instanceof Operator

• It is used to check whether the given object belongs to specified class or not.
• Result of instanceof operator is boolean value.
• It returns true if given object belongs to specified class otherwise false.
• It is also called as TYPE COMPARISON OPERATOR.

Syntax:

<referenceVariable> instanceof <class Name>

---

Lab151.java

class Hello {}

class Lab151 {

  public static void main(String[] args) {
    Hello h1 = new Hello();

    System.out.println(h1instanceofHello);
    System.out.println(h1instanceofObject);
  }
}

---

Lab152.java

class Hello {}

class Lab152 {

  public static void main(String[] args) {
    Hello h1 = new Hello();

    System.out.println(h1instanceofString);
  }
}

---

Lab153.java

class Hello {}

class Lab153 {

  public static void main(String[] args) {
    Object obj = new Hello();

    System.out.println(objinstanceofString);
    System.out.println(objinstanceofHello);
    System.out.println(objinstanceofObject);
  }
}

---

Lab154.java

class Hello {}

class Lab154 {

  public static void main(String[] args) {
    Hello h1 = null;
    String str = null;

    System.out.println(h1instanceofHello);
    System.out.println(strinstanceofString);
  }
}