How to retrieve value from Radiobutton..It always returns null inspite of selecting .

[shalu buchasia]

<Form name = "radio" action = \examples\jsp\rd.jsp method = post>
<INPUT TYPE="RADIO"  NAME="color"  VALUE="red">red
<INPUT TYPE="RADIO"  NAME="color"  VALUE="blue">blue
<INPUT TYPE="RADIO"  NAME="color"  VALUE="green"  checked = true  >green
<input type =submit name = submit value = submit>
</form>

rd.JSP file
<%@page import="RB.colorBean" %> 
<jsp:useBean id="cb"  class="RB.colorBean" />
 <jsp:setProperty name="cb" property="*" />
 Color u chose is<%=cb.getcolor()%> 
 colorbean.java
public class colorBean { 
String color = null; 
  public void setcolor(String tp)
  { color = tp; 
  }
  public String getcolor()
  { return color;
  }
 }

getcolor alwauys returns null? Why? How should I retrieve value from a radio button..

[Anonymous]

In jsp you have to read the value of the button by getParameter()method.then that value passes to the bean to set the color.
thanks.

[shalu buchasia]

Where should I call getparameter in my code.....

[William Brogden]

You have the right approach with:
public void setcolor(String tp)
{ color = tp;
}
public String getcolor()
{ return color;
}
BUT you are not observing the Bean naming rule, those methods should be
setColor( String x)
getColor( )
The variable name part of the method name must start with an upper case letter.
Bill