In Java:

In the class definition, initialize the private fields number (integer), greeting (string), and areaCode (integer) with the default values 1, "Unknown", and 1, respectively.

Ex: If the input is 6739263 Huy 684, then the output is:

Default values: Number: 1, Greeting: Hello this is Unknown, Area code: 1 After mutator methods: Number: 6739263, Greeting: Hello this is Huy, Area code: 684

Note: The class's print() method is called before and after the input is passed to the setters.

public class Message {

private /* Your code goes here */ private /* Your code goes here */ private /* Your code goes here */

public void setNumber(int messageNumber) { number = messageNumber; } public void setGreeting(String messageGreeting) { greeting = messageGreeting; } public void setAreaCode(int messageAreaCode) { areaCode = messageAreaCode; } public void print() { System.out.println("Number: " + number + ", Greeting: Hello this is " + greeting + ", Area code: " + areaCode); } }