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📄 example of traditional class field access.htm

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      <p align="center"><font color="#FF0000" size="4"><b>Example of Traditional 
      Class Field Access</b></font></td>
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    <td>　
      <p><font color="#0000ff" size="2">using</font><font size="2"> System;<br>
      </font><font color="#0000ff" size="2"><br>
      public</font><font size="2"> </font><font color="#0000ff" size="2">class</font><font size="2"> 
      PropertyHolder<br>
      {<br>
      </font><font color="#0000ff" size="2">&nbsp;&nbsp;&nbsp;</font><font size="2"> 
      </font><font color="#0000ff" size="2">private</font><font size="2"> </font><font color="#0000ff" size="2">int</font><font size="2"> 
      someProperty = 0;<br>
      <br>
      </font><font color="#0000ff" size="2">&nbsp;&nbsp;&nbsp;</font><font size="2"> 
      </font><font color="#0000ff" size="2">public</font><font size="2"> </font><font color="#0000ff" size="2">int</font><font size="2"> 
      getSomeProperty()<br>
      &nbsp;&nbsp;&nbsp; {<br>
      </font>&nbsp;&nbsp;&nbsp;<font color="#0000ff" size="2">&nbsp;&nbsp;&nbsp;&nbsp; 
      return</font><font size="2"> someProperty;<br>
      &nbsp;&nbsp;&nbsp; }<br>
      </font><font color="#0000ff" size="2"><br>
      &nbsp;&nbsp;&nbsp; public</font><font size="2"> </font><font color="#0000ff" size="2">void</font><font size="2"> 
      setSomeProperty(</font><font color="#0000ff" size="2">int</font><font size="2"> 
      propValue)<br>
      &nbsp;&nbsp;&nbsp; {<br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; someProperty = propValue;<br>
      &nbsp;&nbsp;&nbsp; }<br>
      </font><font color="#0000ff" size="2"><br>
      </font><font size="2">}<br>
      </font><font color="#0000ff" size="2"><br>
      public</font><font size="2"> </font><font color="#0000ff" size="2">class</font><font size="2"> 
      PropertyTester<br>
      {<br>
      </font><font color="#0000ff" size="2">&nbsp;&nbsp;&nbsp;</font><font size="2"> 
      </font><font color="#0000ff" size="2">public</font><font size="2"> </font><font color="#0000ff" size="2">static</font><font size="2"> 
      </font><font color="#0000ff" size="2">int</font><font size="2"> Main(</font><font color="#0000ff" size="2">string</font><font size="2">[] 
      args)<br>
      &nbsp;&nbsp;&nbsp; {<br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PropertyHolder propHold = </font><font color="#0000ff" size="2">new</font><font size="2"> 
      PropertyHolder();<br>
      <br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; propHold.setSomeProperty(5);<br>
      <br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Console.WriteLine(&quot;Property 
      Value: {0}&quot;, propHold.getSomeProperty());<br>
      <br>
      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </font><font color="#0000ff" size="2">return</font><font size="2"> 
      0;<br>
      &nbsp;&nbsp;&nbsp; }<br>
      }</font></td>
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    <td>Listing 10-1 shows the traditional method of accessing class fields.&nbsp; 
      The PropertyHolder class has the field we're interested in accessing.&nbsp; 
      It has two methods, getSomeProperty and setSomeProperty.&nbsp; The 
      getSomeProperty method returns the value of the someProperty field.&nbsp; 
      The setSomeProperty method sets the value of the someProperty field.</td>
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    <td>The PropertyTester class uses the methods of the PropertyHolder class to 
      get the value of the someProperty field in the PropertyHolder class.&nbsp; 
      The Main method instantiates a new PropertyHolder object, propHold.&nbsp; 
      Next it sets the someMethod of propHold to the value 5 by using the 
      setSomeProperty method.&nbsp; Then the program prints out the property 
      value with a Console.WriteLine method call.&nbsp; The argument used to 
      obtain the value of the property is a call to the getSomeProperty method 
      of the propHold object.&nbsp; It prints out &quot;Property Value: 5&quot; 
      to the console.</td>
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    <td>This method of accessing information in a field has been good because it 
      supports the object-oriented concept of encapsulation.&nbsp; If the 
      implementation of someProperty changed from an int type to a byte type, 
      this would still work.&nbsp; Now the same thing can be accomplished much 
      smoother with properties.</td>
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