CS 241 – Computer Programming II Lab Kalpa Gunaratna –

Contact  Contact by   Office hours  376 Joshi  Mondays & Wednesday 3:00 pm – 4:00 pm

UML class diagram tips….  Basic class structure.  Access modifiers  + public, - private, # protected Class name Variable declarations : Method declarations ( : ) :

Java class and equivalent UML Class  Example : Public Class MyClass { Private int x; Public String y; Private void setVal(int z) { x = z; } Public String getName() { return y; } MyClass - x : int + y : String + setVal(z : int) + getName() :String

Comments  // - single line comment  /* */ - multiple line comments  /** */ - javadoc comments  Example JavaDoc commnet /** Takes input value y and calculates fixed amount and returns the calculated value. Pre-condition: value should be an integer of the range 1 – 9 Post-condition: value is equal to the expected y input integer returns calculated value */ Public int calcValue(int y) { return 5; }

In lab  Draw UML class diagram and explain during the lab.  Put your method signature only into java class and should compile without any error.  All methods should have JavaDoc comment and inline comments or comment blocks.  UML and class should have all the methods listed in the assignment page.

Post lab  Implement your stubbed java class.  Must have javadocs and comments as in in lab.  Call your methods and test whether they are working as mentioned in javadocs.

enum  You can type enum with whatever name you want to use, lets say you need days of week to be represent in constants, enum Days{MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY};  When you want to access MONDAY, use Days.MONDAY  See example in assignment.  More information and how to use enum : tml tml