volatile \u53d8\u91cf\u7684\u4e24\u79cd\u7279\u6027\uff1a
\n\u53d8\u91cf\u53ef\u89c1\u6027
\n\u4fdd\u8bc1\u8be5\u53d8\u91cf\u5bf9\u6240\u6709\u7ebf\u7a0b\u53ef\u89c1\uff0c\u8fd9\u91cc\u7684\u53ef\u89c1\u6027\u6307\u7684\u662f\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u4fee\u6539\u4e86\u53d8\u91cf\u7684\u503c,\u90a3\u4e48\u65b0\u7684\u503c\u5bf9\u4e8e\u5176\u4ed6\u7ebf\u7a0b\u662f\u53ef\u4ee5\u7acb\u5373\u83b7\u53d6\u7684\u3002
\n\u7981\u6b62\u91cd\u6392\u5e8f
\nvolatile \u7981\u6b62\u4e86\u6307\u4ee4\u91cd\u6392\u3002\u6bd4 sychronized \u66f4\u8f7b\u91cf\u7ea7\u7684\u540c\u6b65\u9501\u3002\u5728\u8bbf\u95eevolatile \u53d8\u91cf\u65f6\u4e0d\u4f1a\u6267\u884c\u52a0\u9501\u64cd\u4f5c\uff0c\u56e0\u6b64\u4e5f\u5c31\u4e0d\u4f1a\u4f7f\u6267\u884c\u7ebf\u7a0b\u963b\u585e\uff0c\u56e0\u6b64volatile \u53d8\u91cf\u662f\u4e00\u79cd\u6bd4 sychronized \u5173\u952e\u5b57\u66f4\u8f7b\u91cf\u7ea7\u7684\u540c\u6b65\u673a\u5236\u3002
\nvolatile \u9002\u5408\u8fd9\u79cd\u573a\u666f:\u4e00\u4e2a\u53d8\u91cf\u88ab\u591a\u4e2a\u7ebf\u7a0b\u5171\u4eab,\u7ebf\u7a0b\u76f4\u63a5\u7ed9\u8fd9\u4e2a\u53d8\u91cf\u8d4b\u503c\u3002
\n\u5f53\u5bf9\u975e volatile \u53d8\u91cf\u8fdb\u884c\u8bfb\u5199\u7684\u65f6\u5019\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u5148\u4ece\u5185\u5b58\u62f7\u8d1d\u53d8\u91cf\u5230 CPU \u7f13\u5b58\u4e2d\u3002\u5982\u679c\u8ba1\u7b97\u673a\u6709\u591a\u4e2a CPU\uff0c\u6bcf\u4e2a\u7ebf\u7a0b\u53ef\u80fd\u5728\u4e0d\u540c\u7684 CPU \u4e0a\u88ab\u5904\u7406\uff0c\u8fd9\u610f\u5473\u7740\u6bcf\u4e2a\u7ebf\u7a0b\u53ef\u4ee5\u62f7\u8d1d\u5230\u4e0d\u540c CPU cache \u4e2d\u3002\u800c\u58f0\u660e\u53d8\u91cf\u662f volatile \u7684\uff0cJVM \u4fdd\u8bc1\u4e86\u6bcf\u6b21\u8bfb\u53d8\u91cf\u90fd\u4ece\u5185\u5b58\u4e2d\u8bfb\uff0c\u8df3\u8fc7 CPU cache \u8fd9\u4e00\u6b65\u3002
\n\u503c\u5f97\u8bf4\u660e\u7684\u662f\u5bf9 volatile \u53d8\u91cf\u7684\u5355\u6b21\u8bfb\/\u5199\u64cd\u4f5c\u53ef\u4ee5\u4fdd\u8bc1\u539f\u5b50\u6027\u7684\uff0c\u5982long\u548cdouble \u7c7b\u578b\u53d8\u91cf\uff0c\u4f46\u662f\u5e76\u4e0d\u80fd\u4fdd\u8bc1i \u8fd9\u79cd\u64cd\u4f5c\u7684\u539f\u5b50\u6027\uff0c\u56e0\u4e3a\u672c\u8d28\u4e0ai\u662f\u8bfb\u3001\u5199\u4e24\u6b21\u64cd\u4f5c\u3002\u5728\u67d0\u4e9b\u573a\u666f\u4e0b\u53ef\u4ee5\u4ee3\u66ff Synchronized\u3002\u4f46\u662f\uff0cvolatile \u4e0d\u80fd\u5b8c\u5168\u53d6\u4ee3 Synchronized \u7684\u4f4d\u7f6e\uff0c\u53ea\u6709\u5728\u4e00\u4e9b\u7279\u6b8a\u7684\u573a\u666f\u4e0b\uff0c\u624d\u80fd\u9002\u7528volatile.
\n\u603b\u4f53\u6765\u8bf4\uff0c\u9700\u8981\u5fc5\u987b\u540c\u65f6\u6ee1\u8db3\u4e0b\u9762\u4e24\u4e2a\u6761\u4ef6\u65f6\u624d\u80fd\u4fdd\u8bc1\u5e76\u53d1\u73af\u5883\u7684\u7ebf\u7a0b\u5b89\u5168\uff1a
\n1\u3001\u5bf9\u53d8\u91cf\u7684\u5199\u64cd\u4f5c\u4e0d\u4f9d\u8d56\u4e8e\u5f53\u524d\u503c\uff08\u6bd4\u5982 i++\uff09\uff0c\u6216\u8005\u8bf4\u662f\u5355\u7eaf\u7684\u53d8\u91cf\u8d4b\u503c(boolean flag = true)\u3002
\n2\u3001\u8be5\u53d8\u91cf\u6ca1\u6709\u5305\u542b\u5728\u5177\u6709\u5176\u4ed6\u53d8\u91cf\u7684\u4e0d\u53d8\u5f0f\u4e2d\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u4e0d\u540c\u7684 volatile\u53d8\u91cf\u4e4b\u95f4\uff0c\u4e0d\u80fd\u4e92\u76f8\u4f9d\u8d56\u3002\u53ea\u6709\u5728\u72b6\u6001\u771f\u6b63\u72ec\u7acb\u4e8e\u7a0b\u5e8f\u5185\u5176\u4ed6\u5185\u5bb9\u65f6\u624d\u80fd\u4f7f\u7528 volatile\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
volatile \u53d8\u91cf\u7684\u4e24\u79cd\u7279\u6027\uff1a \u53d8\u91cf\u53ef\u89c1\u6027 \u4fdd\u8bc1\u8be5\u53d8\u91cf\u5bf9\u6240\u6709\u7ebf\u7a0b\u53ef\u89c1\uff0c\u8fd9\u91cc\u7684\u53ef\u89c1\u6027\u6307\u7684\u662f\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u4fee\u6539\u4e86\u53d8 […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[99],"tags":[],"class_list":["post-10485","post","type-post","status-publish","format-standard","hentry","category-javabase"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10485","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=10485"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10485\/revisions"}],"predecessor-version":[{"id":10486,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10485\/revisions\/10486"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10485"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10485"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10485"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}