{"id":67014,"date":"2025-05-03T15:55:37","date_gmt":"2025-05-03T07:55:37","guid":{"rendered":"https:\/\/fwq.ai\/blog\/67014\/"},"modified":"2025-05-03T15:55:37","modified_gmt":"2025-05-03T07:55:37","slug":"java%e6%80%8e%e4%b9%88%e8%bf%94%e5%9b%9e%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%95%b0%e7%bb%84%e7%9a%84%e9%95%bf%e5%ba%a6%e9%99%90%e5%88%b6-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/67014\/","title":{"rendered":"java\u600e\u4e48\u8fd4\u56de\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u957f\u5ea6\u9650\u5236"},"content":{"rendered":"<blockquote><p>\n  java \u4e2d\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u957f\u5ea6\u9650\u5236\u53d7\u4ee5\u4e0b\u56e0\u7d20\u5f71\u54cd\uff1a\u5185\u5b58\u5927\u5c0f\uff1a\u9ed8\u8ba4\u5806\u5927\u5c0f\u4e3a 256mb\uff0c\u4f46\u53ef\u901a\u8fc7\u547d\u4ee4\u884c\u6307\u5b9a\u3002\u6574\u6570\u7c7b\u578b\uff1a\u6570\u7ec4\u957f\u5ea6\u7531 int \u7c7b\u578b\u8868\u793a\uff0c\u5728 32 \u4f4d jvm \u4e2d\u6700\u5927\u503c\u4e3a 2^31 &#8211; 1\uff0c\u5728 64 \u4f4d jvm \u4e2d\u6700\u5927\u503c\u4e3a 2^63 &#8211; 1\u3002\u6570\u636e\u7c7b\u578b\uff1a\u5b57\u7b26\u4e32\u5728 java \u4e2d\u8868\u793a\u4e3a char[] \u6570\u7ec4\uff0c\u56e0\u6b64\u5b9e\u9645\u9650\u5236\u53d6\u51b3\u4e8e\u5355\u4e2a char \u53d8\u91cf\u53ef\u5b58\u50a8\u7684\u5b57\u7b26\u6570\u3002\u8003\u8651\u4ee5\u4e0a\u56e0\u7d20\u540e\uff0c\u5728 32 \u4f4d jvm \u4e2d\uff0c\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u6700\u5927\u957f\u5ea6\u7ea6\u4e3a 2,147,483,647 \u4e2a\u5b57\u7b26\uff0c\u800c\u5728 64 \u4f4d jvm\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202411\/18\/2024111800032012485.jpg\" class=\"aligncenter\" title=\"java\u600e\u4e48\u8fd4\u56de\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u957f\u5ea6\u9650\u5236\u63d2\u56fe\" alt=\"java\u600e\u4e48\u8fd4\u56de\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u957f\u5ea6\u9650\u5236\u63d2\u56fe\" \/><\/p>\n<p><strong>Java \u4e2d\u8fd4\u56de\u957f\u5ea6\u7684\u9650\u5236<\/strong><\/p>\n<p>\u5728 Java \u4e2d\uff0c\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u957f\u5ea6\u9650\u5236\u53d6\u51b3\u4e8e\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n<p><strong>1. \u5185\u5b58\u5927\u5c0f<\/strong><\/p>\n<p>Java \u5806\u5927\u5c0f\u9650\u5236\u4e86\u53ef\u4ee5\u521b\u5efa\u7684\u6570\u7ec4\u5927\u5c0f\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5806\u5927\u5c0f\u4e3a 256MB\uff0c\u4f46\u8fd9\u53ef\u4ee5\u901a\u8fc7 -Xmx \u53c2\u6570\u5728\u547d\u4ee4\u884c\u4e2d\u6307\u5b9a\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p><strong>2. \u6574\u6570\u7c7b\u578b<\/strong><\/p>\n<p>\u6570\u7ec4\u957f\u5ea6\u7531 int \u7c7b\u578b\u8868\u793a\uff0c\u8be5\u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u7684\u6700\u5927\u503c\u53d6\u51b3\u4e8e JVM \u7684\u4f4d\u6570\uff1a<\/p>\n<ul>\n<li>\u5728 32 \u4f4d JVM \u4e2d\uff0cint \u7c7b\u578b\u7684\u6700\u5927\u503c\u4e3a 2^31 &#8211; 1<\/li>\n<li>\u5728 64 \u4f4d JVM \u4e2d\uff0cint \u7c7b\u578b\u7684\u6700\u5927\u503c\u4e3a 2^63 &#8211; 1<\/li>\n<\/ul>\n<p><strong>3. \u6570\u636e\u7c7b\u578b<\/strong><\/p>\n<p>\u5b57\u7b26\u4e32\u5728 Java \u4e2d\u8868\u793a\u4e3a char[] \u6570\u7ec4\u3002\u8fd9\u610f\u5473\u7740\u5b9e\u9645\u9650\u5236\u53d6\u51b3\u4e8e\u53ef\u80fd\u5b58\u50a8\u5728\u5355\u4e2a char \u53d8\u91cf\u4e2d\u7684\u5b57\u7b26\u6570\u3002<\/p>\n<p><strong>\u5b9e\u9645\u9650\u5236<\/strong><\/p>\n<p>\u8003\u8651\u4e0a\u8ff0\u56e0\u7d20\u540e\uff0cJava \u4e2d\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u5b9e\u9645\u957f\u5ea6\u9650\u5236\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u5728 32 \u4f4d JVM \u4e2d\uff0c\u6700\u5927\u957f\u5ea6\u7ea6\u4e3a 2,147,483,647 \u4e2a\u5b57\u7b26<\/li>\n<li>\u5728 64 \u4f4d JVM \u4e2d\uff0c\u6700\u5927\u957f\u5ea6\u7ea6\u4e3a 9,223,372,036,854,775,807 \u4e2a\u5b57\u7b26<\/li>\n<\/ul>\n<p><strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n<p>\u8fd9\u4e9b\u9650\u5236\u662f\u7406\u8bba\u4e0a\u7684\uff0c\u5b9e\u9645\u9650\u5236\u53ef\u80fd\u56e0 JVM \u5b9e\u73b0\u548c\u7cfb\u7edf\u8d44\u6e90\u800c\u5f02\u3002\u5efa\u8bae\u4f7f\u7528\u8f83\u5c0f\u7684\u6570\u7ec4\uff0c\u56e0\u4e3a\u5927\u6570\u7ec4\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fjava\u600e\u4e48\u8fd4\u56de\u7684\u957f\u5ea6\u9650\u5236\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8IDCBABY\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>java \u4e2d\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u957f\u5ea6\u9650\u5236\u53d7\u4ee5\u4e0b\u56e0\u7d20\u5f71\u54cd\uff1a\u5185\u5b58\u5927\u5c0f\uff1a\u9ed8\u8ba4\u5806\u5927\u5c0f\u4e3a 256mb\uff0c\u4f46\u53ef\u901a\u8fc7\u547d\u4ee4\u884c\u6307\u5b9a\u3002\u6574\u6570\u7c7b\u578b\uff1a\u6570\u7ec4\u957f\u5ea6\u7531 int \u7c7b\u578b\u8868\u793a\uff0c\u5728 32 \u4f4d jvm \u4e2d\u6700\u5927\u503c\u4e3a 2^31 &#8211; 1\uff0c\u5728 64 \u4f4d jvm \u4e2d\u6700\u5927\u503c\u4e3a 2^63 &#8211; 1\u3002\u6570\u636e\u7c7b\u578b\uff1a\u5b57\u7b26\u4e32\u5728 java \u4e2d\u8868\u793a\u4e3a char[] \u6570\u7ec4\uff0c\u56e0\u6b64\u5b9e\u9645\u9650\u5236\u53d6\u51b3\u4e8e\u5355\u4e2a char \u53d8\u91cf\u53ef\u5b58\u50a8\u7684\u5b57\u7b26\u6570\u3002\u8003\u8651\u4ee5\u4e0a\u56e0\u7d20\u540e\uff0c\u5728 32 \u4f4d jvm \u4e2d\uff0c\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u6700\u5927\u957f\u5ea6\u7ea6\u4e3a 2,147,483,647 \u4e2a\u5b57\u7b26\uff0c\u800c\u5728 64 \u4f4d jvm Java \u4e2d\u8fd4\u56de\u957f\u5ea6\u7684\u9650\u5236 \u5728 Java \u4e2d\uff0c\u5b57\u7b26\u4e32\u6570\u7ec4\u7684\u957f\u5ea6\u9650\u5236\u53d6\u51b3\u4e8e\u4ee5\u4e0b\u56e0\u7d20\uff1a 1. \u5185\u5b58\u5927\u5c0f Java \u5806\u5927\u5c0f\u9650\u5236\u4e86\u53ef\u4ee5\u521b\u5efa\u7684\u6570\u7ec4\u5927\u5c0f\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5806\u5927\u5c0f\u4e3a 256MB\uff0c\u4f46\u8fd9\u53ef\u4ee5\u901a\u8fc7 -Xmx \u53c2\u6570\u5728\u547d\u4ee4\u884c\u4e2d\u6307\u5b9a\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b 2. \u6574\u6570\u7c7b\u578b \u6570\u7ec4\u957f\u5ea6\u7531 int \u7c7b\u578b\u8868\u793a\uff0c\u8be5\u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u7684\u6700\u5927\u503c\u53d6\u51b3\u4e8e JVM \u7684\u4f4d\u6570\uff1a \u5728 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-67014","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/67014","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=67014"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/67014\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=67014"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=67014"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=67014"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}