In this tutorial, you will learn about Java instanceof operator in detail with the help of examples.<\/p>\n\n\n\n
The Its syntax is<\/p>\n\n\n\n Here, if objectName<\/var> is an instance of className<\/var>, the operator returns Output<\/strong><\/p>\n\n\n\n In the above example, we have created a variable name<\/var> of the Here, we have used the Note<\/strong>: In Java,\u00a0 We can use the In the above example, we have created a subclass Dog<\/var> that inherits from the superclass Animal<\/var>. We have created an object d1<\/var> of the Dog<\/var> class.<\/p>\n\n\n\n Inside the print statement, notice the expression,<\/p>\n\n\n\n Here, we are using the The In the above example, the Dog<\/var> class implements the Animal<\/var> interface. Inside the print statement, notice the expression,<\/p>\n\n\n\n Here, d1<\/var> is an instance of Dog<\/var> class. The Note<\/strong>: In Java, all the classes are inherited from the In the previous example, if we check,<\/p>\n\n\n\n The result will be In this tutorial, you will learn about Java instanceof operator in detail with the help of examples. The instanceof operator in Java is used to check whether an object is an instance of a particular class or not. Its syntax is Here, if objectName is an instance of className, the operator returns true. Otherwise, it returns false. Example: Java instanceof Output In […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[484],"tags":[],"_links":{"self":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/1200"}],"collection":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/comments?post=1200"}],"version-history":[{"count":0,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/posts\/1200\/revisions"}],"wp:attachment":[{"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/media?parent=1200"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/categories?post=1200"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mudassirbackup.infinitycodestudio.com\/index.php\/wp-json\/wp\/v2\/tags?post=1200"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}instanceof<\/code> operator in Java is used to check whether an object is an instance of a particular class or not.<\/p>\n\n\n\nobjectName instanceOf className;<\/code><\/pre>\n\n\n\ntrue<\/code>. Otherwise, it returns false<\/code>.<\/p>\n\n\n\n
\n\n\n\nExample: Java instanceof<\/h3>\n\n\n\n
class Main {\n\n public static void main(String[] args) {\n\n \/\/ create a variable of string type\n String name = \"Programiz\";\n \n \/\/ checks if name is instance of String\n boolean result1 = name instanceof String;\n System.out.println(\"name is an instance of String: \" + result1);\n\n \/\/ create an object of Main\n Main obj = new Main();\n\n \/\/ checks if obj is an instance of Main\n boolean result2 = obj instanceof Main;\n System.out.println(\"obj is an instance of Main: \" + result2);\n }\n}<\/code><\/pre>\n\n\n\nname is an instance of String: true\nobj is an instance of Main: true<\/samp><\/code><\/pre>\n\n\n\nString<\/code> type and an object obj<\/var> of the Main<\/var> class.<\/p>\n\n\n\ninstanceof<\/code> operator to check whether name<\/var> and obj<\/var> are instances of the String<\/code> and Main<\/var> class respectively. And, the operator returns true<\/code> in both cases.<\/p>\n\n\n\nString<\/code>\u00a0is a class rather than a primitive data type. To learn more, visit\u00a0Java String.<\/p>\n\n\n\n
\n\n\n\nJava instanceof during Inheritance<\/h2>\n\n\n\n
instanceof<\/code> operator to check if objects of the subclass is also an instance of the superclass. For example,<\/p>\n\n\n\n\/\/ Java Program to check if an object of the subclass\n\/\/ is also an instance of the superclass\n\n\/\/ superclass\nclass Animal {\n}\n\n\/\/ subclass\nclass Dog extends Animal {\n}\n\nclass Main {\n public static void main(String[] args) {\n\n \/\/ create an object of the subclass\n Dog d1 = new Dog();\n\n \/\/ checks if d1 is an instance of the subclass\n System.out.println(d1 instanceof Dog); \/\/ prints true\n\n \/\/ checks if d1 is an instance of the superclass\n System.out.println(d1 instanceof Animal); \/\/ prints true\n }\n}<\/code><\/pre>\n\n\n\nd1 instanceof Animal<\/code><\/pre>\n\n\n\ninstanceof<\/code> operator to check whether d1<\/var> is also an instance of the superclass Animal<\/var>.<\/p>\n\n\n\n
\n\n\n\nJava instanceof in Interface<\/h2>\n\n\n\n
instanceof<\/code> operator is also used to check whether an object of a class is also an instance of the interface implemented by the class. For example,<\/p>\n\n\n\n\/\/ Java program to check if an object of a class is also\n\/\/ an instance of the interface implemented by the class\n\ninterface Animal {\n}\n\nclass Dog implements Animal {\n}\n\nclass Main {\n public static void main(String[] args) {\n\n \/\/ create an object of the Dog class\n Dog d1 = new Dog();\n\n \/\/ checks if the object of Dog\n \/\/ is also an instance of Animal\n System.out.println(d1 instanceof Animal); \/\/ returns true\n }\n}<\/code><\/pre>\n\n\n\nd1 instanceof Animal<\/code><\/pre>\n\n\n\ninstanceof<\/code> operator checks if d1<\/var> is also an instance of the interface Animal<\/var>.<\/p>\n\n\n\nObject<\/code> class. So, instances of all the classes are also an instance of the Object<\/code> class.<\/p>\n\n\n\nd1 instanceof Object<\/code><\/pre>\n\n\n\ntrue<\/code>.<\/p>\n","protected":false},"excerpt":{"rendered":"