c# 2d data matrix Figure 4-4. Instance members are distinct between class objects. in C#

Print Data Matrix ECC200 in C# Figure 4-4. Instance members are distinct between class objects.

Figure 4-4. Instance members are distinct between class objects.
ECC200 Drawer In C#.NET
Using Barcode printer for VS .NET Control to generate, create DataMatrix image in .NET framework applications.
www.OnBarcode.com
Recognizing DataMatrix In Visual C#
Using Barcode decoder for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
CHAPTER 4 CLASSES: THE BASICS
Painting PDF 417 In Visual C#
Using Barcode printer for .NET Control to generate, create PDF 417 image in .NET applications.
www.OnBarcode.com
Code 128A Generator In C#
Using Barcode generator for VS .NET Control to generate, create ANSI/AIM Code 128 image in Visual Studio .NET applications.
www.OnBarcode.com
Access Modifiers
Make Linear Barcode In C#.NET
Using Barcode generator for .NET Control to generate, create 1D Barcode image in VS .NET applications.
www.OnBarcode.com
ECC200 Maker In Visual C#.NET
Using Barcode creation for .NET framework Control to generate, create Data Matrix ECC200 image in .NET framework applications.
www.OnBarcode.com
From within a class, any function member can access any other member of the class simply by using that member s name. The access modifier is an optional part of a member declaration that specifies what other parts of the program have access to the member. The access modifier is placed before the simple declaration forms shown previously. The following is the syntax for fields and methods: Fields AccessModifier Type Identifier; Methods AccessModifier ReturnType MethodName () { ... } The five categories of member access are the following. I will describe the first two in this chapter, and the others in 7. private public protected internal protected internal
Print EAN 13 In Visual C#
Using Barcode generation for .NET framework Control to generate, create EAN13 image in .NET applications.
www.OnBarcode.com
ISBN Encoder In Visual C#
Using Barcode encoder for VS .NET Control to generate, create ISBN - 13 image in .NET framework applications.
www.OnBarcode.com
Private and Public Access
Create Data Matrix ECC200 In Java
Using Barcode generation for Java Control to generate, create DataMatrix image in Java applications.
www.OnBarcode.com
Read Data Matrix ECC200 In VS .NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Private members are only accessible from within the class in which they are declared other classes cannot see or access them. Private access is the default access level so if a member is declared without an access modifier, it is a private member. You can also use the private access modifier to explicitly declare a member private. There is no semantic difference between declaring a private member implicitly as opposed to explicitly. They act exactly the same. For example, the following two declarations both specify private int members: int MyInt1; private int MyInt2; Access modifier // Implicitly declared private // Explicitly declared private
GTIN - 128 Creator In .NET Framework
Using Barcode maker for ASP.NET Control to generate, create UCC-128 image in ASP.NET applications.
www.OnBarcode.com
Print PDF-417 2d Barcode In .NET Framework
Using Barcode drawer for ASP.NET Control to generate, create PDF-417 2d barcode image in ASP.NET applications.
www.OnBarcode.com
CHAPTER 4 CLASSES: THE BASICS
Paint Barcode In Objective-C
Using Barcode encoder for iPad Control to generate, create Barcode image in iPad applications.
www.OnBarcode.com
Data Matrix 2d Barcode Drawer In Java
Using Barcode creation for BIRT reports Control to generate, create Data Matrix 2d barcode image in Eclipse BIRT applications.
www.OnBarcode.com
Public members are accessible to all other objects in the program. Use the public access modifier to specify public access. Access modifier public int MyInt;
Drawing Linear In .NET
Using Barcode creator for Visual Studio .NET Control to generate, create Linear 1D Barcode image in VS .NET applications.
www.OnBarcode.com
Drawing Barcode In Java
Using Barcode generation for Java Control to generate, create Barcode image in Java applications.
www.OnBarcode.com
Depicting Public and Private Access
Code 128C Encoder In Objective-C
Using Barcode encoder for iPhone Control to generate, create USS Code 128 image in iPhone applications.
www.OnBarcode.com
Encoding QR Code ISO/IEC18004 In Java
Using Barcode drawer for BIRT reports Control to generate, create QR Code image in BIRT applications.
www.OnBarcode.com
The figures in this text represent classes as labeled boxes, as shown in Figure 4-5. The class members are represented as smaller labeled boxes inside the class boxes. Private members are represented enclosed entirely within their class box. Public members are represented sticking partially outside their class box.
Draw 2D Barcode In Java
Using Barcode maker for Java Control to generate, create Matrix Barcode image in Java applications.
www.OnBarcode.com
Paint Data Matrix ECC200 In None
Using Barcode generator for Microsoft Excel Control to generate, create Data Matrix ECC200 image in Excel applications.
www.OnBarcode.com
Figure 4-5. Representing classes and members
CHAPTER 4 CLASSES: THE BASICS
Example of Member Access
Class C1 declares both public and private fields and methods. Figure 4-6 illustrates the visibility of the members of class C1. class C1 { int F1; private int F2; public int F3; void DoCalc() { ... } public int GetVal() { ... } }
// Implicit private field // Explicit private field // Public field // Implicit private method
// Public method
Figure 4-6. Private and public class members
CHAPTER 4 CLASSES: THE BASICS
Accessing Members from Inside the Class
As mentioned before, members of a class can access the other class members by just using their names. For example, the following class declaration shows the methods of the class accessing the fields and other methods. Even though the fields and two of the methods are declared private, all the members of a class can be accessed by any method (or any function member) of the class. The code is illustrated in Figure 4-7. class DaysTemp { // Fields private int High = 75; private int Low = 45; // Methods private int GetHigh() { return High; } private int GetLow() { return Low; } public float Average () { return (GetHigh() + GetLow()) / 2; } } Accessing the private methods
// Access private field
// Access private field
// Access private methods
Figure 4-7. Members within a class can freely access each other.
CHAPTER 4 CLASSES: THE BASICS
Accessing Members from Outside the Class
To access a public instance member from outside the class, you must include the variable name and the member name, separated by a period (dot). This is called dot-syntax notation; it will be discussed in more detail later. For example, the second line of the following code shows an example of accessing a method from outside the class: DaysTemp MyDt = new DaysTemp(); float FValue = MyDt.Average(); Variable name Member name // Create an object of the class. // Access it from outside.
As an example, the following code declares two classes: DaysTemp and Program. The two fields in DaysTemp are declared public, so they can be accessed from outside the class. Method Main is a member of class Program. It creates a variable and object of class DaysTemp, and assigns values to the fields of the object. It then reads the values of the fields and prints them out. class DaysTemp { public int High = 75; public int Low = 45; } // Declare class DaysTemp
class Program // Declare class Program. { static void Main() { Variable name DaysTemp Temp = new DaysTemp(); // Create the object. Variable name and field Temp.High = 85; // Assign to the fields. Temp.Low = 60; Variable name and field Console.WriteLine("High: {0}", Temp.High ); // Read from fields. Console.WriteLine("Low: {0}", Temp.Low ); } } This code produces the following output: High: Low: 85 60
Copyright © OnBarcode.com . All rights reserved.