Answer to Question #54168 in Java | JSP | JSF for Nicholas

An AccountNumber object will store one Destiny Energy (DE) account number. This is a UML class diagram using Java syntax for the members. It is a summary of the design. The full details will follow.
AccountNumber
private int[] digits
public AccountNumber(boolean random)
public String toString()
public static AccountNumber fromString(String number)
private int checksum()

This version uses UML syntax for the members.
AccountNumber
-digits : int[]
+AccountNumber(random : boolean)
+toString() : String
+fromString(number : String) : AccountNumber
-checksum() : int

Fields
private int[] digits

Constructors
public AccountNumber(boolean random)

Methods
public String toString()
public static AccountNumber fromString(String number)
private int checksum()

Implement AccountNumber.toString() and test it as follows:
$ java Test1
000 000 000 00
$