{"id":836,"date":"2026-02-26T08:43:09","date_gmt":"2026-02-26T00:43:09","guid":{"rendered":"http:\/\/47.100.165.17\/wordpress\/?p=836"},"modified":"2026-02-26T08:43:11","modified_gmt":"2026-02-26T00:43:11","slug":"%e3%80%90java%e3%80%91jdk%e5%a4%9a%e7%b3%bb%e7%bb%9f%e5%ae%89%e8%a3%85%e5%ae%9e%e6%88%98%e6%a1%88%e4%be%8b%e5%ba%95%e5%b1%82%e5%8e%9f%e7%90%86%e6%8b%86%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/yunyanglib.cn\/?p=836","title":{"rendered":"\u3010Java\u3011JDK\u591a\u7cfb\u7edf\u5b89\u88c5+\u5b9e\u6218\u6848\u4f8b+\u5e95\u5c42\u539f\u7406\u62c6\u89e3"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u4e0a\u4e00\u7bc7\u5206\u4eab\u4e86 Java \u6838\u5fc3\u6982\u5ff5\u540e\uff0c\u4e0d\u5c11\u8fdb\u9636\u5f00\u53d1\u8005\u53cd\u9988\u60f3\u8865\u5145\u73af\u5883\u914d\u7f6e\u5b9e\u64cd\u548c\u5b9e\u6218\u6848\u4f8b \u2014\u2014 \u6bd5\u7adf\u57fa\u7840\u6982\u5ff5\u9700\u8981\u843d\u5730\u9a8c\u8bc1\uff0c\u8fdb\u9636\u5b66\u4e60\u66f4\u8981 \u201c\u539f\u7406 + \u5b9e\u64cd\u201d \u53cc\u7ba1\u9f50\u4e0b\u3002\u4eca\u5929\u8fd9\u7bc7\u5c31\u805a\u7126<strong>JDK \u591a\u7cfb\u7edf\u5b89\u88c5\uff08Windows\/macOS\/Linux\uff09\u3001\u8fdb\u9636\u5b9e\u6218\u6848\u4f8b\u3001\u5e95\u5c42\u5b57\u8282\u7801\u5206\u6790<\/strong>\uff0c\u5e2e\u5927\u5bb6\u5de9\u56fa\u57fa\u7840\u7684\u540c\u65f6\uff0c\u6253\u901a \u201c\u6982\u5ff5 &#8211; \u5b9e\u64cd &#8211; \u539f\u7406\u201d \u7684\u903b\u8f91\u94fe\uff0c\u9002\u5408\u6709\u4e00\u5b9a\u57fa\u7840\u60f3\u6df1\u5316\u7406\u89e3\u7684\u5f00\u53d1\u8005\uff5e<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u6838\u5fc3\u6982\u5ff5\u8fdb\u9636\uff1aJDK \u76ee\u5f55\u89e3\u6790\uff08\u8fdb\u9636\u5fc5\u5907\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u5b89\u88c5 JDK \u524d\uff0c\u5148\u641e\u61c2\u5176\u76ee\u5f55\u7ed3\u6784\uff0c\u80fd\u5e2e\u4f60\u66f4\u597d\u5730\u7406\u89e3\u73af\u5883\u914d\u7f6e\u539f\u7406\uff08\u4ee5 JDK 17 LTS \u4e3a\u4f8b\uff09\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jdk-17.0.9\/\n\u251c\u2500\u2500 bin\/          # \u6838\u5fc3\u5de5\u5177\uff1ajavac\uff08\u7f16\u8bd1\uff09\u3001java\uff08\u8fd0\u884c\uff09\u3001javadoc\uff08\u6587\u6863\uff09\u3001javap\uff08\u5b57\u8282\u7801\u5206\u6790\uff09\u7b49\n\u251c\u2500\u2500 lib\/          # \u6838\u5fc3\u7c7b\u5e93\u3001\u5de5\u5177\u7c7b\u4f9d\u8d56\uff08\u5982rt.jar\uff09\n\u251c\u2500\u2500 conf\/         # \u914d\u7f6e\u6587\u4ef6\uff08\u5982jre\u914d\u7f6e\u3001\u5b89\u5168\u7b56\u7565\uff09\n\u251c\u2500\u2500 jmods\/        # \u6a21\u5757\u5316\u76f8\u5173\u6587\u4ef6\uff08Java 9+\u65b0\u589e\uff09\n\u2514\u2500\u2500 README.html   # \u5b98\u65b9\u8bf4\u660e\u6587\u6863\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8fdb\u9636\u63d0\u793a<\/strong>\uff1a<code>bin<\/code>\u76ee\u5f55\u662f\u5de5\u5177\u6838\u5fc3\uff0c<code>lib<\/code>\u76ee\u5f55\u662f\u8fd0\u884c\u4f9d\u8d56\uff0c\u73af\u5883\u53d8\u91cf\u914d\u7f6e\u672c\u8d28\u662f\u8ba9\u7cfb\u7edf\u80fd\u627e\u5230<code>bin<\/code>\u4e0b\u7684\u5de5\u5177\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001JDK \u591a\u7cfb\u7edf\u5b89\u88c5 + \u73af\u5883\u914d\u7f6e\uff08\u5b9e\u64cd + \u95ee\u9898\u6392\u67e5\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a8\u8350\u5b89\u88c5<strong>LTS \u957f\u671f\u652f\u6301\u7248\u672c<\/strong>\uff08\u5982 JDK 17\u3001JDK 21\uff09\uff0c\u7a33\u5b9a\u6027\u66f4\u5f3a\uff0c\u9002\u5408\u5f00\u53d1\u548c\u751f\u4ea7\u73af\u5883\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Windows 10\/11 \u7cfb\u7edf<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b65\u9aa4 1\uff1a\u4e0b\u8f7d JDK<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b98\u7f51\u5730\u5740\uff1a<a href=\"https:\/\/www.oracle.com\/java\/technologies\/downloads\/#java17\" target=\"_blank\" rel=\"noreferrer noopener\">Oracle JDK 17<\/a>\uff08\u9700\u6ce8\u518c Oracle \u8d26\u53f7\uff09<\/li>\n\n\n\n<li>\u955c\u50cf\u5730\u5740\uff08\u63a8\u8350\uff0c\u65e0\u9700\u6ce8\u518c\uff09\uff1a<a href=\"https:\/\/repo.huaweicloud.com\/java\/jdk\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u534e\u4e3a\u4e91\u955c\u50cf<\/a><\/li>\n\n\n\n<li>\u9009\u62e9\uff1a<code>jdk-17.0.9_windows-x64_bin.exe<\/code>\uff08exe \u5b89\u88c5\u5305\uff09\u6216<code>zip<\/code>\u538b\u7f29\u5305<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b65\u9aa4 2\uff1a\u5b89\u88c5 JDK<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>exe \u5305\uff1a\u53cc\u51fb\u8fd0\u884c\uff0c\u6ce8\u610f<strong>\u53d6\u6d88\u52fe\u9009 \u201c\u81ea\u52a8\u8bbe\u7f6e\u73af\u5883\u53d8\u91cf\u201d<\/strong>\uff08\u624b\u52a8\u914d\u7f6e\u66f4\u7075\u6d3b\uff09\uff0c\u9009\u62e9\u5b89\u88c5\u8def\u5f84\uff08\u5efa\u8bae\u65e0\u7a7a\u683c\u65e0\u4e2d\u6587\uff0c\u5982<code>D:\\Program Files\\Java\\jdk-17.0.9<\/code>\uff09<\/li>\n\n\n\n<li>zip \u5305\uff1a\u76f4\u63a5\u89e3\u538b\u5230\u76ee\u6807\u8def\u5f84\u5373\u53ef\uff08\u514d\u5b89\u88c5\uff09<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b65\u9aa4 3\uff1a\u914d\u7f6e\u73af\u5883\u53d8\u91cf\uff08\u5173\u952e\uff09<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u53f3\u952e \u201c\u6b64\u7535\u8111\u201d\u2192\u5c5e\u6027\u2192\u9ad8\u7ea7\u7cfb\u7edf\u8bbe\u7f6e\u2192\u73af\u5883\u53d8\u91cf<\/li>\n\n\n\n<li>\u7cfb\u7edf\u53d8\u91cf\u4e2d\u65b0\u589e\uff1a\n<ul class=\"wp-block-list\">\n<li>\u53d8\u91cf\u540d\uff1a<code>JAVA_HOME<\/code>\uff0c\u53d8\u91cf\u503c\uff1aJDK \u5b89\u88c5\u8def\u5f84\uff08\u5982<code>D:\\Program Files\\Java\\jdk-17.0.9<\/code>\uff09<\/li>\n\n\n\n<li>\u53d8\u91cf\u540d\uff1a<code>CLASSPATH<\/code>\uff0c\u53d8\u91cf\u503c\uff1a<code>.;%JAVA_HOME%\\lib\\dt.jar;%JAVA_HOME%\\lib\\tools.jar<\/code>\uff08<code>.<\/code>\u8868\u793a\u5f53\u524d\u76ee\u5f55\uff09<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u7f16\u8f91\u7cfb\u7edf\u53d8\u91cf<code>Path<\/code>\uff0c\u65b0\u589e\u4e24\u6761\uff1a\n<ul class=\"wp-block-list\">\n<li><code>%JAVA_HOME%\\bin<\/code><\/li>\n\n\n\n<li><code>%JAVA_HOME%\\jre\\bin<\/code>\uff08JDK 17 \u9ed8\u8ba4\u65e0\u5355\u72ec jre \u76ee\u5f55\uff0c\u53ef\u901a\u8fc7<code>bin\\jlink.exe --module-path jmods --add-modules java.desktop --output jre<\/code>\u751f\u6210\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b65\u9aa4 4\uff1a\u9a8c\u8bc1\u4e0e\u95ee\u9898\u6392\u67e5<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9a8c\u8bc1\uff1a\u6253\u5f00 cmd\uff0c\u8f93\u5165<code>java -version<\/code>\uff08\u663e\u793a JDK \u7248\u672c\uff09\u3001<code>javac -version<\/code>\uff08\u663e\u793a\u7f16\u8bd1\u5668\u7248\u672c\uff09\uff0c\u5747\u6b63\u5e38\u5219\u914d\u7f6e\u6210\u529f<\/li>\n\n\n\n<li>\u5e38\u89c1\u95ee\u9898\uff1a\n<ul class=\"wp-block-list\">\n<li>\u201cjavac \u4e0d\u662f\u5185\u90e8\u6216\u5916\u90e8\u547d\u4ee4\u201d\uff1aPath \u53d8\u91cf\u672a\u914d\u7f6e\u6b63\u786e\uff0c\u68c0\u67e5\u8def\u5f84\u662f\u5426\u62fc\u5199\u9519\u8bef<\/li>\n\n\n\n<li>\u7248\u672c\u51b2\u7a81\uff1a\u7535\u8111\u4e2d\u5b58\u5728\u591a\u4e2a JDK\uff0c\u9700\u786e\u4fdd JAVA_HOME \u6307\u5411\u76ee\u6807\u7248\u672c\uff0c\u4e14 Path \u4e2d\u76ee\u6807 JDK \u7684 bin \u8def\u5f84\u5728\u6700\u524d\u9762<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. macOS \u7cfb\u7edf\uff08Intel\/M1 \u901a\u7528\uff09<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b65\u9aa4 1\uff1a\u4e0b\u8f7d JDK<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9009\u62e9\uff1a<code>jdk-17.0.9_macos-x64_bin.dmg<\/code>\uff08Intel \u82af\u7247\uff09\u6216<code>jdk-17.0.9_macos-aarch64_bin.dmg<\/code>\uff08M1\/M2 \u82af\u7247\uff09<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b65\u9aa4 2\uff1a\u5b89\u88c5\u4e0e\u914d\u7f6e<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u53cc\u51fb dmg \u6587\u4ef6\u5b89\u88c5\uff0c\u9ed8\u8ba4\u8def\u5f84\uff1a<code>\/Library\/Java\/JavaVirtualMachines\/jdk-17.0.9.jdk\/Contents\/Home<\/code><\/li>\n\n\n\n<li>\u914d\u7f6e\u73af\u5883\u53d8\u91cf\uff08.zshrc \u6216.bash_profile\uff09\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6253\u5f00\u7ec8\u7aef\uff0c\u8f93\u5165<code>vim ~\/.zshrc<\/code>\uff08macOS 10.15 + \u9ed8\u8ba4 zsh\uff09<\/li>\n\n\n\n<li>\u65b0\u589e\u5185\u5bb9\uff1a<code>export JAVA_HOME=\/Library\/Java\/JavaVirtualMachines\/jdk-17.0.9.jdk\/Contents\/Home export PATH=$JAVA_HOME\/bin:$PATH:. export CLASSPATH=$JAVA_HOME\/lib\/tools.jar:$JAVA_HOME\/lib\/dt.jar:.<\/code><\/li>\n\n\n\n<li>\u751f\u6548\u914d\u7f6e\uff1a<code>source ~\/.zshrc<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b65\u9aa4 3\uff1a\u9a8c\u8bc1<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7ec8\u7aef\u8f93\u5165<code>java -version<\/code>\u548c<code>javac -version<\/code>\uff0c\u663e\u793a\u7248\u672c\u5373\u6210\u529f<\/li>\n\n\n\n<li>\u7248\u672c\u7ba1\u7406\uff1a\u82e5\u9700\u5207\u6362\u591a JDK\uff0c\u53ef\u4f7f\u7528<code>\/usr\/libexec\/java_home -V<\/code>\u67e5\u770b\u6240\u6709 JDK \u8def\u5f84\uff0c\u901a\u8fc7\u4fee\u6539 JAVA_HOME \u5207\u6362<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. Linux \u7cfb\u7edf\uff08Ubuntu\/CentOS \u901a\u7528\uff09<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b65\u9aa4 1\uff1a\u4e0b\u8f7d JDK<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9009\u62e9\uff1a<code>jdk-17.0.9_linux-x64_bin.tar.gz<\/code>\uff0864 \u4f4d\u7cfb\u7edf\uff09<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b65\u9aa4 2\uff1a\u89e3\u538b\u4e0e\u914d\u7f6e<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u89e3\u538b\u5230\u6307\u5b9a\u76ee\u5f55\uff08\u5982<code>\/usr\/local\/java<\/code>\uff09\uff1a<code>sudo mkdir -p \/usr\/local\/java sudo tar -zxvf jdk-17.0.9_linux-x64_bin.tar.gz -C \/usr\/local\/java<\/code><\/li>\n\n\n\n<li>\u914d\u7f6e\u5168\u5c40\u73af\u5883\u53d8\u91cf\uff08<code>\/etc\/profile<\/code>\uff09\uff1a<code>sudo vim \/etc\/profile<\/code>\n<ul class=\"wp-block-list\">\n<li>\u65b0\u589e\u5185\u5bb9\uff1abash<code>export JAVA_HOME=\/usr\/local\/java\/jdk-17.0.9 export PATH=$JAVA_HOME\/bin:$PATH:. export CLASSPATH=$JAVA_HOME\/lib\/tools.jar:$JAVA_HOME\/lib\/dt.jar:.<\/code><\/li>\n\n\n\n<li>\u751f\u6548\u914d\u7f6e\uff1a<code>source \/etc\/profile<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u6b65\u9aa4 3\uff1a\u9a8c\u8bc1\u4e0e\u7248\u672c\u5207\u6362<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9a8c\u8bc1\uff1a<code>java -version<\/code>\u3001<code>javac -version<\/code><\/li>\n\n\n\n<li>\u591a JDK \u5207\u6362\uff08Ubuntu\uff09\uff1abash<code>sudo update-alternatives --install \/usr\/bin\/java java $JAVA_HOME\/bin\/java 100 sudo update-alternatives --config java # \u9009\u62e9\u76ee\u6807JDK\u7248\u672c<\/code><\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u8fdb\u9636\u5b9e\u6218\u6848\u4f8b\uff1a\u6df1\u5ea6\u7406\u89e3 Java \u6267\u884c\u673a\u5236<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u6848\u4f8b 1\uff1a\u70ed\u70b9\u4ee3\u7801\u4e0e JIT \u7f16\u8bd1\u9a8c\u8bc1<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u76ee\u6807\uff1a\u901a\u8fc7\u4ee3\u7801\u89e6\u53d1 JIT \u7f16\u8bd1\uff0c\u7406\u89e3\u6df7\u5408\u6267\u884c\u6a21\u5f0f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ JitDemo.java\npublic class JitDemo {\n    \/\/ \u70ed\u70b9\u65b9\u6cd5\uff1a\u6a21\u62df\u9891\u7e41\u6267\u884c\u7684\u4ee3\u7801\n    public static int calculate(int a, int b) {\n        \/\/ \u590d\u6742\u8ba1\u7b97\uff08\u89e6\u53d1JIT\u7f16\u8bd1\uff09\n        int result = 0;\n        for (int i = 0; i 000; i++) {\n            result += (a + b) * i - (a - b) \/ 2;\n        }\n        return result;\n    }\n\n    public static void main(String&#91;] args) {\n        long start = System.currentTimeMillis();\n        \/\/ \u5faa\u73af\u8c03\u7528calculate\u65b9\u6cd5\uff0c\u5236\u9020\u70ed\u70b9\u4ee3\u7801\n        for (int i = 0; i 00000; i++) {\n            calculate(10, 20);\n        }\n        long end = System.currentTimeMillis();\n        System.out.println(\"\u6267\u884c\u8017\u65f6\uff1a\" + (end - start) + \"ms\");\n    }\n}\n<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\">\u5b9e\u64cd\u6b65\u9aa4\uff1a<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u7f16\u8bd1\uff1a<code>javac JitDemo.java<\/code><\/li>\n\n\n\n<li>\u8fd0\u884c\u5e76\u67e5\u770b JIT \u65e5\u5fd7\uff08\u9700\u5f00\u542f JVM \u53c2\u6570\uff09\uff1a<code>java -XX:+PrintCompilation JitDemo<\/code><\/li>\n\n\n\n<li>\u7ed3\u679c\u5206\u6790\uff1a\n<ul class=\"wp-block-list\">\n<li>\u7ec8\u7aef\u4f1a\u8f93\u51fa\u88ab JIT \u7f16\u8bd1\u7684\u65b9\u6cd5\uff08\u5982<code>JitDemo.calculate()<\/code>\uff09\uff0c\u8bf4\u660e\u70ed\u70b9\u4ee3\u7801\u88ab\u7f16\u8bd1\u4e3a\u673a\u5668\u6307\u4ee4<\/li>\n\n\n\n<li>\u5bf9\u6bd4\u5173\u95ed JIT\uff08<code>java -XX:-UseJITCompilation JitDemo<\/code>\uff09\u7684\u8017\u65f6\uff0c\u4f1a\u53d1\u73b0\u5f00\u542f JIT \u540e\u6267\u884c\u6548\u7387\u63d0\u5347\u660e\u663e\uff08\u901a\u5e38\u63d0\u5347 30%+\uff09<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u6848\u4f8b 2\uff1a\u5b57\u8282\u7801\u5206\u6790\uff08javap \u5de5\u5177\u4f7f\u7528\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u76ee\u6807\uff1a\u901a\u8fc7<code>javap<\/code>\u547d\u4ee4\u67e5\u770b.class \u6587\u4ef6\u7684\u5b57\u8282\u7801\uff0c\u7406\u89e3\u7f16\u8bd1\u8fc7\u7a0b<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u5b9e\u64cd\u6b65\u9aa4\uff1a<\/h4>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5bf9\u4e0a\u9762\u7684<code>JitDemo.class<\/code>\u6267\u884c\u5b57\u8282\u7801\u53cd\u7f16\u8bd1\uff1a<code>javap -c -v JitDemo.class > JitDemo.bytecode<\/code>\n<ul class=\"wp-block-list\">\n<li>\u53c2\u6570\u8bf4\u660e\uff1a<code>-c<\/code> \u8f93\u51fa\u6c47\u7f16\u6307\u4ee4\uff0c<code>-v<\/code> \u8f93\u51fa\u8be6\u7ec6\u4fe1\u606f\uff08\u5305\u62ec\u5e38\u91cf\u6c60\u3001\u65b9\u6cd5\u8868\u7b49\uff09<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5206\u6790\u5b57\u8282\u7801\u5173\u952e\u90e8\u5206\uff1a\n<ul class=\"wp-block-list\">\n<li>\u67e5\u770b<code>calculate<\/code>\u65b9\u6cd5\u7684\u5b57\u8282\u7801\u6307\u4ee4\uff08\u5982<code>iload<\/code>\u3001<code>imul<\/code>\u3001<code>iadd<\/code>\u7b49\uff09\uff0c\u5bf9\u5e94 Java \u4ee3\u7801\u7684\u903b\u8f91<\/li>\n\n\n\n<li>\u7ed3\u5408 JVM \u6307\u4ee4\u96c6\u624b\u518c\uff0c\u7406\u89e3 \u201c\u5b57\u8282\u7801\u2192\u673a\u5668\u6307\u4ee4\u201d \u7684\u6620\u5c04\u5173\u7cfb\uff0c\u6df1\u5316\u5bf9\u6267\u884c\u8fc7\u7a0b\u7684\u7406\u89e3<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u6848\u4f8b 3\uff1a\u8de8\u5e73\u53f0\u9a8c\u8bc1\uff08\u8fdb\u9636\u62d3\u5c55\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u76ee\u6807\uff1a\u9a8c\u8bc1 \u201c\u4e00\u6b21\u7f16\u8bd1\uff0c\u5230\u5904\u8fd0\u884c\u201d<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5728 Windows \u7cfb\u7edf\u7f16\u8bd1<code>JitDemo.java<\/code>\uff0c\u5f97\u5230<code>JitDemo.class<\/code><\/li>\n\n\n\n<li>\u5c06<code>JitDemo.class<\/code>\u590d\u5236\u5230 macOS\/Linux \u7cfb\u7edf<\/li>\n\n\n\n<li>\u76f4\u63a5\u8fd0\u884c\uff1a<code>java JitDemo<\/code>\uff0c\u89c2\u5bdf\u662f\u5426\u6b63\u5e38\u8f93\u51fa\u7ed3\u679c<\/li>\n\n\n\n<li>\u7ed3\u8bba\uff1a.class \u6587\u4ef6\u4e0d\u4f9d\u8d56\u64cd\u4f5c\u7cfb\u7edf\uff0c\u7531 JVM \u5c4f\u853d\u5dee\u5f02\uff0c\u9a8c\u8bc1 Java \u8de8\u5e73\u53f0\u7279\u6027<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u8fdb\u9636\u601d\u8003\u4e0e\u5b66\u4e60\u5efa\u8bae<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u73af\u5883\u914d\u7f6e\u8fdb\u9636<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u63a8\u8350\u4f7f\u7528<code>SDKMAN!<\/code>\uff08Linux\/macOS\uff09\u6216<code>jabba<\/code>\uff08Windows\uff09\u7ba1\u7406\u591a JDK \u7248\u672c\uff0c\u5207\u6362\u66f4\u9ad8\u6548<\/li>\n\n\n\n<li>\u751f\u4ea7\u73af\u5883\u4f18\u5148\u9009\u62e9 LTS \u7248\u672c\uff0c\u907f\u514d\u975e\u7a33\u5b9a\u7248\u672c\u7684\u517c\u5bb9\u6027\u95ee\u9898<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u6267\u884c\u673a\u5236\u6df1\u5316<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u7528<code>jvisualvm<\/code>\u5de5\u5177\uff08JDK \u81ea\u5e26\uff09\u76d1\u63a7 JVM \u8fd0\u884c\u72b6\u6001\uff0c\u67e5\u770b JIT \u7f16\u8bd1\u60c5\u51b5\u3001\u5185\u5b58\u4f7f\u7528\u7b49<\/li>\n\n\n\n<li>\u7814\u7a76 JVM \u53c2\u6570\u8c03\u4f18\uff08\u5982<code>-XX:CompileThreshold<\/code>\u8c03\u6574 JIT \u7f16\u8bd1\u9608\u503c\uff09\uff0c\u7406\u89e3\u53c2\u6570\u5bf9\u6027\u80fd\u7684\u5f71\u54cd<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u540e\u7eed\u5b66\u4e60\u65b9\u5411<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u6df1\u5165 JVM \u5185\u5b58\u6a21\u578b\u3001\u5783\u573e\u56de\u6536\u673a\u5236\uff08\u8fdb\u9636\u6838\u5fc3\uff09<\/li>\n\n\n\n<li>\u5b66\u4e60 Java \u6a21\u5757\u5316\uff08Module\uff09\u3001\u5bc6\u5c01\u7c7b\uff08Sealed Classes\uff09\u7b49\u65b0\u7279\u6027<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u5c0f\u7ed3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fdb\u9636\u5de9\u56fa\u7684\u6838\u5fc3\u5728\u4e8e \u201c\u5b9e\u64cd\u9a8c\u8bc1\u539f\u7406\uff0c\u5de5\u5177\u8f85\u52a9\u6df1\u5316\u201d\u2014\u2014 \u901a\u8fc7\u591a\u7cfb\u7edf JDK \u5b89\u88c5\uff0c\u638c\u63e1\u73af\u5883\u914d\u7f6e\u7684\u5e95\u5c42\u903b\u8f91\uff1b\u901a\u8fc7\u70ed\u70b9\u4ee3\u7801\u3001\u5b57\u8282\u7801\u5206\u6790\uff0c\u7406\u89e3 Java \u6267\u884c\u673a\u5236\u7684\u7ec6\u8282\uff1b\u901a\u8fc7\u8de8\u5e73\u53f0\u9a8c\u8bc1\uff0c\u5f3a\u5316\u6838\u5fc3\u7279\u6027\u8ba4\u77e5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0a\u4e00\u7bc7\u5206\u4eab\u4e86 Java \u6838\u5fc3\u6982\u5ff5\u540e\uff0c\u4e0d\u5c11\u8fdb\u9636\u5f00\u53d1\u8005\u53cd\u9988\u60f3\u8865\u5145\u73af\u5883\u914d\u7f6e\u5b9e\u64cd\u548c\u5b9e\u6218\u6848\u4f8b \u2014\u2014 \u6bd5\u7adf\u57fa\u7840\u6982\u5ff5\u9700\u8981\u843d\u5730<\/p>\n<div class=\"more-link\">\n\t\t\t\t <a href=\"https:\/\/yunyanglib.cn\/?p=836\" class=\"link-btn theme-btn\"><span>Read More <\/span> <i class=\"fa fa-caret-right\"><\/i><\/a>\n\t\t\t<\/div>\n","protected":false},"author":1,"featured_media":866,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[15],"class_list":["post-836","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","tag-java"],"_links":{"self":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=836"}],"version-history":[{"count":1,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/836\/revisions"}],"predecessor-version":[{"id":837,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/posts\/836\/revisions\/837"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=\/wp\/v2\/media\/866"}],"wp:attachment":[{"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yunyanglib.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}