The instanceof keyword in Java programming language

In this tutorial, we will discuss about the instanceof keyword in Java programming language

In Java programming language the instanceof is a keyword or operator, which is used to check the type of an object at run time. The instanceof operator helps to compare the instance with type and it return either true or false

What is the usage of instaceof keyword

Test whether the reference variable on the left is an instance /object of the specified type (class or sub class or interface) on the right

Reference_Variable instanceof class_name/interface_name

Example

Sample s=new Sample;
System.out.println(s instanceof Sample);

instanceof using with if

if(object intanceof base){
//statement(s)
}

program 1

class My_School{              //class with class name
public static void main(String args[]){ //main metod
school s=new school();//object for class
System.out.println(s instanceof school);//true
}
}

When the above code is executed, it produces the following results:

True