{"id":10025,"date":"2023-11-28T21:24:44","date_gmt":"2023-11-28T13:24:44","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10025"},"modified":"2023-12-07T10:43:10","modified_gmt":"2023-12-07T02:43:10","slug":"jvm-zhong-lei-wen-jian-jie-gou-zhi-dao-ma","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-zhong-lei-wen-jian-jie-gou-zhi-dao-ma\/","title":{"rendered":"JVM\u4e2d\u7c7b\u6587\u4ef6\u7ed3\u6784\u77e5\u9053\u5417\uff1f"},"content":{"rendered":"<p>\u662f\u7684\uff0cJava\u7c7b\u6587\u4ef6\u662fJava\u6e90\u4ee3\u7801\u7f16\u8bd1\u540e\u751f\u6210\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u5b83\u5305\u542b\u4e86\u7f16\u8bd1\u540e\u7684Java\u7a0b\u5e8f\u7684\u5b57\u8282\u7801\uff0c\u4ee5\u53ca\u4e00\u4e9b\u989d\u5916\u7684\u5143\u6570\u636e\u4fe1\u606f\u3002Java\u7c7b\u6587\u4ef6\u7684\u7ed3\u6784\u662f\u6309\u7167Java\u865a\u62df\u673a\u89c4\u8303\u5b9a\u4e49\u7684\uff0c\u4ee5\u4e0b\u662fJava\u7c7b\u6587\u4ef6\u7684\u57fa\u672c\u7ed3\u6784\uff1a<\/p>\n<h3><a id=\"java%E7%B1%BB%E6%96%87%E4%BB%B6%E5%9F%BA%E6%9C%AC%E7%BB%93%E6%9E%84%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>Java\u7c7b\u6587\u4ef6\u57fa\u672c\u7ed3\u6784\uff1a<\/h3>\n<ol>\n<li>\n<strong>\u9b54\u6570\uff08Magic Number\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u56fa\u5b9a\u76844\u5b57\u8282\uff0c\u7528\u4e8e\u6807\u8bc6\u6587\u4ef6\u662f\u5426\u4e3aJava\u7c7b\u6587\u4ef6\u3002\u901a\u5e38\u4e3a<code>0xCAFEBABE<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u7248\u672c\u4fe1\u606f\uff1a<\/strong><\/p>\n<ul>\n<li>Java\u7c7b\u6587\u4ef6\u7684\u6b21\u7248\u672c\u53f7\u548c\u4e3b\u7248\u672c\u53f7\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u5e38\u91cf\u6c60\uff08Constant Pool\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u5360\u7528\u4e24\u4e2a\u5b57\u8282\u7684\u65e0\u7b26\u53f7\u6570\u8868\u793a\u5e38\u91cf\u6c60\u4e2d\u5e38\u91cf\u7684\u6570\u91cf\uff08\u4e0d\u5305\u62ec\u5360\u4e24\u4e2a\u4f4d\u7f6e\u7684\u5e38\u91cf\u6c60\u8ba1\u6570\u5668\u672c\u8eab\uff09\u3002<\/li>\n<li>\u5e38\u91cf\u6c60\u4e2d\u5b58\u50a8\u4e86\u5404\u79cd\u5b57\u9762\u91cf\u548c\u7b26\u53f7\u5f15\u7528\uff0c\u5305\u62ec\u7c7b\u548c\u63a5\u53e3\u7684\u5168\u9650\u5b9a\u540d\u3001\u5b57\u6bb5\u548c\u65b9\u6cd5\u7684\u540d\u79f0\u548c\u63cf\u8ff0\u7b26\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u8bbf\u95ee\u6807\u5fd7\uff08Access Flags\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u7528\u4e8e\u6807\u8bc6\u7c7b\u6216\u63a5\u53e3\u7684\u8bbf\u95ee\u6743\u9650\u548c\u5c5e\u6027\uff0c\u4f8b\u5982<code>public<\/code>\u3001<code>final<\/code>\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u7c7b\u7d22\u5f15\u3001\u7236\u7c7b\u7d22\u5f15\u3001\u63a5\u53e3\u7d22\u5f15\u96c6\u5408\uff1a<\/strong><\/p>\n<ul>\n<li>\u7c7b\u7d22\u5f15\u6307\u5411\u5e38\u91cf\u6c60\u4e2d\u8868\u793a\u5f53\u524d\u7c7b\u7684\u5168\u9650\u5b9a\u540d\u7684\u5e38\u91cf\u3002<\/li>\n<li>\u7236\u7c7b\u7d22\u5f15\u6307\u5411\u5e38\u91cf\u6c60\u4e2d\u8868\u793a\u5f53\u524d\u7c7b\u7684\u7236\u7c7b\u7684\u5168\u9650\u5b9a\u540d\u7684\u5e38\u91cf\u3002<\/li>\n<li>\u63a5\u53e3\u7d22\u5f15\u96c6\u5408\u5305\u542b\u4e86\u5e38\u91cf\u6c60\u4e2d\u8868\u793a\u5f53\u524d\u7c7b\u5b9e\u73b0\u7684\u63a5\u53e3\u7684\u5168\u9650\u5b9a\u540d\u7684\u5e38\u91cf\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u5b57\u6bb5\u8868\uff08Field Table\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u63cf\u8ff0\u7c7b\u6216\u63a5\u53e3\u4e2d\u58f0\u660e\u7684\u53d8\u91cf\uff0c\u5305\u62ec\u5b57\u6bb5\u540d\u3001\u5b57\u6bb5\u7c7b\u578b\u3001\u8bbf\u95ee\u6807\u5fd7\u7b49\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u65b9\u6cd5\u8868\uff08Method Table\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u63cf\u8ff0\u7c7b\u6216\u63a5\u53e3\u4e2d\u58f0\u660e\u7684\u65b9\u6cd5\uff0c\u5305\u62ec\u65b9\u6cd5\u540d\u3001\u65b9\u6cd5\u8fd4\u56de\u7c7b\u578b\u3001\u65b9\u6cd5\u53c2\u6570\u5217\u8868\u3001\u8bbf\u95ee\u6807\u5fd7\u7b49\u4fe1\u606f\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u5c5e\u6027\u8868\uff08Attribute Table\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u5305\u542b\u5404\u79cd\u9644\u52a0\u4fe1\u606f\uff0c\u4f8b\u5982\u4ee3\u7801\uff08\u65b9\u6cd5\u4f53\uff09\u5c5e\u6027\u3001\u884c\u53f7\u8868\u3001\u5c40\u90e8\u53d8\u91cf\u8868\u7b49\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<h3><a id=\"%E7%B1%BB%E6%96%87%E4%BB%B6%E7%BB%93%E6%9E%84%E7%9A%84%E6%80%BB%E4%BD%93%E7%A4%BA%E6%84%8F%E5%9B%BE%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a>\u7c7b\u6587\u4ef6\u7ed3\u6784\u7684\u603b\u4f53\u793a\u610f\u56fe\uff1a<\/h3>\n<pre><code class=\"language-plain_text\">+----------------+\n|   Magic Number |\n+----------------+\n|  Version Info  |\n+----------------+\n| Constant Pool  |\n+----------------+\n| Access Flags   |\n+----------------+\n|   Class Index  |\n+----------------+\n|  Superclass Index  |\n+----------------+\n| Interface Indexes |\n+----------------+\n|   Field Table  |\n+----------------+\n|   Method Table |\n+----------------+\n| Attribute Table |\n+----------------+\n<\/code><\/pre>\n<p>\u8fd9\u662f\u4e00\u4e2a\u7b80\u5316\u7684\u8868\u793a\uff0c\u5b9e\u9645\u4e0a\uff0cJava\u7c7b\u6587\u4ef6\u7684\u7ed3\u6784\u8fd8\u5305\u62ec\u4e00\u4e9b\u5176\u4ed6\u7684\u4fe1\u606f\u548c\u8868\uff0c\u5177\u4f53\u7684\u7ec6\u8282\u53ef\u4ee5\u53c2\u8003Java\u865a\u62df\u673a\u89c4\u8303\u3002\u7c7b\u6587\u4ef6\u7ed3\u6784\u7684\u5b9a\u4e49\u4f7f\u5f97Java\u6e90\u4ee3\u7801\u548cJava\u865a\u62df\u673a\u4e4b\u95f4\u6709\u4e00\u4e2a\u6e05\u6670\u7684\u6865\u6881\uff0cJava\u865a\u62df\u673a\u53ef\u4ee5\u6839\u636e\u7c7b\u6587\u4ef6\u7684\u7ed3\u6784\u6765\u6267\u884cJava\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u662f\u7684\uff0cJava\u7c7b\u6587\u4ef6\u662fJava\u6e90\u4ee3\u7801\u7f16\u8bd1\u540e\u751f\u6210\u7684\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u5b83\u5305\u542b\u4e86\u7f16\u8bd1\u540e\u7684Java\u7a0b\u5e8f\u7684\u5b57\u8282\u7801\uff0c\u4ee5\u53ca\u4e00\u4e9b\u989d\u5916 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[119],"tags":[],"class_list":["post-10025","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10025","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\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=10025"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10025\/revisions"}],"predecessor-version":[{"id":16788,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10025\/revisions\/16788"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10025"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10025"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10025"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}