{"id":5526,"date":"2026-01-23T13:09:54","date_gmt":"2026-01-23T05:09:54","guid":{"rendered":"https:\/\/www.xttblog.com\/?p=5526"},"modified":"2026-01-23T13:09:54","modified_gmt":"2026-01-23T05:09:54","slug":"java-%e7%9a%84-valhalla-%e9%a1%b9%e7%9b%ae%e7%bb%88%e4%ba%8e%e5%af%b9-null-%e5%8a%a8%e6%89%8b%e4%ba%86%ef%bc%8cjep-8303099-%e5%b0%86%e7%bb%88%e7%bb%93-npe-%e7%a9%ba%e6%8c%87%e9%92%88%e5%bc%82%e5%b8%b8","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=5526","title":{"rendered":"Java \u7684 Valhalla \u9879\u76ee\u7ec8\u4e8e\u5bf9 null \u52a8\u624b\u4e86\uff0cJEP 8303099 \u5c06\u7ec8\u7ed3 NPE \u7a7a\u6307\u9488\u5f02\u5e38"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Java \u7684 Valhalla \u9879\u76ee\u7ec8\u4e8e\u5bf9 null \u52a8\u624b\u4e86\uff0cJEP 8303099 \u5c06\u7ec8\u7ed3 NPE \u7a7a\u6307\u9488\u5f02\u5e38\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Java \u7a0b\u5e8f\u5458\u82e6 null \u7a7a\u5f02\u5e38\u4e45\u77e3\uff0c\u5c24\u5176\u662f\u521d\u5b66\u8005\uff0c\u7ecf\u5e38\u4f1a\u9677\u5165\u5230\u7a7a\u5f02\u5e38\u91cc\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u636e\u7edf\u8ba1\uff0c80% \u4ee5\u4e0a\u7684\u751f\u4ea7\u95ee\u9898\uff0c\u90fd\u662f\u6709 null \u8fd9\u7c7b NPE \u7a7a\u6307\u9488\u5f02\u5e38\u9020\u6210\u7684\u3002\u4e0d\u6b62 Java \u8bed\u8a00\u6709\u8fd9\u65b9\u9762\u7684\u75bc\u82e6\uff0c\u5176\u5b83\u8bed\u8a00\u4e5f\u5b58\u5728\u7a7a\u6307\u9488\u95ee\u9898\u3002Java \u56e2\u961f\u5728\u542c\u53d6\u793e\u533a\u5410\u69fd\u540e\uff0c\u63a8\u51fa\u4e86 Optional\uff0c\u800c\u8fd9\u4e2a\u7528\u6cd5\u906d\u540c\u6837\u4e5f\u53d7\u5230\u4e86\u5927\u91cf\u7528\u6237\u201c\u9e21\u808b\u201d\u6807\u7b7e\u7684\u5410\u69fd\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u6b64\uff0c\u6211\u4e5f\u5199\u4e86\u4e0d\u5c11\u4e0e\u6b64\u76f8\u5173\u7684\u6587\u7ae0\uff0c\u5305\u62ec\u300a<a href=\"https:\/\/mp.weixin.qq.com\/s\/Ard-MCSFITVcvyL71XQchQ\">https:\/\/mp.weixin.qq.com\/s\/Ard-MCSFITVcvyL71XQchQ<\/a>\u300b\u3001\u300a<a href=\"https:\/\/mp.weixin.qq.com\/s\/OX5VY70-pmra6XT0wa-27g\">https:\/\/mp.weixin.qq.com\/s\/OX5VY70-pmra6XT0wa-27g<\/a>\u300b\u3001\u300a<a href=\"https:\/\/mp.weixin.qq.com\/s\/gdvGqd0NSae9Y1vne99uVQ\">https:\/\/mp.weixin.qq.com\/s\/gdvGqd0NSae9Y1vne99uVQ<\/a>\u300b\u7b49\u3002\u751a\u81f3\u662f Spring \u7b49\u6846\u67b6\u4e5f\u5728\u63a8\u8fdb\u9884\u9632\u76f8\u5173\u7a7a\u5f02\u5e38\u300a<a href=\"https:\/\/mp.weixin.qq.com\/s\/8KDYRmu1j8wMV0PmBd_Ong\">https:\/\/mp.weixin.qq.com\/s\/8KDYRmu1j8wMV0PmBd_Ong<\/a>\u300b\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5de7\u7684\u662f\uff0c\u6211\u6700\u8fd1\u5728\u793e\u533a\u91cc\u770b\u5230\u53c8\u6709\u4eba\u5728\u8ba8\u8bba<code>#\u4e1a\u4f59\u8349 JEP 8303099<\/code>\u8fd9\u4e2a\u63d0\u6848\u3002Java \u7684\u8fd9\u4e2a\u8349\u6848\u6b63\u5728\u901a\u8fc7 Project Valhalla \u5f15\u5165\u4e00\u79cd\u5168\u65b0\u7684\u8bed\u8a00\u7279\u6027<code>\u4e0d\u53ef\u7a7a\u7c7b\u578b\uff08Null-Restricted Types\uff09<\/code>\uff0c\u4ee5\u4ece\u6839\u672c\u4e0a\u89e3\u51b3\u56f0\u6270\u5f00\u53d1\u8005\u6570\u5341\u5e74\u7684<code>#NullPointerException<\/code>\u95ee\u9898\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\uff0c\u63a5\u4e0b\u6765\uff0c\u6211\u5c06\u6df1\u5165\u89e3\u8bfb JEP 8303099 \u7684\u8bbe\u8ba1\u52a8\u673a\u3001\u8bed\u6cd5\u5f62\u5f0f\u3001\u8fd0\u884c\u65f6\u884c\u4e3a\u53ca\u5176\u4e0e\u503c\u7c7b\u578b\uff08Value Types\uff09\u7684\u6df1\u5ea6\u534f\u540c\uff0c\u5927\u5bb6\u4e00\u8d77\u6765\u7406\u89e3\u8fd9\u4e00\u91cd\u5927\u53d8\u9769\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48 Java \u9700\u8981\u4e0d\u53ef\u7a7a\u7c7b\u578b\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Tony Hoare \u66fe\u5c06 <code>null<\/code> \u79f0\u4e3a\u201c\u5341\u4ebf\u7f8e\u5143\u9519\u8bef\u201d\uff08Billion-Dollar Mistake\uff09\u3002\u8981\u77e5\u9053\u5728 Java \u4e2d\uff0c\u4efb\u4f55\u5f15\u7528\u7c7b\u578b\u53d8\u91cf\u90fd\u53ef\u80fd\u4e3a<code>null<\/code>\uff0c\u800c\u8fd9\u79cd\u4e0d\u786e\u5b9a\u6027\u662f\u65e0\u6570\u8fd0\u884c\u65f6\u5f02\u5e38\u548c\u903b\u8f91 bug \u7684\u6839\u6e90\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c3d\u7ba1\u793e\u533a\u5df2\u6709\u591a\u79cd\u65b9\u6848\uff0c\u5982<code>@NonNull<\/code>\u6ce8\u89e3\u3001Checker Framework\u3001JSpecify \u7b49\uff0c\u4f46\u5b83\u4eec\u90fd\u53ea\u662f<code>\u7f16\u8bd1\u671f\u8f85\u52a9\u5de5\u5177<\/code>\uff0c\u65e0\u6cd5\u5728\u8bed\u8a00\u5c42\u9762\u63d0\u4f9b\u5f3a\u4fdd\u8bc1\uff0c\u4e5f\u65e0\u6cd5\u5f71\u54cd\u8fd0\u884c\u65f6\u884c\u4e3a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Project Valhalla \u7684\u76ee\u6807\u4e0d\u4ec5\u662f\u63d0\u5347\u6027\u80fd\uff08\u901a\u8fc7\u503c\u7c7b\u578b\u548c\u539f\u8bed\u7279\u5316\uff09\uff0c\u66f4\u662f\u8981<code>\u91cd\u5851 Java \u7684\u7c7b\u578b\u7cfb\u7edf<\/code>\u3002\u800c\u4e0d\u53ef\u7a7a\u7c7b\u578b\uff0c\u6b63\u662f\u5176\u4e2d\u5173\u952e\u4e00\u73af\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b83\u6216\u8bb8\u80fd\u8ba9 Java \u5f7b\u5e95\u544a\u522b\u201c10 \u4ebf\u7f8e\u5143\u9519\u8bef\u201d\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4ec0\u4e48\u662f\u4e0d\u53ef\u7a7a\u7c7b\u578b\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">JEP 8303099\uff08\u8349\u6848\u72b6\u6001\uff09\u6b63\u5f0f\u63d0\u51fa\u4e86\u201c<code>Null-Restricted and Nullable Types (Preview)<\/code>\u201d\u7279\u6027\u3002\u5b83\u7684\u6838\u5fc3\u662f\u5185\u5bb9\u5f15\u5165\u4e24\u79cd<code>\u7a7a\u503c\u6807\u8bb0\uff08nullness markers\uff09<\/code>\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><code>T!<\/code>\uff1a\u4e0d\u53ef\u7a7a\u7c7b\u578b\uff08Null-Restricted\uff09\uff0c\u8868\u793a\u8be5\u7c7b\u578b\u7684\u503c\u7edd\u4e0d\u80fd\u4e3a <code>null<\/code>\u3002<\/li><li><code>T?<\/code>\uff1a\u53ef\u7a7a\u7c7b\u578b\uff08Nullable\uff09\uff0c\u8868\u793a\u8be5\u7c7b\u578b\u660e\u786e\u5141\u8bb8 <code>null<\/code>\u3002<\/li><li><code>T<\/code>\uff08\u65e0\u6807\u8bb0\uff09\uff1a\u7a7a\u503c\u672a\u6307\u5b9a\uff08Unspecified\uff09\uff0c\u5373\u4f20\u7edf Java \u884c\u4e3a\uff0c\u517c\u5bb9\u73b0\u6709\u4ee3\u7801\u3002<\/li><\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u793a\u4f8b\u8bed\u6cd5<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>String! name;   \/\/ \u4e0d\u53ef\u7a7a\u5b57\u7b26\u4e32\uff0c\u4e0d\u80fd\u8d4b null\nString? title;  \/\/ \u53ef\u7a7a\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u8d4b null\nString desc;    \/\/ \u4f20\u7edf\u5199\u6cd5\uff0c\u7a7a\u503c\u8bed\u4e49\u672a\u6307\u5b9a<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e0e Kotlin \u7684 <code>String<\/code> \/ <code>String?<\/code> \u6070\u597d\u76f8\u53cd\u3002Kotlin \u9ed8\u8ba4\u975e\u7a7a\uff0c\u800c Java \u9ed8\u8ba4\u201c\u672a\u6307\u5b9a\u201d\uff0c\u4ee5\u4fdd\u8bc1\u6700\u5927\u517c\u5bb9\u6027\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8981\u89e3\u51b3\u7684\u6838\u5fc3\u95ee\u9898<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u6d88\u9664\u610f\u5916\u7684 <code>null<\/code><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f00\u53d1\u8005\u53ef\u4ee5<code>\u663e\u5f0f\u58f0\u660e\u610f\u56fe<\/code>\uff0c\u8fd9\u4e2a\u5b57\u6bb5\u3001\u53c2\u6570\u3001\u8fd4\u56de\u503c\u662f\u5426\u5e94\u8be5\u63a5\u53d7<code>null<\/code>\u3002\u7f16\u8bd1\u5668\u548c\u8fd0\u884c\u65f6\u5c06\u5171\u540c\u534f\u4f5c\uff0c\u9632\u6b62\u8fdd\u53cd\u7ea6\u5b9a\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u652f\u6301\u503c\u7c7b\u578b\u7684\u201c\u6241\u5e73\u5316\u201d\u4f18\u5316<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Valhalla \u7684\u503c\u7c7b\u578b\uff08Value Class\uff09\u65e8\u5728\u6d88\u9664\u5bf9\u8c61\u5934\u5f00\u9500\uff0c\u5b9e\u73b0\u201c\u5185\u8054\u5b58\u50a8\u201d\uff08flattening\uff09\u3002\u4f46\u5982\u679c\u4e00\u4e2a\u503c\u7c7b\u578b\u5b57\u6bb5\u53ef\u4ee5\u4e3a<code>null<\/code>\uff0cJVM \u5c31\u5fc5\u987b\u989d\u5916\u4fdd\u7559\u4e00\u4e2a bit \u6765\u6807\u8bb0 null \u72b6\u6001\uff0c\u7834\u574f\u4e86\u5185\u5b58\u5e03\u5c40\u7684\u7d27\u51d1\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7 <code>MyValue!<\/code> \u58f0\u660e\u4e0d\u53ef\u7a7a\uff0cJVM \u5c31\u80fd\u5b89\u5168\u5730\u8fdb\u884c\u6781\u81f4\u4f18\u5316\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u589e\u5f3a\u6a21\u5f0f\u5339\u914d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u589e\u5f3a\u6a21\u5f0f\u5339\u914d\uff0c\u4ee5\u53ca switch \u7684 exhaustiveness\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 Amber \u9879\u76ee\u4e2d\uff0c<code>switch<\/code>\u8868\u8fbe\u5f0f\u7684\u7a77\u5c3d\u6027\u68c0\u67e5\u4f1a\u53d7\u5230<code>null<\/code>\u7684\u5f71\u54cd\u3002\u660e\u786e\u7684\u7a7a\u503c\u7c7b\u578b\u80fd\u8ba9\u7f16\u8bd1\u5668\u505a\u51fa\u66f4\u7cbe\u786e\u7684\u5224\u65ad\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5173\u952e\u673a\u5236\u8be6\u89e3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\uff0c\u6211\u4eec\u7a0d\u5fae\u5c55\u5f00\u4e00\u4e0b\u8fd9\u5176\u4e2d\u7684\u5173\u952e\u673a\u5236\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u521d\u59cb\u5316\u4fdd\u8bc1<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u53ef\u7a7a\u5b57\u6bb5<code>\u5fc5\u987b\u5728\u4f7f\u7528\u524d\u88ab\u521d\u59cb\u5316<\/code>\uff0c\u5426\u5219\u7f16\u8bd1\u62a5\u9519\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>class Person {\n    private String! name; \/\/ \u5fc5\u987b\u521d\u59cb\u5316\n    public Person(String name) {\n        this.name = name; \/\/ \u5728 super() \u524d\u5b8c\u6210\n        super();\n    }\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u9759\u6001\u5b57\u6bb5\u548c\u6570\u7ec4\u540c\u7406\uff0c\u672a\u521d\u59cb\u5316\u7684\u4e0d\u53ef\u7a7a\u6570\u7ec4\u7ec4\u4ef6\u4f1a\u5bfc\u81f4\u8fd0\u884c\u65f6\u5f02\u5e38\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7a7a\u503c\u8f6c\u6362\uff08Nullness Conversion\uff09<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>\u5bbd\u5316\u8f6c\u6362\uff08Widening\uff09\uff1a<code>T!<\/code> \u2192 <code>T<\/code> \u6216 <code>T?<\/code>\uff0c\u5b89\u5168\uff0c\u65e0\u8b66\u544a\u3002<\/li><li>\u7a84\u5316\u8f6c\u6362\uff08Narrowing\uff09\uff1a<code>T?<\/code> \u2192 <code>T!<\/code>\uff0c\u7f16\u8bd1\u5668\u81ea\u52a8\u63d2\u5165\u8fd0\u884c\u65f6\u68c0\u67e5\uff0c\u82e5\u503c\u4e3a<code>null<\/code>\u5219\u629b\u51fa<code>NullPointerException<\/code>\u3002<\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>String? s = null;\n\/\/ \u7f16\u8bd1\u901a\u8fc7\uff0c\u4f46\u8fd0\u884c\u65f6\u629b NPE\nString! t = s; <\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u79cd\u8bbe\u8ba1\u7c7b\u4f3c\u4e8e\u81ea\u52a8\u88c5\u7bb1\u3001\u62c6\u7bb1\uff0c\u4f46\u589e\u52a0\u4e86\u7a7a\u5b89\u5168\u8bed\u4e49\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u6cdb\u578b\u4e0e\u53cd\u5c04\u652f\u6301<\/h3>\n\n\n\n<ul class=\"wp-block-list\"><li>\u6cdb\u578b\u53c2\u6570\u4e5f\u53ef\u5e26\u7a7a\u503c\u6807\u8bb0\uff1a<code>List&lt;String!&gt;<\/code>\u3002<\/li><li>\u53cd\u5c04 API \u65b0\u589e <code>RuntimeType<\/code>\uff0c\u7528\u4e8e\u63cf\u8ff0\u8fd0\u884c\u65f6\u5b9e\u9645\u7684\u7a7a\u503c\u7ea6\u675f\u3002<\/li><li><code>javadoc<\/code> \u5c06\u663e\u793a\u7a7a\u503c\u6807\u8bb0\uff0c\u63d0\u5347 API \u6587\u6863\u6e05\u6670\u5ea6\u3002<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u5f53\u524d\u8fdb\u5c55\u4e0e\u672a\u6765\u5c55\u671b<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>\u72b6\u6001\uff1aJEP 8303099 \u76ee\u524d\u4ecd\u4e3a Draft\uff08\u8349\u6848\uff09\uff0c\u5c1a\u672a\u96c6\u6210\u5230\u4efb\u4f55\u6b63\u5f0f JDK \u7248\u672c\u4e2d\u3002<\/li><li>\u4f9d\u8d56\uff1a\u8be5\u7279\u6027\u4f9d\u8d56\u4e8e<code>Flexible Constructor Bodies<\/code>\uff08\u5df2\u5728 JDK 24 Preview\uff09\u7b49\u524d\u7f6e JEP\u3002<\/li><li>\u8def\u7ebf\u56fe\uff1a\u9884\u8ba1\u5c06\u5728 JDK 27 \u6216 JDK 28 \u4e2d\u4f5c\u4e3a<code>Preview Feature<\/code>\u9996\u6b21\u4eae\u76f8\u3002<\/li><li>\u793e\u533a\u53cd\u9988\uff1aOpenJDK Valhalla \u90ae\u4ef6\u5217\u8868\u6b63\u5728\u79ef\u6781\u8ba8\u8bba\u7ec6\u8282\uff0c\u6b22\u8fce\u5f00\u53d1\u8005\u53c2\u4e0e\u6d4b\u8bd5\u65e9\u671f\u539f\u578b\uff08\u5982 LW5\uff09\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u603b\u4e4b\uff0c\u662f\u4e00\u4e2a\u597d\u7684\u5146\u5934\uff0c\u4f46\u4e5f\u5b58\u5728\u8df3\u7968\u7684\u53ef\u80fd\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7ed3\u8bed<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u53ef\u7a7a\u7c7b\u578b\u4e0d\u662f\u4e3a\u4e86\u201c\u6d88\u706d<code>null<\/code>\u201d\u6216\u5f7b\u5e95\u629b\u5f03 null\uff0c\u800c\u662f\u4e3a\u4e86\u8ba9<code>null<\/code>\u7684\u5b58\u5728\u53d8\u5f97\u53ef\u63a7\u3001\u53ef\u9884\u671f\u3001\u53ef\u9a8c\u8bc1\u3002\u5b83\u4ee3\u8868\u4e86 Java \u5728\u4fdd\u6301\u5411\u540e\u517c\u5bb9\u7684\u524d\u63d0\u4e0b\uff0c\u5411\u73b0\u4ee3\u7c7b\u578b\u7cfb\u7edf\u8fc8\u51fa\u7684\u5173\u952e\u4e00\u6b65\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5bf9\u4e8e\u5e7f\u5927 Java \u5f00\u53d1\u8005\u800c\u8a00\uff0c\u4e0d\u4ec5\u610f\u5473\u7740\u66f4\u5c11\u7684 NPE\uff0c\u66f4\u610f\u5473\u7740\u66f4\u6e05\u6670\u7684 API \u8bbe\u8ba1\u3001\u66f4\u5f3a\u7684\u6027\u80fd\u6f5c\u529b\uff0c\u4ee5\u53ca\u4e00\u4e2a\u66f4\u5b89\u5168\u3001\u66f4\u9ad8\u6548\u7684\u672a\u6765\u3002\u671f\u5f85\u8fd9\u4e2a\u7279\u6027\u65e9\u65e5\u4e0a\u65b0\uff01<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u53c2\u8003\u8d44\u6599<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li>JEP 8303099 \u5b98\u65b9\u8349\u6848<code>https:\/\/openjdk.org\/jeps\/8303099<\/code><\/li><li><code>https:\/\/dev.to\/gouthamrayaprolu\/why-project-valhalla-will-revolutionize-java-performance-in-2026-3ea6<\/code><\/li><li><code>https:\/\/horstmann.com\/presentations\/2025\/jcon-valhalla\/<\/code><\/li><li>Brian Goetz \u5173\u4e8e Valhalla \u7684\u6280\u672f\u6f14\u8bb2<code>https:\/\/mirakl.tech\/java-how-to-avoid-the-billion-dollar-mistake-f84a7189d4dd<\/code><\/li><\/ul>\n<!-- <audio autoplay=\"autoplay\" height=\"100\" width=\"100\" hidden=\"true\"><source src=\"https:\/\/c.coka.la\/orAvPR.mp3\" type=\"audio\/mp3\"\/><\/audio><img decoding=\"async\" src=\"https:\/\/images.weserv.nl\/?url=https:\/\/ws3.sinaimg.cn\/large\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/> --><p><!-- <img decoding=\"async\" src=\"https:\/\/raw.githubusercontent.com\/xmt1139057136\/xttblog\/master\/8fa5dcfcgy1g4em3rzar5j20ib089ae0.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/>--><img decoding=\"async\" src=\"https:\/\/saas.51autoparts.cn\/api\/admin\/sys-file\/oss\/file?fileName=84db51f8561e448f9a4fda2eff0811f9.jpg\" alt=\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/><\/p><p>\u6700\u540e\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u4e2a\u4eba\u5fae\u4fe1\u516c\u4f17\u53f7\uff1a\u4e1a\u4f59\u8349\uff08yyucao\uff09\uff01<b>\u53ef\u52a0\u4f5c\u8005\u5fae\u4fe1\u53f7\uff1a<font color=\"red\">xttblog2<\/font>\u3002\u5907\u6ce8\uff1a\u201c1\u201d\uff0c\u6dfb\u52a0\u535a\u4e3b\u5fae\u4fe1\u62c9\u4f60\u8fdb\u5fae\u4fe1\u7fa4\u3002\u5907\u6ce8\u9519\u8bef\u4e0d\u4f1a\u540c\u610f\u597d\u53cb\u7533\u8bf7\u3002<\/b>\u518d\u6b21\u611f\u8c22\u60a8\u7684\u5173\u6ce8\uff01\u540e\u7eed\u6709\u7cbe\u5f69\u5185\u5bb9\u4f1a\u7b2c\u4e00\u65f6\u95f4\u53d1\u7ed9\u60a8\uff01\u539f\u521b\u6587\u7ae0\u6295\u7a3f\u8bf7\u53d1\u9001\u81f3532009913@qq.com\u90ae\u7bb1\u3002\u5546\u52a1\u5408\u4f5c\u4e5f\u53ef\u6dfb\u52a0\u4f5c\u8005\u5fae\u4fe1\u8fdb\u884c\u8054\u7cfb\uff01<\/p><p>\u672c\u6587\u539f\u6587\u51fa\u5904\uff1a<a href=\"https:\/\/www.xttblog.com\">\u4e1a\u4f59\u8349<\/a>\uff1a &raquo; <a href=\"https:\/\/www.xttblog.com\/?p=5526\">Java \u7684 Valhalla \u9879\u76ee\u7ec8\u4e8e\u5bf9 null \u52a8\u624b\u4e86\uff0cJEP 8303099 \u5c06\u7ec8\u7ed3 NPE \u7a7a\u6307\u9488\u5f02\u5e38<\/a><\/p><!-- <div class=\"bd-reward-stl\"><button id=\"bdRewardBtn\"><span><\/span><\/button><\/div> -->","protected":false},"excerpt":{"rendered":"<p>Java \u7684 Valhalla \u9879\u76ee\u7ec8\u4e8e\u5bf9 null \u52a8\u624b\u4e86\uff0cJEP 8303099 \u5c06\u7ec8\u7ed3 NPE \u7a7a\u6307\u9488\u5f02 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[1770,1844,267,1799,1471],"class_list":["post-5526","post","type-post","status-publish","format-standard","hentry","category-java","tag-jpa","tag-jps","tag-nullpointerexception","tag-numericdocvaluesfield","tag-optional"],"_links":{"self":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/5526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5526"}],"version-history":[{"count":1,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/5526\/revisions"}],"predecessor-version":[{"id":5527,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/5526\/revisions\/5527"}],"wp:attachment":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}