UML Class Diagrams

ClassName

vis attribute : type

vis operation(arg list) : return type

Note:

• The arg list is a list of parameter types (e.g., int, double, String); parameter names are not included in the UML class diagram
• Methods that don't return a value (i.e. void methods) should give a return type of void
• Class (i.e. static) methods and fields are indicated by underlining
• Constant (i.e. final) fields are indicated via naming convention: constants should be in ALL_CAPS

Example:

UML diagram

Employee

-name:String -payRate:double -EMPLOYEE_ID:int -nextID:int +STARTING_PAY_RATE:double

+Employee(String) +Employee(String, double) +getName():String +getEmployeeID():int +getPayRate():double +changeName(String):void +changePayRate(double):void +getNextID():int

Corresponding Java Class

public class Employee {

    private String name;
    private double payRate;
    private final int EMPLOYEE_ID;
    
    private static int nextID = 1000;
    
    public static final double STARTING_PAY_RATE = 7.75;
    
    public Employee(String name) {
        this.name = name;
        EMPLOYEE_ID = getNextID();
        payRate = STARTING_PAY_RATE;
    }
    
    public Employee(String name, double startingPay) {
        this.name = name;
        EMPLOYEE_ID = getNextID();
        payRate = startingPay;
    }
    
    public String getName() { return name; }
    
    public int getEmployeeID() { return EMPLOYEE_ID; }
    
    public double getPayRate() { return payRate; }
    
    public void changeName(String newName) { name = newName; }
    
    public void changePayRate(double newRate) { payRate = newRate; }
    
    public static int getNextID() {
        int id = nextID;
        nextID++;
        return id;
    }
}