{"id":133958,"date":"2019-05-08T04:13:00","date_gmt":"2019-05-07T20:13:00","guid":{"rendered":"http:\/\/itteacheritfreelance.hk\/test\/wordpress\/?guid=cec1eeaf65055b9ebb014ea2fafe92da"},"modified":"2019-05-08T04:13:00","modified_gmt":"2019-05-07T20:13:00","slug":"java-101-inheritance-in-java-part-1-the-extends-keyword","status":"publish","type":"post","link":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/2019\/05\/08\/java-101-inheritance-in-java-part-1-the-extends-keyword\/","title":{"rendered":"Java 101: Inheritance in Java, Part 1: The extends keyword"},"content":{"rendered":"
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Java supports class<\/a> reuse through inheritance and composition. This two-part tutorial teaches you how to use inheritance in your Java programs. In Part 1 you’ll learn how to use the extends<\/code> keyword to derive a child class<\/a> from a parent class<\/a>, invoke parent class<\/a> constructor<\/a>s and methods, and override methods. In\u00a0Part 2<\/a> you’ll tour java.lang.Object<\/code>, which is Java’s superclass<\/a> from which every other class<\/a> inherits.<\/p>\n

To complete your learning about inheritance, be sure to check out the Java 101 composition and inheritance<\/strong><\/a> primer. You’ll learn why composition is an important complement to inheritance, and how to use it to guard against issues with encapsulation in your Java programs.<\/p>\n

To read this article in full, please click here<\/a><\/p>\n<\/section>\n<\/article>\n","protected":false},"excerpt":{"rendered":"

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Java supports class reuse through inheritance and composition. This two-part tutorial teaches you how to use inheritance in your Java programs. In Part 1 you’ll learn how to use the extends<\/code> keyword to derive a child class from a parent class, invoke parent class constructors and methods, and override methods. In Part 2<\/a> you’ll tour java.lang.Object<\/code>, which is Java’s superclass from which every other class inherits.<\/p>\n

To complete your learning about inheritance, be sure to check out the Java 101 composition and inheritance<\/strong><\/a> primer. You’ll learn why composition is an important complement to inheritance, and how to use it to guard against issues with encapsulation in your Java programs.<\/p>\n

To read this article in full, please click here<\/a><\/p>\n<\/section>\n<\/article>\n

\u95b1\u8b80\u5168\u6587 →<\/span><\/a><\/p>\n","protected":false},"author":123,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"slim_seo":[],"_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}}},"categories":[12,2,315,240],"tags":[398,402,397,414,413,528,410,409,407,408,406,399,400,394,318,526,375,523,183,184,529,524,232,10,401,396,381,403,412,411,395,405,404,525,457,530,363,384,321,320,319,316,26,527,317],"jetpack_publicize_connections":[],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p7prtj-yQC","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/133958"}],"collection":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/users\/123"}],"replies":[{"embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/comments?post=133958"}],"version-history":[{"count":2,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/133958\/revisions"}],"predecessor-version":[{"id":135798,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/133958\/revisions\/135798"}],"wp:attachment":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/media?parent=133958"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/categories?post=133958"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/tags?post=133958"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}