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<html:checkbox property="someprop" value="true">Yes</html:checkbox>

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String somepropValue = null; 
if((somepropValue = request.getParameter("someprop"))!=null) 
{  
  // ckecked 
  System.out.println("The box is checked and its value is " + somepropValue); 
} 
else  
{ 
  // not ckecked 
  System.out.println("The box is not checked"); 
  // set the value 
  someprop = "false"; 
}

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public class MonForm extends ActionForm {  
  
  boolean alerterParMail = false;  
  
  public void reset(ActionMapping mapping, HttpServletRequest request) {  
    super.reset(mapping,request);  
    alerterParMail = false;  
  }  
}

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<logic:iterate name="uneCollection" id="element"> 
   <html:radio property="nomRadio" idName="element" value="id"> 
      <bean:write name="element" value="nom"/> 
   </html:radio> 
</logic:iterate>