instanceof” keyword is used to check what is the type of object. F

The instanceof keyword in Java is used to test whether an object is an instance of a particular class, interface, or subclass. It is a binary operator that returns a boolean value – true if the object is an instance of the specified type, and false otherwise.

Here’s a basic example:

java

public class Example {

public static void main(String[] args) {

String str = "Hello, World!";

// Using instanceof to check if str is an instance of String class
if (str instanceof String) {
System.out.println(“str is an instance of String class”);
} else {
System.out.println(“str is not an instance of String class”);
}
}
}

In this example, instanceof is used to check if the variable str is an instance of the String class. If it is, the first part of the if statement is executed; otherwise, the else part is executed.

The instanceof operator is particularly useful in situations where you need to determine the type of an object before performing certain operations or casting it to a specific type to avoid runtime errors.