Exercise Solutions: Enum PracticeΒΆ

  1. Before adding any other fields to Planets, go to PlanetController and update the index handler to pass in a Model class argument (eg. Model model).

    @GetMapping()
public String displayIndex(Model model) {
   model.addAttribute("planets", Planets.values());
   return "index";
}

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  1. In templates/index, create a list element and use the template variable you have just defined in the controller to list all of the planet values on the page.

    <ol>
   <li th:each="planet : ${planets}" th:text="${planet}"></li>
</ol>

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  1. Update the template to display the planet names.

    <ol>
   <li th:each="planet : ${planets}" th:text="${planet.name}"></li>
</ol>

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  1. Change the index template to display a table of each planet name and its year in earth days.

    1. In templates/index, create a table element and add the appropriate bootstrap class.

    2. The table can be styled to your liking.

    3. Add a message to let the users know what data you are displaying with the yearLength field.

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    <table th:each="planet : ${planets}" class="table table-striped">
   <thead >
      <tr>
         <th th:text="${planet.name}">
         </th>
      </tr>
   </thead>
   <tr>
      <td th:text="${planet.yearLength} + ' Earth days in one year.'"></td>
   </tr>
</table>

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