{"id":10505,"date":"2015-08-29T09:35:12","date_gmt":"2015-08-29T13:35:12","guid":{"rendered":"http:\/\/bangla.salearningschool.com\/?p=10505"},"modified":"2015-08-24T10:32:40","modified_gmt":"2015-08-24T14:32:40","slug":"tests-the-class-type-of-an-object-using-the-isinstance-method-preferred-over-instanceof-operator","status":"publish","type":"post","link":"http:\/\/bangla.sitestree.com\/?p=10505","title":{"rendered":"Tests the class type of an object using the isInstance method (preferred over instanceof operator)."},"content":{"rendered":"<pre>\/** Taken from Core Web Programming from\r\n\u00a0*\u00a0 Prentice Hall and Sun Microsystems Press,\r\n\u00a0*\u00a0 .\r\n\u00a0*\u00a0 \u00a9 2001 Marty Hall and Larry Brown;\r\n\u00a0*\u00a0 may be freely used or adapted.\r\n\u00a0*\/\r\n\r\ninterface Barking {}\r\n\r\nclass Mammal {}\r\n\r\nclass Canine extends Mammal {}\r\n\r\nclass Dog extends Canine implements Barking {}\r\n\r\nclass Retriever extends Dog {}\r\n\r\npublic class InstanceOf {\r\n\u00a0 public static void main(String[] args) {\r\n\u00a0\u00a0\u00a0 Canine wolf = new Canine();\r\n\u00a0\u00a0\u00a0 Retriever rover = new Retriever();\r\n\r\n\u00a0\u00a0\u00a0 System.out.println(\"Testing instanceof:\");\r\n\u00a0\u00a0\u00a0 report(wolf, \"wolf\");\r\n\u00a0\u00a0\u00a0 System.out.println();\r\n\u00a0\u00a0\u00a0 report(rover, \"rover\");\r\n\r\n\u00a0\u00a0\u00a0 System.out.println(\"\\nTesting isInstance:\");\r\n\u00a0\u00a0\u00a0 Class barkingClass = Barking.class;\r\n\u00a0\u00a0\u00a0 Class dogClass = Dog.class;\r\n\u00a0\u00a0\u00a0 Class retrieverClass = Retriever.class;\r\n\u00a0\u00a0\u00a0 System.out.println(\"\u00a0 Does a retriever bark? \" +\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 barkingClass.isInstance(rover));\r\n\u00a0\u00a0\u00a0 System.out.println(\"\u00a0 Is a retriever a dog? \" +\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 dogClass.isInstance(rover));\r\n\u00a0\u00a0\u00a0 System.out.println(\"\u00a0 Is a dog necessarily a retriever? \" +\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 retrieverClass.isInstance(new Dog()));\r\n\u00a0 }\r\n\r\n\u00a0 public static void report(Object object, String name) {\r\n\u00a0\u00a0\u00a0 System.out.println(\"\u00a0 \" + name + \" is a mammal: \" +\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (object instanceof Mammal));\r\n\u00a0\u00a0\u00a0 System.out.println(\"\u00a0 \" + name + \" is a canine: \" +\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (object instanceof Canine));\r\n\u00a0\u00a0\u00a0 System.out.println(\"\u00a0 \" + name + \" is a dog: \" +\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (object instanceof Dog));\r\n\u00a0\u00a0\u00a0 System.out.println(\"\u00a0 \" + name + \" is a retriever: \" +\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (object instanceof Retriever));\r\n\u00a0 }\r\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\/** Taken from Core Web Programming from \u00a0*\u00a0 Prentice Hall and Sun Microsystems Press, \u00a0*\u00a0 . \u00a0*\u00a0 \u00a9 2001 Marty Hall and Larry Brown; \u00a0*\u00a0 may be freely used or adapted. \u00a0*\/ interface Barking {} class Mammal {} class Canine extends Mammal {} class Dog extends Canine implements Barking {} class Retriever extends Dog {} &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"http:\/\/bangla.sitestree.com\/?p=10505\">Continue reading<\/a><\/p>\n","protected":false},"author":130,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1417,1424],"tags":[706,308,285],"class_list":["post-10505","post","type-post","status-publish","format-standard","hentry","category-code-programming-samples--","category-javaj2eej2me","tag-code","tag-java","tag-285","item-wrap"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":26962,"url":"http:\/\/bangla.sitestree.com\/?p=26962","url_meta":{"origin":10505,"position":0},"title":"Tests the class type of an object using the isInstance method (preferred over instanceof operator). #Programming Code Examples #Java\/J2EE\/J2ME #Basic Java","author":"Author-Check- Article-or-Video","date":"May 6, 2021","format":false,"excerpt":"\/** Taken from Core Web Programming from * Prentice Hall and Sun Microsystems Press, * . * \u00a9 2001 Marty Hall and Larry Brown; * may be freely used or adapted. *\/ interface Barking {} class Mammal {} class Canine extends Mammal {} class Dog extends Canine implements Barking {}\u2026","rel":"","context":"In &quot;FromSitesTree.com&quot;","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":10206,"url":"http:\/\/bangla.sitestree.com\/?p=10206","url_meta":{"origin":10505,"position":1},"title":"RMI Example &#8211; Message, illustrates retrieving a message from an object located on a remote server. 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The RMI * server will make a\u2026","rel":"","context":"In &quot;FromSitesTree.com&quot;","block_context":{"text":"FromSitesTree.com","link":"http:\/\/bangla.sitestree.com\/?cat=1917"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":10376,"url":"http:\/\/bangla.sitestree.com\/?p=10376","url_meta":{"origin":10505,"position":3},"title":"Subclass of MouseAdapter","author":"","date":"August 27, 2015","format":false,"excerpt":"!!!!!!!!!!!! ClickListener.java A simple subclass of MouseAdapter that reports where the mouse was pressed. When attached to an applet, look for the report in the Java Console. !!!!!!!!!!!! import java.awt.event.*; \/** The listener used by ClickReporter. \u00a0* \u00a0 \u00a0************** public class ClickListener extends MouseAdapter { \u00a0 public void mousePressed(MouseEvent event)\u2026","rel":"","context":"In &quot;Code . Programming Samples . \u09aa\u09cd\u09b0\u09cb\u0997\u09cd\u09b0\u09be\u09ae \u0989\u09a6\u09be\u09b9\u09b0\u09a8&quot;","block_context":{"text":"Code . 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