{"id":10563,"date":"2022-09-24T03:53:27","date_gmt":"2022-09-23T22:23:27","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-return-current-object-by-static-method\/"},"modified":"2022-09-24T03:53:27","modified_gmt":"2022-09-23T22:23:27","slug":"solved-how-to-return-current-object-by-static-method","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-return-current-object-by-static-method\/","title":{"rendered":"[Solved] How to return current object by static method?"},"content":{"rendered":"

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\n<\/p>\n

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You would use a Static Factory<\/strong><\/p>\n

public class Test{\n\n  private Test() {\n    \/\/Prevent construction by other classes, forcing the \n    \/\/ use of the factory\n  }\n\n  public static Test create(){\n    return new Test();\n  }\n\n  public static void main (String[] args){\n    Test ob = Test.create();\n  }\n}\n<\/code><\/pre>\n
I’ve made a few changes to your example to show that this way an instance can only be obtained via the factory.  This gives you control over how (and how many) instances are created.<\/p>\n
For instance, you can also make it such that the factory always returns the same instance (a singleton)<\/p>\n
private static Test instance;\npublic static Test create(){\n   synchronized (Test.class) {\n      if(instance == null)\n         instance = new Test();\n   }\n\n   return instance;\n}\n<\/code><\/pre>\n
This way the class Test<\/code> would only get created a single time.<\/p>\n
There are many other variations you can build into your factory method based on your specific requirements.<\/p>\n<\/p><\/div>\n
<\/div>\n<\/div>\n
            6<\/span> <\/p><\/div>\n<\/div>\n
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solved How to return current object by static method? <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] You would use a Static Factory public class Test{ private Test() { \/\/Prevent construction by other classes, forcing the \/\/ use of the factory } public static Test create(){ return new Test(); } public static void main (String[] args){ Test ob = Test.create(); } } I’ve made a few changes to your example to … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[323],"class_list":["post-10563","post","type-post","status-publish","format-standard","hentry","category-solved","tag-java"],"yoast_head":"\n[Solved] How to return current object by static method? - JassWeb<\/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:\/\/jassweb.com\/solved\/solved-how-to-return-current-object-by-static-method\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to return current object by static method? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] You would use a Static Factory public class Test{ private Test() { \/\/Prevent construction by other classes, forcing the \/\/ use of the factory } public static Test create(){ return new Test(); } public static void main (String[] args){ Test ob = Test.create(); } } I’ve made a few changes to your example to ... 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