{"id":2488,"date":"2016-01-06T17:22:10","date_gmt":"2016-01-06T08:22:10","guid":{"rendered":"http:\/\/blog.rutake.com\/techmemo\/?p=2488"},"modified":"2016-01-06T17:23:27","modified_gmt":"2016-01-06T08:23:27","slug":"java-class%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%8c%e3%81%a9%e3%81%ae%e3%83%90%e3%83%bc%e3%82%b8%e3%83%a7%e3%83%b3%e3%81%a7%e3%82%b3%e3%83%b3%e3%83%91%e3%82%a4%e3%83%ab%e3%81%95%e3%82%8c%e3%81%9f","status":"publish","type":"post","link":"https:\/\/blog.rutake.com\/techmemo\/2016\/01\/06\/java-class%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%8c%e3%81%a9%e3%81%ae%e3%83%90%e3%83%bc%e3%82%b8%e3%83%a7%e3%83%b3%e3%81%a7%e3%82%b3%e3%83%b3%e3%83%91%e3%82%a4%e3%83%ab%e3%81%95%e3%82%8c%e3%81%9f\/","title":{"rendered":"Java class\u30d5\u30a1\u30a4\u30eb\u304c\u3069\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u305f\u306e\u304b\u3092\u8abf\u3079\u308b"},"content":{"rendered":"<p>\u3082\u3046Java8\u304c\u51fa\u3066\u304b\u3089\u304b\u306a\u308a\u305f\u3064\u306e\u306b\u3001\u65e2\u5b58\u3067\u52d5\u3044\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u306f\u3059\u3050\u306b\u306f\u6700\u65b0\u30d0\u30fc\u30b8\u30e7\u30f3\u3067\u306f\u52d5\u304b\u305b\u306a\u3044\u60b2\u3057\u3055\u3002<\/p>\n<p>\u3057\u304b\u3057\u4e2d\u306b\u306f\u5bb9\u8d66\u306a\u304fJDK8\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u3066\u3044\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3082\u3042\u308a\u3001\u305d\u306e\u3088\u3046\u306a\u30af\u30e9\u30b9\u3092\u5bfe\u8c61\u30d0\u30fc\u30b8\u30e7\u30f3\u4ee5\u4e0b\u306eJDK\u3067\u52d5\u304b\u3057\u305f\u5834\u5408\u306b\u306f\u3001\u300c<a href=\"http:\/\/blog.rutake.com\/techmemo\/2009\/01\/27\/unsupportedclassversionerror%e5%af%be%e5%87%a6%e6%b3%95%e3%81%9d%e3%81%ae%ef%bc%92\/\">java.lang.UnsupportedClassVersionError<\/a>:\u300d\u304c\u51fa\u3066\u3057\u307e\u3046\u3002<\/p>\n<p>\u672a\u7136\u306b\u9632\u3050\u305f\u3081\u306bjar\u306e\u4e2d\u8eab\u306e\u30af\u30e9\u30b9\u30d5\u30a1\u30a4\u30eb\u3092\u30c1\u30a7\u30c3\u30af\u3057\u3066\u307f\u308b\u3079\u3057\u3002<\/p>\n<p>[shell]<br \/>\njar xvf xxx.jar<br \/>\njavap -v xxx.class<\/p>\n<p>#\u51fa\u529b\u7d50\u679c\u629c\u7c8b<br \/>\n  minor version: 0<br \/>\n  major version: 48<br \/>\n[\/shell]<\/p>\n<p>majar version\u306b\u6ce8\u76ee\uff01\u3053\u308c\u304c48\u3067\u3042\u308c\u3070\u3001JDK1.4\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u305f\u3068\u3044\u3046\u3053\u3068\u3067\u3042\u308b\uff01<br \/>\n\u3057\u304b\u3057\u3053\u306emajar\u30d0\u30fc\u30b8\u30e7\u30f3\u3068JDK\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u4e0d\u4e00\u81f4\u306b\u3082\u56f0\u3063\u305f\u3082\u3093\u3060\u306a\u3002<\/p>\n<p>JDK1.2\u304c46\u3067\u305d\u3053\u304b\u30890.1\u305a\u3064\u4e0a\u304c\u308b\u305f\u3073\u306b1\u305a\u3064\u5897\u3048\u3066\u30011.6\u3067\u306f50\u3068\u306a\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3082\u3046Java8\u304c\u51fa\u3066\u304b\u3089\u304b\u306a\u308a\u305f\u3064\u306e\u306b\u3001\u65e2\u5b58\u3067\u52d5\u3044\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u306f\u3059\u3050\u306b\u306f\u6700\u65b0\u30d0 &hellip; <a href=\"https:\/\/blog.rutake.com\/techmemo\/2016\/01\/06\/java-class%e3%83%95%e3%82%a1%e3%82%a4%e3%83%ab%e3%81%8c%e3%81%a9%e3%81%ae%e3%83%90%e3%83%bc%e3%82%b8%e3%83%a7%e3%83%b3%e3%81%a7%e3%82%b3%e3%83%b3%e3%83%91%e3%82%a4%e3%83%ab%e3%81%95%e3%82%8c%e3%81%9f\/\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[],"_links":{"self":[{"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/posts\/2488"}],"collection":[{"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/comments?post=2488"}],"version-history":[{"count":3,"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/posts\/2488\/revisions"}],"predecessor-version":[{"id":2491,"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/posts\/2488\/revisions\/2491"}],"wp:attachment":[{"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/media?parent=2488"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/categories?post=2488"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.rutake.com\/techmemo\/wp-json\/wp\/v2\/tags?post=2488"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}