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Call the object's public accessor methods

Returning to the Main method in the class named Props01 , Listing 3 calls the object's public accessor methods named setColor and getColor twice in succession.

Listing 3 . Call the object's public accessor methods.

//Call public accessor methods obj.setColor("Red");Console.WriteLine("color: " + obj.getColor()); //Call public accessor methods again with an// invalid input value. obj.setColor("Green");Console.WriteLine("color: " + obj.getColor());

The setColor method

The purpose of the method named setColor is to store a string value in the object. The calling code has no way of knowing how the valueis stored because the implementation is hidden behind a public interface method. This is an example of encapsulation.

The string value to be stored is passed as a parameter to the method each time the method is called. An invalid string value was purposely passed as aparameter on the second call to the setColor method.

The getColor method

The purpose of the getColor method is to retrieve the string value previously stored in the object by the setColor method. Once again, the calling code has no way of knowing how the value is retrievedand returned because the implementation is hidden behind a public interface method.

The value that is retrieved by each call to the getColor method is displayed on the standard output device (the black screen).

Would be a property in Java

If this were a Java program, the combination of these two methods would constitute a property named color because the pair of methods matches the design pattern for properties in Java. However, that is not the casein C#. As you will see later, C# uses a different approach to identify properties. In C#, these are simply public accessor methods used for informationhiding.

The definition of setColor and getColor in TargetClass

Listing 4 defines the public setColor and getColor methods in the class named TargetClass .

Listing 4 . Definition of setColor and getColor methods in TargetClass.

private string colorData = ""; public void setColor(string data){//Validating code if(data.Equals("Red") || data.Equals("Blue")){//Accept incoming data value colorData = data;}else{ //Reject incoming data valuecolorData = "Bad color"; }//end if-else}//end setColor //--------------------------------------------------//public string getColor(){ return colorData;}//end getColor

Typical method definitions

These two methods are typical of the method definition syntax in C#. The syntax is not too different from a function definition in C++ so you should haveno trouble understanding the syntax.

Data validation

One of the reasons for hiding the implementation behind public accessor methods is to assure that only valid data isstored in the object. Therefore, public accessor methods that store data in the object often contain code that validates the incoming data (as shown in Listing 4 ) before actually storing the data in the object.

The validation code in Listing 4 will only accept incoming color data of "Red" or "Blue". If the incoming string doesn't match one of those two values,the string "Bad color" is stored in the object in place of the incoming value.

Questions & Answers

find the 15th term of the geometric sequince whose first is 18 and last term of 387
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The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
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Differences Between Laspeyres and Paasche Indices
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In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
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Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
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Source:  OpenStax, Xna game studio. OpenStax CNX. Feb 28, 2014 Download for free at https://legacy.cnx.org/content/col11634/1.6
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