{"id":31549,"date":"2023-04-01T19:49:44","date_gmt":"2024-02-14T19:38:01","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84lambda%e8%a1%a8%e8%be%be%e5%bc%8f-3\/"},"modified":"2024-04-29T21:30:46","modified_gmt":"2024-04-29T13:30:46","slug":"java%e7%9a%84lambda%e8%a1%a8%e8%be%be%e5%bc%8f-3","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84lambda%e8%a1%a8%e8%be%be%e5%bc%8f-3\/","title":{"rendered":"Java\u7684Lambda\u8868\u8fbe\u5f0f"},"content":{"rendered":"

Lambda\u5f0f\u662f\u4ec0\u4e48\uff1f<\/h2>\n

\u8fd9\u662f\u5728Java8\u4e2d\u5f15\u5165\u7684\u4e00\u79cd\u5199\u6cd5\u3002
\n\u540c\u6837\uff0c\u5728Java8\u4e2d\u5f15\u5165\u7684Stream API\u662f\u57fa\u4e8e\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u7684\uff0c\u56e0\u6b64\u5b66\u4e60Lambda\u8868\u8fbe\u5f0f\u53ef\u80fd\u4f1a\u6709\u4e00\u4e9b\u597d\u5904\u3002<\/p>\n

\u53e6\u5916\uff0c\u4f7f\u7528lambda\u8868\u8fbe\u5f0f\u8fd8\u5b58\u5728\u4e00\u4e2a\u597d\u5904\uff0c\u5373\u53ef\u4ee5\u7b80\u6d01\u5730\u63cf\u8ff0\u4f7f\u7528\u533f\u540d\u7c7b\u7684\u51fd\u6570\u5f0f\u63a5\u53e3\u3002<\/p>\n

\u5982\u4f55\u7f16\u5199lambda\u8868\u8fbe\u5f0f<\/h3>\n

Lambda\u8868\u8fbe\u5f0f\u7684\u57fa\u672c\u4e66\u5199\u65b9\u5f0f\u5982\u4e0b\u3002<\/p>\n

\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u540d\u3000\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540d = \u5f15\u6570\uff08\u8907\u6570\u53d7\u3051\u53d6\u308c\u308b\uff09 -> \u51e6\u7406;\r\n<\/code><\/pre>\n
\u7531\u4e8e\u7f16\u8bd1\u5668\u53ef\u4ee5\u8fdb\u884c\u7c7b\u578b\u63a8\u65ad\uff0c\u6240\u4ee5\u4e0d\u9700\u8981\u6307\u5b9a\u53c2\u6570\u7684\u7c7b\u578b\u3002
\n\u5f53\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u65f6\uff0c\u4e0d\u9700\u8981\u4f7f\u7528return\u6216\u7528\u62ec\u53f7()\u62ec\u4f4f\u53c2\u6570\uff0c\u4e5f\u4e0d\u9700\u8981\u4e66\u5199\u4ee3\u7801\u5757{}\u3002
\n\u203b\u4fee\u6b63
\n\u53ea\u6709\u5f53{}\u4e2d\u53ea\u6709\u4e00\u6761return\u8bed\u53e5\u65f6\uff0c\u624d\u53ef\u4ee5\u7701\u7565{}\u548creturn\u3002
\n\u53c2\u6570\u7684\u6570\u91cf\u4e0d\u91cd\u8981\u3002<\/p>\n
\u4f7f\u7528\u533f\u540d\u7c7b\u8fdb\u884c\u5b9e\u73b0<\/h3>\n
\u901a\u8fc7\u4f7f\u7528lambda\u8868\u8fbe\u5f0f\uff0c\u53ef\u4ee5\u7b80\u6d01\u660e\u4e86\u5730\u7f16\u5199\u4ee3\u7801\uff0c\u800c\u65e0\u9700\u4f7f\u7528\u533f\u540d\u7c7b\u3002<\/p>\n
\u5047\u8bbe\u6709\u4e00\u4e2a\u7c7b\u4f3c\u4ee5\u4e0b\u7684\u533f\u540d\u7c7b\u3002<\/p>\n
\r\ninterface<\/span> InterfaceTest<\/span>{<\/span>\r\n    \/\/ \u62bd\u8c61\u30e1\u30bd\u30c3\u30c9<\/span>\r\n    public<\/span> String<\/span> name<\/span>(<\/span>String<\/span> name<\/span>);<\/span>\r\n}<\/span>\r\n\r\npublic<\/span> class<\/span> Main<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\r\n        \/\/ \u533f\u540d\u30af\u30e9\u30b9\u3092\u4f7f\u3063\u305f\u66f8\u304d\u65b9<\/span>\r\n        InterfaceTest<\/span> greeting<\/span> =<\/span> new<\/span> InterfaceTest<\/span>()<\/span> {<\/span>\r\n            \/\/ \u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9<\/span>\r\n            public<\/span> String<\/span> name<\/span>(<\/span>String<\/span> name<\/span>)<\/span> {<\/span>\r\n                return<\/span> \"Hello \"<\/span> +<\/span> name<\/span>;<\/span>\r\n            }<\/span>\r\n        };<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>greeting<\/span>.<\/span>name<\/span>(<\/span>\"momoji\"<\/span>));<\/span>\r\n    }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u4e2d\uff0c\u770b\u8d77\u6765\u597d\u50cf\u662f\u5728\u521b\u5efa\u63a5\u53e3\u7684\u5b9e\u4f8b\uff0c\u4f46\u5b9e\u9645\u4e0a\u662f\u5728\u521b\u5efa\u4e00\u4e2a\u5177\u6709\u533f\u540d\u7c7b\u7684\u5b9e\u4f8b\uff0c\u8be5\u533f\u540d\u7c7b\u62e5\u6709\u8be5\u63a5\u53e3\u3002<\/p>\n
\u7ed3\u679c\u5982\u4e0b \u2193<\/p>\n
Hello momoji\r\n<\/code><\/pre>\n
\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u8fdb\u884c\u5b9e\u73b0\u3002<\/h3>\n
\u6211\u4f1a\u5c1d\u8bd5\u7528Lambda\u8868\u8fbe\u5f0f\u6765\u91cd\u65b0\u6539\u5199\u8fd9\u4e2a\u3002<\/p>\n
interface<\/span> InterfaceTest<\/span>{<\/span>\r\n    \/\/ \u62bd\u8c61\u30e1\u30bd\u30c3\u30c9<\/span>\r\n    public<\/span> String<\/span> name<\/span>(<\/span>String<\/span> name<\/span>);<\/span>\r\n}<\/span>\r\n\r\npublic<\/span> class<\/span> Main<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\r\n        \/\/ \u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u3063\u305f\u66f8\u304d\u65b9<\/span>\r\n        InterfaceTest<\/span> greeting<\/span> =<\/span> (<\/span>name<\/span>)<\/span> -><\/span> {<\/span>\r\n            return<\/span> \"Hello \"<\/span> +<\/span> name<\/span>;<\/span>\r\n        };<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>greeting<\/span>.<\/span>name<\/span>(<\/span>\"momoji\"<\/span>));<\/span>\r\n    }<\/span>\r\n\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u5728{}\u4e2d\uff0c\u5199\u4e0b\u4e86\u901a\u8fc7greeting\u65b9\u6cd5\u6267\u884c\u7684\u5904\u7406\u5185\u5bb9\u3002
\n\u53d8\u5f97\u66f4\u7b80\u77ed\uff0c\u66f4\u6613\u4e8e\u7406\u89e3\u6b63\u5728\u8fdb\u884c\u4ec0\u4e48\u64cd\u4f5c\u3002\u540c\u65f6\uff0c\u4e0d\u518d\u9700\u8981\u6307\u5b9a\u53c2\u6570\u7684\u7c7b\u578b\u3002<\/p>\n
\u6267\u884c\u7ed3\u679c\u2193<\/p>\n
Hello momoji\r\n<\/code><\/pre>\n
\u4f7f\u7528lambda\u8868\u8fbe\u5f0f\u4ee5\u66f4\u7b80\u6d01\u7684\u65b9\u5f0f\u7f16\u5199forEach\u5faa\u73af<\/h2>\n
\u5728Java\u4e2d\uff0c\u6709\u4e00\u79cd\u4e0efor-each\u5faa\u73af\u5177\u6709\u76f8\u540c\u6027\u8d28\u7684\u7ed3\u6784\uff0c\u79f0\u4e3a\u589e\u5f3a\u578bfor\u5faa\u73af\u3002\u5b83\u5177\u6709\u5bf9\u6570\u7ec4\u6216\u5217\u8868\u7684\u6240\u6709\u5143\u7d20\u6267\u884c\u6307\u5b9a\u64cd\u4f5c\u7684\u6027\u8d28\u3002<\/p>\n
for\u5faa\u73af\u7684\u5199\u6cd5\u3002<\/p>\n
for (\u30c7\u30fc\u30bf\u578b \u5909\u6570\u540d: list\u3084\u914d\u5217){\r\n  \u51e6\u7406;\r\n  ...\r\n}\r\n<\/code><\/pre>\n
\u8981\u8f93\u51fa\u5217\u8868\u7684\u6240\u6709\u5143\u7d20\uff0c\u8bf7\u4f7f\u7528\u6269\u5c55for\u5faa\u73af\uff0c\u5199\u6210\u4ee5\u4e0b\u65b9\u5f0f\u3002<\/p>\n
main<\/span>.<\/span>java<\/span>\r\nclass<\/span> Main<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span> (<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\r\n            List<\/span><<\/span>String<\/span>><\/span> list<\/span> =<\/span> new<\/span> ArrayList<\/span><>();<\/span>\r\n            list<\/span>.<\/span>add<\/span>(<\/span>\"a\"<\/span>);<\/span>\r\n            list<\/span>.<\/span>add<\/span>(<\/span>\"b\"<\/span>);<\/span>\r\n            list<\/span>.<\/span>add<\/span>(<\/span>\"c\"<\/span>);<\/span>\r\n\r\n            \/\/ \u62e1\u5f35for\u6587<\/span>\r\n            for<\/span>(<\/span>String<\/span> l<\/span> :<\/span> list<\/span>)<\/span> {<\/span>\r\n                System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>l<\/span>);<\/span>\r\n            }<\/span>\r\n\r\n        }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c
\n1. \u5b9a\u4e49\u4e00\u4e2aString\u7c7b\u578b\u7684\u5217\u8868”list”\u3002
\n2. \u4f7f\u7528add\u65b9\u6cd5\u5c06”a”\u3001”b”\u3001”c”\u7684\u5143\u7d20\u9010\u4e2a\u6dfb\u52a0\u5230list\u4e2d\u3002
\n3. \u4f7f\u7528\u589e\u5f3afor\u5faa\u73af\u9010\u4e2a\u8f93\u51falist\u7684\u5143\u7d20\u3002<\/p>\n
\u6211\u6b63\u5728\u505a\u7684\u4e8b\u60c5\u662f\u8fd9\u6837\u7684\u3002<\/p>\n
\u6267\u884c\u7ed3\u679c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
a\r\nb\r\nc\r\n<\/code><\/pre>\n
\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u548cforEach\u8bed\u53e5\u53ef\u4ee5\u5c06\u5176\u7f29\u77ed\u3002<\/p>\n
class<\/span> Main<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span> (<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\r\n            List<\/span><<\/span>String<\/span>><\/span> list<\/span> =<\/span> new<\/span> ArrayList<\/span><>();<\/span>\r\n            list<\/span>.<\/span>add<\/span>(<\/span>\"a\"<\/span>);<\/span>\r\n            list<\/span>.<\/span>add<\/span>(<\/span>\"b\"<\/span>);<\/span>\r\n            list<\/span>.<\/span>add<\/span>(<\/span>\"c\"<\/span>);<\/span>\r\n\r\n            \/\/ \u62e1\u5f35for\u6587<\/span>\r\n            \/\/ for(String l : list) {<\/span>\r\n            \/\/  System.out.println(l);<\/span>\r\n            \/\/ }<\/span>\r\n\r\n            \/\/ \u30e9\u30e0\u30c0\u5f0f\u3092\u4f7f\u3063\u305fforEach\u6587<\/span>\r\n            list<\/span>.<\/span>forEach<\/span>(<\/span>l<\/span> -><\/span> System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>l<\/span>));<\/span>\r\n\r\n        }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u6267\u884c\u7ed3\u679c\u2193<\/p>\n
a\r\nb\r\nc\r\n<\/code><\/pre>\n
\u4f7f\u7528\u65b9\u6cd5\u5f15\u7528\uff0c\u53ef\u4ee5\u5c06\u539f\u672c\u9700\u89813\u884c\u5199\u7684\u5185\u5bb9\u538b\u7f29\u52301\u884c\u3002<\/p>\n
\u65b9\u6cd5\u5f15\u7528\u662f\u6307\u5bf9\u65b9\u6cd5\u7684\u5f15\u7528\u6216\u6307\u5411\u3002<\/h2>\n
\u4eceJava8\u5f00\u59cb\uff0c\u4e5f\u5f15\u5165\u4e86\u8fd9\u79cd\u8bed\u6cd5\u3002<\/p>\n
\u65b9\u6cd5\u5f15\u7528\u662f\u6307\u53ef\u4ee5\u5c06\u65b9\u6cd5\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7684\u673a\u5236\u3002<\/p>\n
\u60a8\u53ef\u4ee5\u65e0\u9700\u53c2\u6570\u8c03\u7528\u9884\u5b9a\u4e49\u7684\u65b9\u6cd5\u3002<\/p>\n
\u65b9\u6cd5\u5f15\u7528\u7684\u5199\u6cd5\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
\u30af\u30e9\u30b9\u540d :: \u30e1\u30bd\u30c3\u30c9\u540d\r\n<\/code><\/pre>\n
\u5728\u7c7b\u540d\u540e\u9762\u52a0\u4e0a”::”\uff0c\u5199\u4e0a\u60f3\u8981\u8c03\u7528\u7684\u65b9\u6cd5\u540d\u3002\u65b9\u6cd5\u540d\u4e0d\u9700\u8981\u52a0\u4e0a()\u3002<\/p>\n
\u6211\u5011\u7acb\u5373\u5617\u8a66\u5c07lambda\u8868\u9054\u5f0f\u8207\u5176\u7d50\u5408\u8d77\u4f86\u3002<\/p>\n
\/\/ \u30e1\u30bd\u30c3\u30c9\u53c2\u7167\u3092\u4f7f\u3063\u305f\u30e9\u30e0\u30c0\u5f0f<\/span>\r\nlist<\/span>.<\/span>forEach<\/span>(<\/span>System<\/span>.<\/span>out<\/span>::<\/span>println<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u7ed3\u679c\u2193<\/p>\n
a\r\nb\r\nc\r\n<\/code><\/pre>\n
\u4f7f\u7528Lambda\u8868\u8fbe\u5f0f\u548c\u65b9\u6cd5\u5f15\u7528\u7684\u7ec4\u5408\u6280\u672f\uff0c\u4f7f\u5f97\u4ee3\u7801\u80fd\u591f\u66f4\u7b80\u6d01\u5730\u7f16\u5199\u3002<\/p>\n
\u8fd9\u662f\u4e00\u4e2a\u7528\u4e8e\u5904\u7406\u6570\u7ec4\u3001\u5217\u8868\u548c\u5176\u4ed6\u96c6\u5408\u7684 API\uff0c\u53ef\u4ee5\u4f7f\u7528\u6613\u4e8e\u7406\u89e3\u7684\u4ee3\u7801\u6765\u5b9e\u73b0\u503c\u7684\u805a\u5408\u548c\u57fa\u4e8e\u6570\u636e\u7684\u5904\u7406\u3002<\/div>\n","protected":false},"excerpt":{"rendered":"
Lambda\u5f0f\u662f\u4ec0\u4e48\uff1f \u8fd9\u662f\u5728Java8\u4e2d\u5f15\u5165\u7684\u4e00\u79cd\u5199\u6cd5\u3002 \u540c\u6837\uff0c\u5728Java8\u4e2d\u5f15\u5165\u7684Stream API\u662f\u57fa […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31549","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nJava\u7684Lambda\u8868\u8fbe\u5f0f - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/java\u7684lambda\u8868\u8fbe\u5f0f-3\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u7684Lambda\u8868\u8fbe\u5f0f\" \/>\n<meta property=\"og:description\" content=\"Lambda\u5f0f\u662f\u4ec0\u4e48\uff1f \u8fd9\u662f\u5728Java8\u4e2d\u5f15\u5165\u7684\u4e00\u79cd\u5199\u6cd5\u3002 \u540c\u6837\uff0c\u5728Java8\u4e2d\u5f15\u5165\u7684Stream API\u662f\u57fa […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/java\u7684lambda\u8868\u8fbe\u5f0f-3\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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