Alternating color runs in a table

Question

I have a bean that returns a few ArrayLists. I am displaying the results in a jsp in a table. What is the best way in jsp for me to get the colors of the <tr> to alternate?

Answer 1

This works - I think adding the values into the pageContext is key:
<%@ page language="java" %>
<%@ page import="java.util.ArrayList" %>
<%@ page import="java.util.List" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
<%
    List payPeriods = new ArrayList();
    for (int index = 0; index < 10; ++index)
        payPeriods.add(new Integer(index*index));
    pageContext.setAttribute("payPeriods", payPeriods);
%>
<center>
<h3>Alternating Color Test</h3>
<table border="1">
    <tr bgcolor="#ffad00">
        <th>Row Number</th>
        <th>Value</th>
    </tr>
    <c:forEach items="${payPeriods}" var="payPeriod" varStatus="status">
        <c:choose>
            <c:when test="${(status.count % 2) == 0}">
                <tr bgcolor="#77ccff">
            </c:when>
            <c:otherwise>
                <tr bgcolor="#ffffff">
            </c:otherwise>
        </c:choose>
            <td>
                <c:out value="${status.count}"/>
            </td>
            <td>
                <c:out value="${payPeriod}"/>
            </td>
        </tr>
    </c:forEach>
</table>
</center>It's not exactly your case, but it does show the alternating colors. I'll leave the changes to you.