{"id":486,"date":"2023-01-12T07:17:52","date_gmt":"2023-04-07T12:03:23","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/java-se-8%e9%9d%a2%e8%af%95%e9%97%ae%e9%a2%98%e5%92%8c%e7%ad%94%e6%a1%88%ef%bc%88%e9%83%a8%e5%88%86%e4%b8%80%ef%bc%89\/"},"modified":"2025-08-02T13:10:23","modified_gmt":"2025-08-02T05:10:23","slug":"java-se-8%e9%9d%a2%e8%af%95%e9%97%ae%e9%a2%98%e5%92%8c%e7%ad%94%e6%a1%88%ef%bc%88%e9%83%a8%e5%88%86%e4%b8%80%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java-se-8%e9%9d%a2%e8%af%95%e9%97%ae%e9%a2%98%e5%92%8c%e7%ad%94%e6%a1%88%ef%bc%88%e9%83%a8%e5%88%86%e4%b8%80%ef%bc%89\/","title":{"rendered":"Java SE 8\u9762\u8bd5\u9898\u4e0e\u7b54\u6848\u8be6\u89e3\uff08\u4e0a\u7bc7\uff09"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aJava SE 8\u9762\u8bd5\u95ee\u9898\u548c\u7b54\u6848\uff08\u90e8\u5206\u4e00\uff09\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51713\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u4e00\u4e9b\u4e0eJava SE 8\u9762\u8bd5\u76f8\u5173\u7684\u91cd\u8981\u95ee\u9898\u548c\u7b54\u6848\u3002\u6211\u5c06\u5199\u53e6\u4e00\u7bc7\u6587\u7ae0\u6765\u8ba8\u8bba\u5176\u4ed6\u7684Java SE 8\u9762\u8bd5\u95ee\u9898\u3002<\/p>\n<h2>Java 8 \u9762\u8bd5\u95ee\u9898<\/h2>\n<ol>\n<li>\u6211\u4eec\u4e3a\u4ec0\u4e48\u9700\u8981\u518d\u6b21\u8f6c\u5411Java\uff1f<\/li>\n<li>Java SE 8\u7684\u65b0\u7279\u6027\u662f\u4ec0\u4e48\uff1f<\/li>\n<li>Java SE 8\u7684\u65b0\u7279\u6027\u6709\u4ec0\u4e48\u4f18\u70b9\uff1f<\/li>\n<li>Lambda\u8868\u8fbe\u5f0f\u662f\u4ec0\u4e48\uff1f<\/li>\n<li>Lambda\u8868\u8fbe\u5f0f\u7531\u54ea\u4e09\u4e2a\u90e8\u5206\u7ec4\u6210\uff1fLambda\u8868\u8fbe\u5f0f\u7684\u7c7b\u578b\u662f\u4ec0\u4e48\uff1f<\/li>\n<li>\u51fd\u6570\u63a5\u53e3\u662f\u4ec0\u4e48\uff1fSAM\u63a5\u53e3\u662f\u4ec0\u4e48\uff1f<\/li>\n<li>\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u81ea\u5df1\u7684\u51fd\u6570\u63a5\u53e3\u5417\uff1f@FunctionalInterface\u662f\u4ec0\u4e48\uff1f\u5b9a\u4e49\u51fd\u6570\u63a5\u53e3\u7684\u89c4\u5219\u662f\u4ec0\u4e48\uff1f<\/li>\n<li>\u5b9a\u4e49\u51fd\u6570\u63a5\u53e3\u662f\u5426\u9700\u8981\u4f7f\u7528@FunctionalInterface\u6ce8\u89e3\uff1f@FunctionalInterface\u6ce8\u89e3\u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f\u4e3a\u4ec0\u4e48\u6211\u4eec\u9700\u8981Java\u4e2d\u7684\u51fd\u6570\u63a5\u53e3\uff1f<\/li>\n<li>\u4ec0\u4e48\u65f6\u5019\u4f7f\u7528Java 8\u7684\u6d41API\uff1f\u4e3a\u4ec0\u4e48\u6211\u4eec\u9700\u8981\u5728\u9879\u76ee\u4e2d\u4f7f\u7528Java 8\u7684\u6d41API\uff1f<\/li>\n<li>\u89e3\u91ca\u96c6\u5408API\u548c\u6d41API\u4e4b\u95f4\u7684\u533a\u522b\uff1f<\/li>\n<li>Java SE 8\u4e2d\u7684Spliterator\u662f\u4ec0\u4e48\uff1fIterator\u548cSpliterator\u5728Java SE 8\u4e2d\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/li>\n<li>Java 8\u4e2dOptional\u662f\u4ec0\u4e48\uff1fOptional\u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1fJava 8 Optional\u7684\u4f18\u70b9\u662f\u4ec0\u4e48\uff1f<\/li>\n<li>\u4ec0\u4e48\u662f\u7c7b\u578b\u63a8\u65ad\uff1f\u7c7b\u578b\u63a8\u65ad\u5728\u65e7\u7248\u672c\uff08\u5982Java 7\u53ca\u66f4\u65e9\u7248\u672c\uff09\u4e2d\u662f\u5426\u53ef\u7528\uff0c\u8fd8\u662f\u4ec5\u5728Java SE 8\u4e2d\u53ef\u7528\uff1f<\/li>\n<\/ol>\n<h3>Java 8\u9762\u8bd5\u95ee\u9898\u548c\u7b54\u6848<\/h3>\n<p>\u5728\u8fd9\u4e2a\u90e8\u5206\uff0c\u6211\u4eec\u5c06\u4ece\u4e4b\u524d\u7684\u90e8\u5206\u4e2d\u9009\u62e9\u6bcf\u4e2a\u95ee\u9898\uff0c\u5e76\u901a\u8fc7\u8be6\u7ec6\u7684\u63cf\u8ff0\u6765\u56de\u7b54\u3002\u5982\u679c\u60a8\u9700\u8981\u66f4\u591a\u7684\u4fe1\u606f\u548c\u793a\u4f8b\uff0c\u8bf7\u67e5\u9605\u300aJournalDEV\u300b\u4e0a\u63d0\u4f9b\u7684\u4e4b\u524d\u7684Java SE 8\u5e16\u5b50\u3002<\/p>\n<h3>\u6211\u4eec\u4e3a\u4ec0\u4e48\u9700\u8981\u518d\u6b21\u8f6c\u6362\u4e3aJava\u5462\uff1f<\/h3>\n<p>Oracle\u516c\u53f8\u5728Java SE 8\u4e2d\u5f15\u5165\u4e86\u8bb8\u591a\u65b0\u6982\u5ff5\uff0c\u65e8\u5728\u5e26\u6765\u4ee5\u4e0b\u7684\u597d\u5904\uff1a<\/p>\n<ul class=\"post-ul\">\n<li><strong>\u9ad8\u6548\u5229\u7528\u5f53\u524d\u591a\u6838CPU<\/strong><br \/>\n  \u6700\u8fd1\uff0c\u6211\u4eec\u53ef\u4ee5\u89c2\u5bdf\u5230\u786c\u4ef6\u65b9\u9762\u7684\u5de8\u5927\u53d8\u5316\u3002\u5982\u4eca\uff0c\u6240\u6709\u7cfb\u7edf\u90fd\u4f7f\u7528\u591a\u6838CPU\uff082\u6838\u30014\u6838\u30018\u6838\u300116\u6838\u7b49\uff09\u6765\u90e8\u7f72\u548c\u8fd0\u884c\u5b83\u4eec\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u6211\u4eec\u9700\u8981\u5728Java\u4e2d\u4f7f\u7528\u65b0\u7684\u7f16\u7a0b\u7ed3\u6784\u6765\u9ad8\u6548\u5229\u7528\u8fd9\u4e9b\u591a\u6838\u5904\u7406\u5668\uff0c\u4ee5\u5f00\u53d1\u9ad8\u5e76\u53d1\u548c\u9ad8\u53ef\u6269\u5c55\u6027\u7684\u5e94\u7528\u7a0b\u5e8f\u3002<\/li>\n<li><strong>\u5229\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u7279\u6027<\/strong><br \/>\n  Oracle Corporation\u5728Java SE 8\u4e2d\u5f15\u5165\u4e86\u8bb8\u591a\u51fd\u6570\u5f0f\u7f16\u7a0b\uff08FP\uff09\u6982\u5ff5\uff0c\u4ee5\u5229\u7528\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u4f18\u52bf\u3002<\/li>\n<\/ul>\n<h3>Java SE 8\u7684\u65b0\u7279\u6027\u662f\u4ec0\u4e48\uff1f<\/h3>\n<ul class=\"post-ul\">\n<li>Lambda\u8868\u8fbe\u5f0f\uff08Lambda Expressions\uff09<\/li>\n<li>\u51fd\u6570\u5f0f\u63a5\u53e3\uff08Functional Interfaces\uff09<\/li>\n<li>\u6d41API\uff08Stream API\uff09<\/li>\n<li>\u65e5\u671f\u548c\u65f6\u95f4API\uff08Date and Time API\uff09<\/li>\n<li>\u63a5\u53e3\u9ed8\u8ba4\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5\uff08Interface Default Methods and Static Methods\uff09<\/li>\n<li>\u5206\u5272\u8fed\u4ee3\u5668\uff08Spliterator\uff09<\/li>\n<li>\u65b9\u6cd5\u548c\u6784\u9020\u5668\u5f15\u7528\uff08Method and Constructor References\uff09<\/li>\n<li>\u96c6\u5408API\u589e\u5f3a\uff08Collections API Enhancements\uff09<\/li>\n<li>\u5e76\u53d1\u5de5\u5177\u589e\u5f3a\uff08Concurrency Utils Enhancements\uff09<\/li>\n<li>Fork\/Join\u6846\u67b6\u589e\u5f3a\uff08Fork\/Join Framework Enhancements\uff09<\/li>\n<li>\u5185\u90e8\u8fed\u4ee3\uff08Internal Iteration\uff09<\/li>\n<li>\u5e76\u884c\u6570\u7ec4\u548c\u5e76\u884c\u96c6\u5408\u64cd\u4f5c\uff08Parallel Array and Parallel Collection Operations\uff09<\/li>\n<li>Optional\u7c7b<\/li>\n<li>\u7c7b\u578b\u6ce8\u89e3\u548c\u53ef\u91cd\u590d\u6ce8\u89e3\uff08Type Annotations and Repeatable Annotations\uff09<\/li>\n<li>\u65b9\u6cd5\u53c2\u6570\u53cd\u5c04\uff08Method Parameter Reflection\uff09<\/li>\n<li>Base64\u7f16\u7801\u548c\u89e3\u7801\uff08Base64 Encoding and Decoding\uff09<\/li>\n<li>IO\u548cNIO2\u589e\u5f3a\uff08IO and NIO2 Enhancements\uff09<\/li>\n<li>Nashorn JavaScript\u5f15\u64ce<\/li>\n<li>javac\u589e\u5f3a<\/li>\n<li>JVM\u53d8\u66f4<\/li>\n<li>Java 8\u7cbe\u7b80\u914d\u7f6e\u6587\u4ef6\uff1acompact1\u3001compact2\u3001compact3<\/li>\n<li>JDBC 4.2<\/li>\n<li>JAXP 1.6<\/li>\n<li>Java DB 10.10<\/li>\n<li>\u7f51\u7edc\uff08Networking\uff09<\/li>\n<li>\u5b89\u5168\u53d8\u66f4\uff08Security Changes\uff09<\/li>\n<\/ul>\n<h3>Java SE 8\u65b0\u529f\u80fd\u7684\u597d\u5904\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u4eceJava SE 8\u65b0\u7279\u6027\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u83b7\u5f97\u4ee5\u4e0b\u597d\u5904\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u66f4\u7b80\u6d01\u548c\u53ef\u8bfb\u7684\u4ee3\u7801<\/li>\n<li>\u66f4\u53ef\u91cd\u7528\u7684\u4ee3\u7801<\/li>\n<li>\u66f4\u53ef\u6d4b\u8bd5\u548c\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801<\/li>\n<li>\u9ad8\u5e76\u53d1\u548c\u9ad8\u53ef\u6269\u5c55\u6027\u7684\u4ee3\u7801<\/li>\n<li>\u7f16\u5199\u5e76\u884c\u4ee3\u7801\u7684\u80fd\u529b<\/li>\n<li>\u7f16\u5199\u7c7b\u4f3c\u6570\u636e\u5e93\u64cd\u4f5c\u7684\u80fd\u529b<\/li>\n<li>\u6027\u80fd\u66f4\u597d\u7684\u5e94\u7528\u7a0b\u5e8f<\/li>\n<li>\u66f4\u9ad8\u751f\u4ea7\u529b\u7684\u4ee3\u7801<\/li>\n<\/ul>\n<h3>Lambda\u8868\u8fbe\u5f0f\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>Lambda\u8868\u8fbe\u5f0f\u662f\u4e00\u79cd\u533f\u540d\u51fd\u6570\uff0c\u5b83\u63a5\u53d7\u4e00\u7ec4\u8f93\u5165\u53c2\u6570\u5e76\u8fd4\u56de\u7ed3\u679c\u3002Lambda\u8868\u8fbe\u5f0f\u662f\u4e00\u6bb5\u6ca1\u6709\u4efb\u4f55\u540d\u79f0\u7684\u4ee3\u7801\u5757\uff0c\u53ef\u4ee5\u6709\u6216\u6ca1\u6709\u53c2\u6570\uff0c\u53ef\u4ee5\u6709\u6216\u6ca1\u6709\u7ed3\u679c\u3002\u8fd9\u6bb5\u4ee3\u7801\u5728\u9700\u8981\u65f6\u6267\u884c\u3002<\/p>\n<h3>Lambda\u8868\u8fbe\u5f0f\u6709\u54ea\u4e09\u4e2a\u90e8\u5206\uff1fLambda\u8868\u8fbe\u5f0f\u7684\u7c7b\u578b\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u4e00\u4e2aLambda\u8868\u8fbe\u5f0f\u5305\u542b3\u4e2a\u90e8\u5206\u3002<\/p>\n<ul class=\"post-ul\">\n<li><strong>\u53c2\u6570\u5217\u8868\uff08Parameter List\uff09<\/strong><br \/>\n  Lambda\u8868\u8fbe\u5f0f\u53ef\u4ee5\u5305\u542b\u96f6\u4e2a\u3001\u4e00\u4e2a\u6216\u591a\u4e2a\u53c2\u6570\u3002\u8fd9\u662f\u53ef\u9009\u7684\u3002<\/li>\n<li><strong>Lambda\u7bad\u5934\u8fd0\u7b97\u7b26\uff08Lambda Arrow Operator\uff09<\/strong><br \/>\n  &#8220;->&#8221; \u88ab\u79f0\u4e3aLambda\u7bad\u5934\u8fd0\u7b97\u7b26\u3002\u5b83\u5206\u9694\u53c2\u6570\u5217\u8868\u548c\u51fd\u6570\u4f53\u3002<\/li>\n<li><strong>Lambda\u8868\u8fbe\u5f0f\u4f53\uff08Lambda Expression Body\uff09<\/strong><br \/>\n  \u5b83\u5305\u542bLambda\u8868\u8fbe\u5f0f\u7684\u6267\u884c\u8bed\u53e5\u548c\u903b\u8f91\u3002<\/li>\n<\/ul>\n<p>&#8220;Journal Dev&#8221; \u7684\u7c7b\u578b\u662f java.lang.String\u3002&#8221;true&#8221; \u7684\u7c7b\u578b\u662f Boolean\u3002\u540c\u6837\u5730\uff0c\u4e00\u4e2a Lambda \u8868\u8fbe\u5f0f\u7684\u7c7b\u578b\u662f\u51fd\u6570\u5f0f\u63a5\u53e3\u3002\u4f8b\u5982\uff1a\u4e0b\u8ff0 Lambda \u8868\u8fbe\u5f0f\u7684\u7c7b\u578b\u662f\u4ec0\u4e48\uff1f<\/p>\n<pre class=\"post-pre\"><code>   () -> System.out.println(\"Hello World\");\r\n<\/code><\/pre>\n<p>\u8fd9\u4e2aLambda\u8868\u8fbe\u5f0f\u6ca1\u6709\u53c2\u6570\uff0c\u5e76\u4e14\u4e0d\u8fd4\u56de\u4efb\u4f55\u7ed3\u679c\u3002\u56e0\u6b64\u5b83\u7684\u7c7b\u578b\u662f&#8221;java.lang.Runnable&#8221;\u51fd\u6570\u5f0f\u63a5\u53e3\u3002<\/p>\n<h3>\u4ec0\u4e48\u662f\u51fd\u6570\u5f0f\u63a5\u53e3\uff1f\u4ec0\u4e48\u662fSAM\uff08\u5355\u4e00\u62bd\u8c61\u65b9\u6cd5\uff09\u63a5\u53e3\uff1f<\/h3>\n<p>\u4e00\u4e2a\u529f\u80fd\u63a5\u53e3\u662f\u4e00\u4e2a\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\u3002\u529f\u80fd\u63a5\u53e3\u4e5f\u88ab\u79f0\u4e3aSAM\u63a5\u53e3\uff0c\u56e0\u4e3a\u5b83\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u3002SAM\u63a5\u53e3\u4ee3\u8868\u5355\u4e00\u62bd\u8c61\u65b9\u6cd5\u63a5\u53e3\u3002Java SE 8 API\u5b9a\u4e49\u4e86\u8bb8\u591a\u529f\u80fd\u63a5\u53e3\u3002<\/p>\n<h3>\u6211\u4eec\u662f\u5426\u53ef\u4ee5\u5b9a\u4e49\u81ea\u5df1\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\uff1f@FunctionalInterface\u662f\u4ec0\u4e48\uff1f\u5b9a\u4e49\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u89c4\u5219\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>\u662f\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u81ea\u5df1\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\u3002@FunctionalInterface\u662fJava SE 8\u4e2d\u5f15\u5165\u7684\u4e00\u4e2a\u6ce8\u89e3\uff0c\u7528\u4e8e\u6307\u793a\u63a5\u53e3\u662f\u51fd\u6570\u5f0f\u63a5\u53e3\u3002\u5b9a\u4e49\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u89c4\u5219\u5305\u62ec\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u63a5\u53e3\u53ea\u80fd\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5<\/li>\n<li>\u53ef\u4ee5\u6709\u591a\u4e2a\u9ed8\u8ba4\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5<\/li>\n<li>\u53ef\u4ee5\u91cd\u5199Object\u7c7b\u4e2d\u7684\u65b9\u6cd5<\/li>\n<\/ul>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aJava SE 8\u9762\u8bd5\u95ee\u9898\u548c\u7b54\u6848\uff08\u90e8\u5206\u4e00\uff09\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51713\u90e8\u5206\uff09\u3002<\/p>\n<p>\u662f\u7684\uff0c\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u81ea\u5df1\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\u3002\u6211\u4eec\u4f7f\u7528Java SE 8\u7684@FunctionalInterface\u6ce8\u89e3\u6765\u6807\u8bb0\u4e00\u4e2a\u63a5\u53e3\u4f5c\u4e3a\u51fd\u6570\u5f0f\u63a5\u53e3\u3002\u6211\u4eec\u9700\u8981\u9075\u5faa\u4ee5\u4e0b\u89c4\u5219\u6765\u5b9a\u4e49\u4e00\u4e2a\u51fd\u6570\u5f0f\u63a5\u53e3\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u5b9a\u4e49\u4e00\u4e2a\u53ea\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\u3002<\/li>\n<li>\u6211\u4eec\u4e0d\u80fd\u5b9a\u4e49\u591a\u4e2a\u62bd\u8c61\u65b9\u6cd5\u3002<\/li>\n<li>\u5728\u63a5\u53e3\u5b9a\u4e49\u4e2d\u4f7f\u7528@FunctionalInterface\u6ce8\u89e3\u3002<\/li>\n<li>\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u4efb\u610f\u6570\u91cf\u7684\u5176\u4ed6\u65b9\u6cd5\uff0c\u5982\u9ed8\u8ba4\u65b9\u6cd5\u3001\u9759\u6001\u65b9\u6cd5\u3002<\/li>\n<li>\u5982\u679c\u6211\u4eec\u5c06java.lang.Object\u7c7b\u7684\u65b9\u6cd5\u91cd\u5199\u4e3a\u62bd\u8c61\u65b9\u6cd5\uff0c\u8fd9\u4e0d\u8ba1\u4e3a\u62bd\u8c61\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<h3>\u5728Java\u4e2d\uff0c\u662f\u5426\u9700\u8981\u4f7f\u7528@FunctionalInterface\u6ce8\u89e3\u6765\u5b9a\u4e49\u51fd\u6570\u5f0f\u63a5\u53e3\uff1f@FunctionalInterface\u6ce8\u89e3\u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f\u4e3a\u4ec0\u4e48\u6211\u4eec\u9700\u8981\u51fd\u6570\u5f0f\u63a5\u53e3\uff1f<\/h3>\n<p>\u5728Java\u4e2d\u4e0d\u662f\u5f3a\u5236\u4f7f\u7528@FunctionalInterface\u6ce8\u89e3\u6765\u5b9a\u4e49\u51fd\u6570\u5f0f\u63a5\u53e3\u3002\u5982\u679c\u4e0d\u60f3\u4f7f\u7528\uff0c\u6211\u4eec\u53ef\u4ee5\u7701\u7565\u8fd9\u4e2a\u6ce8\u89e3\u3002\u7136\u800c\uff0c\u5982\u679c\u5728\u51fd\u6570\u5f0f\u63a5\u53e3\u5b9a\u4e49\u4e2d\u4f7f\u7528\u4e86\u5b83\uff0cJava\u7f16\u8bd1\u5668\u4f1a\u5f3a\u5236\u5728\u8be5\u63a5\u53e3\u4e2d\u53ea\u4f7f\u7528\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u3002\u4e3a\u4ec0\u4e48\u6211\u4eec\u9700\u8981\u51fd\u6570\u5f0f\u63a5\u53e3\uff1f\u5728Java SE 8\u4e2d\uff0cLambda\u8868\u8fbe\u5f0f\u7684\u7c7b\u578b\u662f\u51fd\u6570\u5f0f\u63a5\u53e3\u3002\u65e0\u8bba\u6211\u4eec\u5728\u54ea\u91cc\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\uff0c\u5c31\u610f\u5473\u7740\u6211\u4eec\u6b63\u5728\u4f7f\u7528\u51fd\u6570\u5f0f\u63a5\u53e3\u3002<\/p>\n<h3>\u6211\u4eec\u4ec0\u4e48\u65f6\u5019\u5f00\u59cb\u4f7f\u7528Java 8 Stream API\uff1f\u4e3a\u4ec0\u4e48\u6211\u4eec\u9700\u8981\u5728\u6211\u4eec\u7684\u9879\u76ee\u4e2d\u4f7f\u7528Java 8 Stream API\uff1f<\/h3>\n<p>\u5f53\u6211\u4eec\u7684Java\u9879\u76ee\u9700\u8981\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\u65f6\uff0c\u6700\u597d\u4f7f\u7528Java 8 Stream API\u6765\u83b7\u5f97\u8bb8\u591a\u597d\u5904\u3002<\/p>\n<ul class=\"post-ul\">\n<li>\u5f53\u6211\u4eec\u60f3\u8981\u6267\u884c\u7c7b\u4f3c\u6570\u636e\u5e93\u7684\u64cd\u4f5c\u65f6\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u60f3\u8981\u6267\u884c\u5206\u7ec4\u64cd\u4f5c\u3001\u6392\u5e8f\u64cd\u4f5c\u7b49\u3002<\/li>\n<li>\u5f53\u6211\u4eec\u60f3\u8981\u5ef6\u8fdf\u6267\u884c\u64cd\u4f5c\u65f6\u3002<\/li>\n<li>\u5f53\u6211\u4eec\u60f3\u8981\u7f16\u5199\u51fd\u6570\u5f0f\u98ce\u683c\u7684\u7f16\u7a0b\u65f6\u3002<\/li>\n<li>\u5f53\u6211\u4eec\u60f3\u8981\u6267\u884c\u5e76\u884c\u64cd\u4f5c\u65f6\u3002<\/li>\n<li>\u5f53\u6211\u4eec\u60f3\u8981\u4f7f\u7528\u5185\u90e8\u8fed\u4ee3\u65f6\u3002<\/li>\n<li>\u5f53\u6211\u4eec\u60f3\u8981\u6267\u884c\u7ba1\u9053\u64cd\u4f5c\u65f6\u3002<\/li>\n<li>\u5f53\u6211\u4eec\u60f3\u8981\u83b7\u5f97\u66f4\u597d\u7684\u6027\u80fd\u65f6\u3002<\/li>\n<\/ul>\n<h3>\u89e3\u91ca Collection API \u548c Stream API \u4e4b\u95f4\u7684\u533a\u522b\u662f\u4ec0\u4e48\uff1f<\/h3>\n<div class=\"post-table\">\n<table>\n<thead>\n<tr>\n<th>\u5e8f\u53f7<\/th>\n<th>Collection API<\/th>\n<th>Stream API<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1.<\/td>\n<td>\u81eaJava 1.2\u7248\u672c\u8d77\u53ef\u7528<\/td>\n<td>\u5728Java SE 8\u4e2d\u5f15\u5165<\/td>\n<\/tr>\n<tr>\n<td>2.<\/td>\n<td>\u7528\u4e8e\u5b58\u50a8\u6570\u636e\uff08\u4e00\u7ec4\u5bf9\u8c61\uff09\u3002<\/td>\n<td>\u7528\u4e8e\u8ba1\u7b97\u6570\u636e\uff08\u5bf9\u4e00\u7ec4\u5bf9\u8c61\u8fdb\u884c\u8ba1\u7b97\uff09\u3002<\/td>\n<\/tr>\n<tr>\n<td>3.<\/td>\n<td>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Spliterator\u548cIterator\u6765\u8fed\u4ee3\u5143\u7d20\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528forEach\u4e3a\u6b64\u6d41\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u4e00\u4e2a\u64cd\u4f5c\u3002<\/td>\n<td>\u6211\u4eec\u4e0d\u80fd\u4f7f\u7528Spliterator\u6216Iterator\u6765\u8fed\u4ee3\u5143\u7d20\u3002<\/td>\n<\/tr>\n<tr>\n<td>4.<\/td>\n<td>\u7528\u4e8e\u5b58\u50a8\u65e0\u9650\u6570\u91cf\u7684\u5143\u7d20\u3002<\/td>\n<td>Stream API\u7528\u4e8e\u5904\u7406\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u3002<\/td>\n<\/tr>\n<tr>\n<td>5.<\/td>\n<td>\u901a\u5e38\uff0c\u5b83\u4f7f\u7528\u5916\u90e8\u8fed\u4ee3\u6982\u5ff5\u6765\u8fed\u4ee3\u5143\u7d20\uff0c\u5982Iterator\u3002<\/td>\n<td>Stream API\u4f7f\u7528\u5185\u90e8\u8fed\u4ee3\u6765\u8fed\u4ee3\u5143\u7d20\uff0c\u4f7f\u7528forEach\u65b9\u6cd5\u3002<\/td>\n<\/tr>\n<tr>\n<td>6.<\/td>\n<td>\u96c6\u5408\u5bf9\u8c61\u662f\u6025\u5207\u6784\u9020\u7684\u3002<\/td>\n<td>\u6d41\u5bf9\u8c61\u662f\u5ef6\u8fdf\u6784\u9020\u7684\u3002<\/td>\n<\/tr>\n<tr>\n<td>7.<\/td>\n<td>\u6211\u4eec\u53ea\u6709\u5728\u96c6\u5408\u5bf9\u8c61\u5b8c\u5168\u8ba1\u7b97\u540e\u624d\u80fd\u5411\u5176\u6dfb\u52a0\u5143\u7d20\u3002<\/td>\n<td>\u6211\u4eec\u53ef\u4ee5\u5728\u6ca1\u6709\u4efb\u4f55\u9884\u5148\u8ba1\u7b97\u7684\u60c5\u51b5\u4e0b\u5411\u6d41\u5bf9\u8c61\u6dfb\u52a0\u5143\u7d20\u3002\u8fd9\u610f\u5473\u7740\u6d41\u5bf9\u8c61\u662f\u6309\u9700\u8ba1\u7b97\u7684\u3002<\/td>\n<\/tr>\n<tr>\n<td>8.<\/td>\n<td>\u6211\u4eec\u53ef\u4ee5\u4efb\u610f\u6b21\u6570\u5730\u8fed\u4ee3\u548c\u6d88\u8017\u96c6\u5408\u5bf9\u8c61\u4e2d\u7684\u5143\u7d20\u3002<\/td>\n<td>\u6211\u4eec\u53ea\u80fd\u8fed\u4ee3\u548c\u6d88\u8017\u6d41\u5bf9\u8c61\u4e2d\u7684\u5143\u7d20\u4e00\u6b21\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>\u5728Java SE 8\u4e2d\uff0cSpliterator\u662f\u4ec0\u4e48\uff1f\u8fed\u4ee3\u5668\u548cSpliterator\u5728Java SE 8\u4e2d\u7684\u533a\u522b\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>Spliterator\u4ee3\u8868\u53ef\u5206\u5272\u8fed\u4ee3\u5668\u3002\u8fd9\u662f\u7531Oracle Corporation\u4f5c\u4e3aJava SE 8\u7684\u4e00\u90e8\u5206\u65b0\u5f15\u5165\u7684\u3002\u4e0eIterator\u548cListIterator\u4e00\u6837\uff0c\u5b83\u4e5f\u662fIterator\u63a5\u53e3\u4e2d\u7684\u4e00\u79cd\u3002<\/p>\n<div class=\"post-table\">\n<table>\n<thead>\n<tr>\n<th>\u5e8f\u53f7<\/th>\n<th>Spliterator<\/th>\n<th>Iterator<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1.<\/td>\n<td>\u5728Java SE 8\u4e2d\u5f15\u5165\u3002<\/td>\n<td>\u81eaJava 1.2\u7248\u672c\u8d77\u53ef\u7528\u3002<\/td>\n<\/tr>\n<tr>\n<td>2.<\/td>\n<td>\u53ef\u5206\u5272\u8fed\u4ee3\u5668<\/td>\n<td>\u4e0d\u53ef\u5206\u5272\u8fed\u4ee3\u5668<\/td>\n<\/tr>\n<tr>\n<td>3.<\/td>\n<td>\u7528\u4e8eStream API\u3002<\/td>\n<td>\u7528\u4e8eCollection API\u3002<\/td>\n<\/tr>\n<tr>\n<td>4.<\/td>\n<td>\u5b83\u4f7f\u7528\u5185\u90e8\u8fed\u4ee3\u6982\u5ff5\u6765\u8fed\u4ee3\u6d41\u3002<\/td>\n<td>\u5b83\u4f7f\u7528\u5916\u90e8\u8fed\u4ee3\u6982\u5ff5\u6765\u8fed\u4ee3\u96c6\u5408\u3002<\/td>\n<\/tr>\n<tr>\n<td>5.<\/td>\n<td>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528Spliterator\u4ee5\u5e76\u884c\u548c\u987a\u5e8f\u65b9\u5f0f\u8fed\u4ee3\u6d41\u3002<\/td>\n<td>\u6211\u4eec\u53ea\u80fd\u4f7f\u7528Iterator\u4ee5\u987a\u5e8f\u65b9\u5f0f\u8fed\u4ee3\u96c6\u5408\u3002<\/td>\n<\/tr>\n<tr>\n<td>6.<\/td>\n<td>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5728\u6d41\u5bf9\u8c61\u4e0a\u8c03\u7528spliterator()\u65b9\u6cd5\u83b7\u53d6Spliterator\u3002<\/td>\n<td>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5728\u96c6\u5408\u5bf9\u8c61\u4e0a\u8c03\u7528iterator()\u65b9\u6cd5\u83b7\u53d6Iterator\u3002<\/td>\n<\/tr>\n<tr>\n<td>7.<\/td>\n<td>\u91cd\u8981\u65b9\u6cd5\uff1atryAdvance()<\/td>\n<td>\u91cd\u8981\u65b9\u6cd5\uff1anext(), hasNext()<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<h3>\u5728Java 8\u4e2d\uff0cOptional\u662f\u4ec0\u4e48\uff1fOptional\u7684\u7528\u9014\u662f\u4ec0\u4e48\uff1fJava 8 Optional\u7684\u4f18\u52bf\u662f\u4ec0\u4e48\uff1f<\/h3>\n<p>Optional\uff08\u53ef\u9009\uff09\uff1aOptional\u662fJava SE 8\u4e2d\u5f15\u5165\u7684\u4e00\u4e2a\u6700\u7ec8\u7c7b\uff0c\u5b83\u5b9a\u4e49\u5728java.util\u5305\u4e2d\u3002\u5b83\u7528\u4e8e\u8868\u793a\u53ef\u9009\u5b58\u5728\u6216\u4e0d\u5b58\u5728\u7684\u503c\u3002\u5b83\u53ef\u4ee5\u5305\u542b\u4e00\u4e2a\u503c\u6216\u8005\u96f6\u4e2a\u503c\u3002\u5982\u679c\u5b83\u5305\u542b\u4e00\u4e2a\u503c\uff0c\u6211\u4eec\u53ef\u4ee5\u83b7\u53d6\u5b83\u3002\u5426\u5219\uff0c\u6211\u4eec\u83b7\u53d6\u5230\u7684\u662f\u7a7a\u503c\u3002\u5b83\u662f\u4e00\u4e2a\u6709\u754c\u7684\u96c6\u5408\uff0c\u5373\u5b83\u6700\u591a\u53ea\u80fd\u5305\u542b\u4e00\u4e2a\u5143\u7d20\u3002\u5b83\u662f&#8221;null&#8221;\u503c\u7684\u4e00\u4e2a\u66ff\u4ee3\u54c1\u3002Optional\u7684\u4e3b\u8981\u4f18\u52bf\u662f\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u7528\u4e8e\u907f\u514d\u7a7a\u503c\u68c0\u67e5\u3002<\/li>\n<li>\u7528\u4e8e\u907f\u514d&#8221;NullPointerException&#8221;\u3002<\/li>\n<\/ul>\n<h3>\u4ec0\u4e48\u662f\u7c7b\u578b\u63a8\u65ad\uff1f\u7c7b\u578b\u63a8\u65ad\u5728\u65e7\u7248\u672c\u7684Java 7\u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u53ef\u7528\u5417\uff1f\u8fd8\u662f\u4ec5\u5728Java SE 8\u4e2d\u53ef\u7528\uff1f<\/h3>\n<p>\u8fd9\u662f\u6587\u7ae0\u300aJava SE 8\u9762\u8bd5\u95ee\u9898\u548c\u7b54\u6848\uff08\u90e8\u5206\u4e00\uff09\u300b\u7684\u7b2c3\u90e8\u5206\uff08\u51713\u90e8\u5206\uff09\u3002<\/p>\n<p>\u7c7b\u578b\u63a8\u65ad\u662f\u6307\u5728\u7f16\u8bd1\u65f6\u7531\u7f16\u8bd1\u5668\u786e\u5b9a\u7c7b\u578b\u3002\u8fd9\u5728Java SE 8\u4e2d\u5e76\u4e0d\u662f\u4e00\u4e2a\u65b0\u529f\u80fd\uff0c\u5728Java 7\u4e2d\u4ee5\u53caJava 7\u4e4b\u524d\u4e5f\u53ef\u7528\u3002\u5728Java 7\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u6765\u63a2\u7d22Java\u6570\u7ec4\u3002\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u5982\u4e0b\u6240\u793a\u503c\u7684\u5b57\u7b26\u4e32\u6570\u7ec4\uff1a<\/p>\n<pre class=\"post-pre\"><code>String str[] = { \"Java 7\", \"Java 8\", \"Java 9\" };\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u5728\u53f3\u4fa7\u5206\u914d\u4e86\u4e00\u4e9b\u5b57\u7b26\u4e32\u503c\uff0c\u4f46\u6ca1\u6709\u5b9a\u4e49\u5176\u7c7b\u578b\u3002Java\u7f16\u8bd1\u5668\u4f1a\u81ea\u52a8\u63a8\u65ad\u5176\u7c7b\u578b\u5e76\u521b\u5efa\u4e00\u4e2a\u5b57\u7b26\u4e32\u6570\u7ec4\u3002Java 7\uff1aOracle\u516c\u53f8\u5728Java SE 7\u4e2d\u5f15\u5165\u4e86&#8221;\u94bb\u77f3\u64cd\u4f5c\u7b26&#8221;\u65b0\u529f\u80fd\uff0c\u4ee5\u907f\u514d\u5728\u6cdb\u578b\u4e2d\u8fdb\u884c\u4e0d\u5fc5\u8981\u7684\u7c7b\u578b\u5b9a\u4e49\u3002<\/p>\n<pre class=\"post-pre\"><code>Map&lt;String,List&lt;Customer&gt;&gt; customerInfoByCity = new 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[&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1478,183,180,744,1479],"class_list":{"0":"post-486","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-uncategorized","7":"tag-java-se-8","8":"tag-java","11":"tag-1479"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java SE 8\u9762\u8bd5\u9898\u4e0e\u7b54\u6848\u8be6\u89e3\uff08\u4e0a\u7bc7\uff09 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u672c\u6587\u6574\u7406\u4e86Java SE 8\u9762\u8bd5\u5e38\u89c1\u95ee\u9898\u53ca\u8be6\u7ec6\u7b54\u6848\uff0c\u5e2e\u52a9\u5f00\u53d1\u8005\u51c6\u5907\u6280\u672f\u9762\u8bd5\u3002\u6db5\u76d6Java 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