Program/Source Code:

The source code to call an Instance Initializer Block using an anonymous object is given below. The given program is compiled and executed successfully.

// Java program to call an Instance Initializer Block 
// using the anonymous object

class Sample {
  {
    System.out.println("Instance initializer block called");
  }

  Sample() {
    System.out.println("Constructor called");
  }

}
public class Main {
  public static void main(String[] args) {
    new Sample();
  }
}

Output:

Instance initializer block called
Constructor called

Explanation:

In the above program, we created two classes Sample and Main. The Sample class contains an IIB (Instance Initializer Block) and a constructor.