{"id":142322,"date":"2024-05-22T11:01:24","date_gmt":"2024-05-22T05:31:24","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=142322"},"modified":"2024-05-22T11:01:24","modified_gmt":"2024-05-22T05:31:24","slug":"lambda-expression-and-functional-interface-in-java","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/lambda-expression-and-functional-interface-in-java\/","title":{"rendered":"Lambda Expression and Functional Interface in Java"},"content":{"rendered":"<h3>Program 1<\/h3>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">import java.util.*;\r\n@FunctionalInterface\r\ninterface MyInter\r\n{\r\n       public int mySquare(int n);  \r\n}\r\n\r\nclass TestLambda \r\n{\r\n    public static void main(String args[])\r\n    {\r\n          MyInter M1=(n)-&gt;{return(n*n);};\r\n          Scanner scan=new Scanner(System.in);\r\n           int m,x;\r\n           System.out.println(\"Enter a number\");\r\n           m=scan.nextInt();\r\n           x=M1.mySquare(m);\r\n           System.out.println(\"Square of number is \"+x);\r\n    }\r\n}\r\n\r\n\/\/ @FunctionalInterface\r\n\/\/ interface MyInter\r\n\/\/ {\r\n\/\/        public int factorial(int n);  \r\n\/\/ }\r\n\r\n\/\/ class TestLambda \r\n\/\/ {\r\n\/\/     public static void main(String args[])\r\n\/\/     {\r\n\/\/            MyInter M1=(n)-&gt;{\r\n\/\/                          int f=1;\r\n\/\/                          while(n!=0)\r\n\/\/                          {\r\n\/\/                             f=f*n;\r\n\/\/                             n--;\r\n\/\/                          }\r\n\/\/                 return(f); \r\n\/\/            };\r\n\/\/          Scanner scan=new Scanner(System.in);\r\n\/\/            int m,x;\r\n\/\/          System.out.println(\"Enter a number\");\r\n\/\/          m=scan.nextInt();\r\n\/\/          x=M1.factorial(m);\r\n\/\/          System.out.println(\"Factorial is \"+x);\r\n\/\/     }\r\n\/\/}\r\n\r\n\r\n\/\/ @FunctionalInterface\r\n\/\/ interface MyInter\r\n\/\/ {\r\n\/\/        public void add(int a,int b);   \r\n\/\/ }\r\n\r\n\/\/ class TestLambda \r\n\/\/ {\r\n\/\/     public static void main(String args[])\r\n\/\/     {\r\n\/\/            MyInter M1=(a,b)-&gt;{System.out.println(a+b);};\r\n\/\/             M1.add(50,10);\r\n\/\/            M1.add(100,20);\r\n\/\/            M1.add(150,20);\r\n\/\/            M1.add(500,40);\r\n\/\/            M1.add(90,10);\r\n\r\n\/\/     }\r\n\/\/ }\r\n\r\n\r\n\/\/ @FunctionalInterface\r\n\/\/ interface MyInter\r\n\/\/ {\r\n\/\/        public void a1();   \r\n\/\/ }\r\n\r\n\/\/ class TestLambda \r\n\/\/ {\r\n\/\/     public static void main(String args[])\r\n\/\/     {\r\n\/\/             MyInter M1=()-&gt;{System.out.println(\"Hello Friends How Are You This is lambda expression\");};\r\n\/\/             M1.a1();\r\n\/\/     }\r\n\/\/ }<\/pre>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Program 1 import java.util.*; @FunctionalInterface interface MyInter { public int mySquare(int n); } class TestLambda { public static void main(String args[]) { MyInter M1=(n)-&gt;{return(n*n);}; Scanner scan=new Scanner(System.in); int m,x; System.out.println(&#8220;Enter a number&#8221;); m=scan.nextInt(); x=M1.mySquare(m);&#46;&#46;&#46;<\/p>\n","protected":false},"author":86671,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[32214,7345,32215,7572,32212,29859,29858,32216,32211,32213],"class_list":["post-142322","post","type-post","status-publish","format-standard","hentry","category-java","tag-functional-interface-in-java","tag-java","tag-java-functional-interface","tag-java-lambda-expression","tag-java-lambda-expression-and-functional-interface","tag-java-practical","tag-java-program","tag-java-program-on-lambda-expression-and-functional-interface","tag-lambda-expression-and-functional-interface-in-java","tag-lambda-expression-in-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Lambda Expression and Functional Interface in Java - DataFlair<\/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:\/\/data-flair.training\/blogs\/lambda-expression-and-functional-interface-in-java\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lambda Expression and Functional Interface in Java - DataFlair\" \/>\n<meta property=\"og:description\" content=\"Program 1 import java.util.*; @FunctionalInterface interface MyInter { public int mySquare(int n); } class TestLambda { public static void main(String args[]) { MyInter M1=(n)-&gt;{return(n*n);}; Scanner scan=new Scanner(System.in); int m,x; System.out.println(&quot;Enter a number&quot;); m=scan.nextInt(); x=M1.mySquare(m);&#046;&#046;&#046;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/data-flair.training\/blogs\/lambda-expression-and-functional-interface-in-java\/\" \/>\n<meta property=\"og:site_name\" content=\"DataFlair\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/DataFlairWS\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-05-22T05:31:24+00:00\" \/>\n<meta name=\"author\" content=\"TechVidvan Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@DataFlairWS\" \/>\n<meta name=\"twitter:site\" content=\"@DataFlairWS\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"TechVidvan Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Lambda Expression and Functional Interface in Java - DataFlair","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/data-flair.training\/blogs\/lambda-expression-and-functional-interface-in-java\/","og_locale":"en_US","og_type":"article","og_title":"Lambda Expression and Functional Interface in Java - DataFlair","og_description":"Program 1 import java.util.*; 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