexOutOfBoundsException<\/span><span class=\"o\">:<\/span> <span class=\"n\">Index<\/span> <span class=\"m\">0<\/span> <span class=\"n\">out<\/span> <span class=\"n\">of<\/span> <span class=\"n\">bounds<\/span> <span class=\"k\">for<\/span> <span class=\"n\">length<\/span> <span class=\"m\">0<\/span>\r\n    <span class=\"n\">at<\/span> <span class=\"n\">Janken<\/span><span class=\"o\">.<\/span><span class=\"n\">main<\/span><span class=\"p\">(<\/span><span class=\"n\">Janken<\/span><span class=\"o\">.<\/span><span class=\"n\">java<\/span><span class=\"o\">:<\/span><span class=\"m\">7<\/span><span class=\"p\">)<\/span>\r\n\r\n<span class=\"err\">$<\/span> <span class=\"n\">java<\/span> <span class=\"n\">Janken<\/span><span class=\"o\">.<\/span><span class=\"n\">java<\/span> <span class=\"m\">0<\/span>\r\n<span class=\"n\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfA<\/span><span class=\"o\">:<\/span><span class=\"n\">\u30b0\u30fc<\/span>\r\n<span class=\"n\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfB<\/span><span class=\"o\">:<\/span><span class=\"n\">\u30c1\u30e7\u30ad<\/span>\r\n<span class=\"n\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfA\u306e\u52dd\u3061<\/span>\r\n\r\n<span class=\"err\">$<\/span> <span class=\"n\">java<\/span> <span class=\"n\">Janken<\/span><span class=\"o\">.<\/span><span class=\"n\">java<\/span> <span class=\"m\">1<\/span>\r\n<span class=\"n\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfA<\/span><span class=\"o\">:<\/span><span class=\"n\">\u30b0\u30fc<\/span>\r\n<span class=\"n\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfB<\/span><span class=\"o\">:<\/span><span class=\"n\">\u30c1\u30e7\u30ad<\/span>\r\n<span class=\"n\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfA\u306e\u52dd\u3061<\/span>\r\n\r\n<span class=\"err\">$<\/span> <span class=\"n\">java<\/span> <span class=\"n\">Janken<\/span><span class=\"o\">.<\/span><span class=\"n\">java<\/span> <span class=\"m\">2<\/span>\r\n<span class=\"n\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfA<\/span><span class=\"o\">:<\/span><span class=\"n\">\u30c1\u30e7\u30ad<\/span>\r\n<span class=\"n\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfB<\/span><span class=\"o\">:<\/span><span class=\"n\">\u30b0\u30fc<\/span>\r\n<span class=\"n\">\u30b3\u30f3\u30d4\u30e5\u30fc\u30bfA\u306e\u8ca0\u3051<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>[Q&amp;A] Java\u300c\u5909\u6570strA\u306f\u521d\u671f\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u300d\u30a8\u30e9\u30fc\u306e\u539f\u56e0 &#8211;  [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30957","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"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>\u5728Java\u4e2d\u73a9\u526a\u5200\u77f3\u5934\u5e03 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u5728Java\u4e2d\u73a9\u526a\u5200\u77f3\u5934\u5e03\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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