{"id":5990,"date":"2022-08-31T20:24:22","date_gmt":"2022-08-31T14:54:22","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-the-object-class-is-the-parent-class-of-all-the-classes-in-java-by-default\/"},"modified":"2022-08-31T20:24:22","modified_gmt":"2022-08-31T14:54:22","slug":"solved-the-object-class-is-the-parent-class-of-all-the-classes-in-java-by-default","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-the-object-class-is-the-parent-class-of-all-the-classes-in-java-by-default\/","title":{"rendered":"[Solved] The Object class is the parent class of all the classes in java by default"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-40877115\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"40877115\" data-parentid=\"40877048\" data-score=\"0\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Basically, you are confused between reference type and instance (object) type.<\/p>\n<p>In your program, <code>o<\/code> is the reference variable with type <code>Object<\/code>, so <code>o<\/code> will be able to access only the methods and variables from <code>Object<\/code> class.<br \/>\nAlso, <code>t<\/code> is the reference variable with type <code>test2<\/code>, so <code>t<\/code> can access class members of <code>test2<\/code>. You can look here for more details.<\/p>\n<p>In short, reference type decides which members of the class you can access.<\/p>\n<p>Also, look at the below popular classes for Inheritance to understand the above concept:<\/p>\n<pre><code>public class Animal {\n   public String foodtype;\n   \/\/other members\n}\n\npublic class Dog extends Animal {\n   public String name;\n   \/\/other members\n}\n\npublic class Test {\n\n   public static void main(String[] args) {\n        Animal a = new Dog();\/\/'a' can access Anmial class members only\n        a.foodtype = \"meat\"; \/\/ok\n        a.name = \"puppy\"; \/\/compiler error\n\n        Dog d = new Dog();\/\/'d' can access both Animal and Dog class members\n        d.foodtype = \"meat\"; \/\/ok\n        d.name = \"puppy\";\/\/ok\n   }\n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\"><\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved The Object class is the parent class of all the classes in java by default <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Basically, you are confused between reference type and instance (object) type. In your program, o is the reference variable with type Object, so o will be able to access only the methods and variables from Object class. Also, t is the reference variable with type test2, so t can access class members of test2. &#8230; <a title=\"[Solved] The Object class is the parent class of all the classes in java by default\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-the-object-class-is-the-parent-class-of-all-the-classes-in-java-by-default\/\" aria-label=\"More on [Solved] The Object class is the parent class of all the classes in java by default\">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-5990","post","type-post","status-publish","format-standard","hentry","category-solved","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] The Object class is the parent class of all the classes in java by default - 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-the-object-class-is-the-parent-class-of-all-the-classes-in-java-by-default\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] The Object class is the parent class of all the classes in java by default - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Basically, you are confused between reference type and instance (object) type. 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