{"id":214606,"date":"2019-05-17T03:28:00","date_gmt":"2019-05-16T19:28:00","guid":{"rendered":"http:\/\/itteacheritfreelance.hk\/test\/wordpress\/?guid=d276246fb66f2184a74665bfbf212a1a"},"modified":"2019-05-17T03:28:00","modified_gmt":"2019-05-16T19:28:00","slug":"when-to-use-composition-vs-inheritance","status":"publish","type":"post","link":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/2019\/05\/17\/when-to-use-composition-vs-inheritance\/","title":{"rendered":"When to use composition vs inheritance"},"content":{"rendered":"<p>In <a href=\"https:\/\/www.javaworld.com\/article\/2987426\/java-101-inheritance-in-java-part-1.html\">Java 101: Inheritance in Java, Part 1<\/a>, you learned how to leverage inheritance for code reuse, by establishing <em>is-a <\/em>relationships between <a href=\"http:\/\/itteacheritfreelance.hk\/index.php\" title=\"\u672c\u7db1\u9801\u63d0\u4f9b\u4e00\u500b\u65b9\u4fbf\u7684\u5e73\u53f0, \u70ba\u5927\u5bb6\u914d\u5c0d\u96fb\u8166\u88dc\u7fd2,IT freelance, \u79c1\u4eba\u8001\u5e2b , PHP\u88dc\u7fd2, HTML\u88dc\u7fd2, CSS\u88dc\u7fd2, JavaScript\u88dc\u7fd2, XML, Java\u88dc\u7fd2,Server\u88dc\u7fd2, MySQL\u88dc\u7fd2, \u4e2d\u5b78\u96fb\u8166\u79d1\u79c1\u4eba\u88dc\u7fd2, \u5728\u8077\u4eba\u58eb\u96fb\u8166\u63d0\u5347\u88dc\u7fd2,\u5c08\u696d\u8003\u8a66\u96fb\u8166 \u88dc\u7fd2,\u96fb\u8166\u5716\u50cf\u8a2d\u8a08\u96fb\u8166\u88dc\u7fd2, gra\">class<\/a>es. Composition is a\u00a0closely related programming technique that is used to establish <em>has-a <\/em>relationships instead. Whereas <a href=\"https:\/\/www.javaworld.com\/article\/2987426\/java-101-inheritance-in-java-part-1.html\" rel=\"noopener\" >inheritance extends the features of one class to another<\/a>, composition allows us to compose one <a href=\"http:\/\/itteacheritfreelance.hk\/index.php\" title=\"\u672c\u7db1\u9801\u63d0\u4f9b\u4e00\u500b\u65b9\u4fbf\u7684\u5e73\u53f0, \u70ba\u5927\u5bb6\u914d\u5c0d\u96fb\u8166\u88dc\u7fd2,IT freelance, \u79c1\u4eba\u8001\u5e2b , PHP\u88dc\u7fd2, HTML\u88dc\u7fd2, CSS\u88dc\u7fd2, JavaScript\u88dc\u7fd2, XML, Java\u88dc\u7fd2,Server\u88dc\u7fd2, MySQL\u88dc\u7fd2, \u4e2d\u5b78\u96fb\u8166\u79d1\u79c1\u4eba\u88dc\u7fd2, \u5728\u8077\u4eba\u58eb\u96fb\u8166\u63d0\u5347\u88dc\u7fd2,\u5c08\u696d\u8003\u8a66\u96fb\u8166 \u88dc\u7fd2,\u96fb\u8166\u5716\u50cf\u8a2d\u8a08\u96fb\u8166\u88dc\u7fd2, gra\">class<\/a> from another <a href=\"http:\/\/itteacheritfreelance.hk\/index.php\" title=\"\u672c\u7db1\u9801\u63d0\u4f9b\u4e00\u500b\u65b9\u4fbf\u7684\u5e73\u53f0, \u70ba\u5927\u5bb6\u914d\u5c0d\u96fb\u8166\u88dc\u7fd2,IT freelance, \u79c1\u4eba\u8001\u5e2b , PHP\u88dc\u7fd2, HTML\u88dc\u7fd2, CSS\u88dc\u7fd2, JavaScript\u88dc\u7fd2, XML, Java\u88dc\u7fd2,Server\u88dc\u7fd2, MySQL\u88dc\u7fd2, \u4e2d\u5b78\u96fb\u8166\u79d1\u79c1\u4eba\u88dc\u7fd2, \u5728\u8077\u4eba\u58eb\u96fb\u8166\u63d0\u5347\u88dc\u7fd2,\u5c08\u696d\u8003\u8a66\u96fb\u8166 \u88dc\u7fd2,\u96fb\u8166\u5716\u50cf\u8a2d\u8a08\u96fb\u8166\u88dc\u7fd2, gra\">class<\/a>. The distinction is subtle at first, but it will make more sense once you see it in code.<\/p>\n<p class=\"jumpTag\"><a href=\"https:\/\/www.javaworld.com\/article\/2990828\/java-101-primer-composition-and-inheritance.html#jump\">To read this article in full, please click here<\/a><\/p>\n<\/section>\n<\/article>\n<p>(Insider Story)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Java 101: Inheritance in Java, Part 1, you learned how to leverage inheritance for code reuse, by establishing is-a relationships between classes. Composition is a\u00a0closely related programming technique that is used to establish has-a relationships i&#8230; <a href=\"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/2019\/05\/17\/when-to-use-composition-vs-inheritance\/\">\u95b1\u8b80\u5168\u6587 <span class=\"meta-nav\">&rarr;<\/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":[2,315,7,240],"tags":[398,402,397,414,413,410,409,407,408,406,399,400,394,375,558,556,557,560,559,555,561,566,553,554,565,563,564,562,183,567,568,10,401,396,403,412,411,395,405,404],"jetpack_publicize_connections":[],"aioseo_notices":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p7prtj-TPo","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/214606"}],"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=214606"}],"version-history":[{"count":1,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/214606\/revisions"}],"predecessor-version":[{"id":214607,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/posts\/214606\/revisions\/214607"}],"wp:attachment":[{"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/media?parent=214606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/categories?post=214606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itteacheritfreelance.hk\/test\/wordpress\/wp-json\/wp\/v2\/tags?post=214606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}