Java The Type Comparison Operator instanceof

The instanceof operator compares an object to a specified type. You can use it to test if an object is an instance of a class, an instance of a subclass, or an instance of a class that implements a particular interface.

When using the instanceof operator, keep in mind that null is not an instance of anything.

Screenshots of Instanceof Operator Java Program

Simple Java Program Example Instanceof operator:



// Java Program Instanceof Operator

public class InstanceofOp {
    public static void main(String[] args) {

        Parent obj1 = new Parent();
        Parent obj2 = new Child();

        System.out.println("obj1 instanceof Parent: "
            + (obj1 instanceof Parent));
        System.out.println("obj1 instanceof Child: "
            + (obj1 instanceof Child));
        System.out.println("obj1 instanceof MyInterface: "
            + (obj1 instanceof MyInterface));
        System.out.println("obj2 instanceof Parent: "
            + (obj2 instanceof Parent));
        System.out.println("obj2 instanceof Child: "
            + (obj2 instanceof Child));
        System.out.println("obj2 instanceof MyInterface: "
            + (obj2 instanceof MyInterface));
    }
}
class Parent {}
class Child extends Parent implements MyInterface {}
interface MyInterface {}
 

Output Here In cmd Window

Download Source code 'Java Instanceof Operators Program'

Java Operators
Arithmetic Operators
Assignment Operator
Bitwise Operators
instanceof Operator
Relational Operators
Unary Operators
Conditional Operators

References : oracle

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