Program/Source Code:

The source code to call a method using an anonymous object is given below. The given program is compiled and executed successfully.

// Java program to call a method using 
// an anonymous object

class Sample {
  void sayHello() {
    System.out.println("Hello World");
  }

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

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

Output:

Constructor called
Hello World

Explanation:

In the above program, we created two classes Sample and Main. The Sample class contains a constructor and sayHello() method.

The Main class contains a method main(). The main() method is the entry point for the program, here we created an anonymous object of the Sample class and called constructor and sayHello() method and printed messages.