Timothy

Entity Class 實體類別

UML->Domain Model

Method->行為規範(抽象描述)

Method  拆成兩個來看

1. 結構 (抽象描述)
2. Body

例: (飛行)

1. 飛機
2. 鳥                        ===== >  抽出來成為 介面 Interface (飛)
3. 超人

 Abstract Class 特色：1.有抽像Method類別一定為抽象類別 2. 不能建構成物件

 

'抽象類別 有一定子類別 
Public MustInherit Class Employee
    'Data Field
    Protected _id As String
    Protected _name As String
    Protected _salary As Decimal
    '建構子
    Public Sub New()

    End Sub
    'OverLoading建構子
    Public Sub New(ByVal _id As String, ByVal _name As String)
        Me._id = _id
        Me._name = _name
    End Sub

    Public Property Id() As String
        Get
            Return _id
        End Get
        Set(ByVal value As String)
            Me._id = value
        End Set
    End Property

    Public Property Name() As String
        Get
            Return Me._name
        End Get
        Set(ByVal value As String)
            Me._name = value
        End Set
    End Property
    '薪資計算(有寫像沒寫 子類別都不用)
    '定結構 不寫本體-描述成抽象method
    Public MustOverride Sub calSalary(ByVal b As Decimal)
End Class

VB.NET 抽象類別定義:

 

Public MustInherit Class Employee

VB.NET  抽象方法定義:

 

Public MustOverride Sub calSalary(ByVal b As Decimal)