config-prettyfaces/src/main/java/com/ocpsoft/pretty/faces/url/QueryString.java
public String getParameter(final String name)
   {
      List<String> values = parameters.get(name);
      if (values == null)
      {
         return null;
      }

      if (values.size() == 0)
      {
         return "";
      }

      return values.get(0);
   }
public String getParameter(final String name)
   {
      List<String> values = parameters.get(name);
      if (values == null)
      {
         return null;
      }

      if (values.size() == 0)
      {
         return "";
      }

      return values.get(0);
   }
public String getParameter ( final String name ) { List < String > values = parameters . get ( name ) ; if ( values == null ) { return null ; } if ( values . size ( ) == 0 ) { return "" ; } return values . get ( 0 ) ; }
Get the first value of given parameter name.

@return The value of the parameter, null if the parameter does not exist, or "" if the parameter exists but has no
values.
Get the first value of given parameter name .