{"id":163,"date":"2016-02-01T17:12:25","date_gmt":"2016-02-01T17:12:25","guid":{"rendered":"http:\/\/kaizen-koka.com\/?p=163"},"modified":"2016-02-02T17:15:24","modified_gmt":"2016-02-02T17:15:24","slug":"java-interview-questions","status":"publish","type":"post","link":"https:\/\/kaizen-koka.com\/?p=163","title":{"rendered":"Java Interview Questions"},"content":{"rendered":"

\n\tDifferent ways to create an Object in java?<\/strong>
\n\t  1) using new 
\n\t      Netflix netflix = new Netflix();
\n\t  2) using class.forName()
\n\t      Netflix netflix =Class.forName("com.bellinfo.Netflix").newInstance();
\n\t  3) by clone()
\n\t      Netflix netflix1 = new Netflix();
\n\t      Netflix netflix2 = (Netflix) netflix1.clone();
\n\t  4) by desearlization (the object which is already Seralized)
\n\t      ObjectInputStream ooi = new ObjectInputStream(anInputStream);
\n\t      Netflix netflix = (Netflix) ooi.readObject();<\/span><\/span>\n<\/p>\n

\n\tCan we create an instance for a private constructor class out-side of the same class?<\/strong> 
\n\t  Yes, 
\n\t <\/span><\/span>\n<\/p>\n

\r\n class Netflix {\r\n     private Netflix(){}\r\n  }\r\n  public static void main(String args[]){\r\n       try {\r\n           Class c = Class.forName("com.bellinfo.corejava.Netflix");\r\n           Constructor con[] = c.getDeclaredConstructors();\r\n           con[0].setAccessible(true);\r\n           con[0].newInstance();\r\n       } catch (ClassNotFoundException e) {\r\n           e.printStackTrace();\r\n       } catch (InvocationTargetException e) {\r\n           e.printStackTrace();\r\n       } catch (InstantiationException e) {\r\n           e.printStackTrace();\r\n       } catch (IllegalAccessException e) {\r\n           e.printStackTrace();\r\n       }\r\n  }<\/pre>\n
\n\tDifference between instance vs object ?<\/span><\/span><\/strong>\n<\/p>\n
\n\t   <\/span><\/strong>A blueprint for a house design is like a class description. All the houses built from that blueprint are objects of that class. A given house is an instance. <\/span> An 'instance' is a variable in memory that only<\/em> has a memory address of an object in it.   <\/span>\n<\/p>\n
\n\tDifference between association vs aggregation vs composition ?<\/span><\/span><\/strong>\n<\/p>\n
\n\tis a vs has a relationship in java ?<\/span><\/span><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"
Different ways to create an Object in java?   1) using new        Netflix netflix = new Netflix();   2) using class.forName()       Netflix netflix =Class.forName("com.bellinfo.Netflix").newInstance(); […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false},"version":2}},"categories":[11,2],"tags":[],"class_list":["post-163","post","type-post","status-publish","format-standard","hentry","category-interview-questions","category-technology"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p70lnf-2D","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/kaizen-koka.com\/index.php?rest_route=\/wp\/v2\/posts\/163","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kaizen-koka.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kaizen-koka.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kaizen-koka.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kaizen-koka.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=163"}],"version-history":[{"count":2,"href":"https:\/\/kaizen-koka.com\/index.php?rest_route=\/wp\/v2\/posts\/163\/revisions"}],"predecessor-version":[{"id":172,"href":"https:\/\/kaizen-koka.com\/index.php?rest_route=\/wp\/v2\/posts\/163\/revisions\/172"}],"wp:attachment":[{"href":"https:\/\/kaizen-koka.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kaizen-koka.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kaizen-koka.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}