Question

Question 2 (14 marks) a) Complete the following UML diagram as lava classes (8 marks): Write a constructor for Computer ser class based on the information you have in the UML Complete the hasSpaces method to check if a string has space or not il. Extend ComputerUser class with two subclasses, as shown below in UML diagram and write the appropriate methods listed in the UML diagram <<abstract>> ComputerUser # username: String #password: String + Computer User(String, String) + getUsername(): String #setUsername/String) + getPassword(): String + setPassword(String) + hasSpaces(String): boolean + toString(): String Staff - fullname: String + Staff(String, String) + setUsername(String) - getFullName(): String - setFullName(String) Student - address: String + Student(String. String) + setUsername(String) +getAddress(): String + setAddress(String) b) According to the following class specifications, update the appropriate mutator (set) methods so that: All ComputerUsers must be set with a valid password with 16 numerical characters only (no letters, symbols or spaces), Otherwise, the password is left as the empty string (2 marks) Staff must have a username of at least 8 characters, with no spaces For example, employee 2019. Otherwise, the username is set to "defaultemployeeusername (2 marks) II. A Student must have a username of at least 10 characters, with no spaces, Student usernames are automatically formatted and stored in uppercase. For example, STUDENTUSER. Otherwise, the username is set to "DEFAULTSTUDENT" (2 marks)

in java language please

Answer 1

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