<pre> 
&lt;html>
	&lt;head>
		&lt;title>JSP Data Entry Form &lt;/title>
	&lt;/head>
	&lt;body bgcolor="lightyellow">
    	&lt;h2 align='center'>The Ice Cream Shop - JSP&lt;/h2>

		&lt;%@ page import="java.util.Arrays" %>
		&lt;% 
			String   firstname = "";
			String   lastname  = "";
			String   address   = "";
			String[] flavors   = null;								//select option list
			String[] toppings  = null;								//checkboxes
			String   cc        = "";
			String   allFlav   = "";
			String   allTop    = "";
        		String   error     = "";
        		String   message   = "";

			String method = request.getMethod();
																	//if GET  --> first time
        		if (method.equals("POST"))								//if POST --> client submitted form
			{														//this must be subsequent time
				firstname  = request.getParameter("fname");
				lastname   = request.getParameter("lname");			//get entered data
				address    = request.getParameter("addr");
				flavors    = request.getParameterValues("flavor"); 
				toppings   = request.getParameterValues("topping"); 
				cc         = request.getParameter("creditCard");

				allFlav = Arrays.toString(flavors);					//join the array [x, y, z]
				allTop  = Arrays.toString(toppings);

				if (cc == null) cc = "";							//change null to ""						

				if (cc.equals(""))
					error  = "Please enter credit card";				
				if (toppings == null)
					error  = "Please enter ice cream topping(s)";				
				if (flavors  == null)
					error  = "Please enter ice cream flavor(s)";				
   				if (address.equals(""))
					error  = "Please enter address";
				if (lastname.equals(""))
					error  = "Please enter last name";
				if (firstname.equals(""))
					error  = "Please enter first name";

				if (error.equals(""))
					message = "&lt;b>Your ice cream order will be processed &lt;/b>&lt;br/>"
					  		+ "&lt;b>For: &lt;/b>" + firstname + " " + lastname + "&lt;br/>"
					  		+ "&lt;b>At.: &lt;/b>" + address   + "&lt;br/>"
					  		+ allFlav + " with " + allTop + "&lt;br/>"
					  		+ "Using credit card: " + cc  + "&lt;br/>";
			}			        
		%>

&lt;form name="form" method="POST" action="example4.jsp">

&lt;fieldset style='width:625px; height:280px; border-color:gold'>
&lt;legend>Enter Fields Below&lt;/legend>

&lt;table bgcolor=tan width=615px>
&lt;tr>
	&lt;td>&lt;b>Enter First Name
	&lt;td>&lt;input type="text" name="fname" value="&lt;%=firstname%>" />
	    &lt;b>&nbsp; Last Name
	    &lt;input type="text" name="lname" value="&lt;%=lastname%>" />
&lt;tr>
	&lt;td>&lt;b>Enter Address
	&lt;td>&lt;textarea name="addr" rows="4" cols="59">&lt;%=address%>&lt;/textarea>
&lt;tr>
	&lt;td>&lt;b>Ice Cream Flavor
	&lt;td>&lt;select name="flavor" SIZE="4" multiple="multiple">
    		&lt;option &lt;%= allFlav.indexOf("Vanilla")       >=0 ?"selected" :"" %> >Vanilla &lt;/option>
    		&lt;option &lt;%= allFlav.indexOf("Chocolate")     >=0 ?"selected" :"" %> >Chocolate&lt;/option>
    		&lt;option &lt;%= allFlav.indexOf("Strawberry")    >=0 ?"selected" :"" %> >Strawberry&lt;/option>
    		&lt;option &lt;%= allFlav.indexOf("Butter Pecan")  >=0 ?"selected" :"" %> >Butter Pecan&lt;/option>
    		&lt;option &lt;%= allFlav.indexOf("Rocky Road")    >=0 ?"selected" :"" %> >Rocky Road&lt;/option>
    		&lt;option &lt;%= allFlav.indexOf("French Vanilla")>=0 ?"selected" :"" %> >French Vanilla&lt;/option>
    		&lt;option &lt;%= allFlav.indexOf("Pistachio")     >=0 ?"selected" :"" %> >Pistachio&lt;/option>
	&lt;/select>
&lt;tr>
	&lt;td>&lt;b>Select Topping
	&lt;td>
	&lt;input type="checkbox" name="topping" value="HF" &lt;%= allTop.indexOf("HF")>=0 ?"checked" :"" %>/> Hot Fudge
	&lt;input type="checkbox" name="topping" value="S"  &lt;%= allTop.indexOf("S") >=0 ?"checked" :"" %>/> Sprinkles
	&lt;input type="checkbox" name="topping" value="N"  &lt;%= allTop.indexOf("N") >=0 ?"checked" :"" %>/> Nuts
	&lt;input type="checkbox" name="topping" value="WC" &lt;%= allTop.indexOf("WC")>=0 ?"checked" :"" %>/> Whipped Cream
&lt;tr>
	&lt;td>&lt;b>Credit Card
	&lt;td>
	&lt;input type="radio" name="creditCard" value="MC"   &lt;%= cc.equals("MC")   ?"checked" :"" %>/> Master Card
	&lt;input type="radio" name="creditCard" value="VISA" &lt;%= cc.equals("VISA") ?"checked" :"" %>/> Visa
	&lt;input type="radio" name="creditCard" value="AMEX" &lt;%= cc.equals("AMEX") ?"checked" :"" %>/> American Express
	&lt;input type="radio" name="creditCard" value="DISC" &lt;%= cc.equals("DISC") ?"checked" :"" %>/> Discover
&lt;tr>
	&lt;td colspan=2>
	&lt;input type="submit" value="  Place Order  " />
	&lt;input type="reset"  value="Cancel"          />
&lt;/table>
&lt;/fieldset>
&lt;/form>         
&lt;p style="color:red">&lt;%=error%>&lt;/p>
&lt;p>&lt;%=message%>&lt;/p>
&lt;/body>
&lt;/html>

</pre>