How to make javax.faces.model.SelectItem selected

Assume we have this JSF code:

<h:selectManyCheckbox value="#{bean.selectedValues}">
    <f:selectItems value="#{bean.playerList}"/>
</h:selectManyCheckbox>

then the selected values (i.e. the checked checkboxes) are stored in the bean.selectedValues property.

Thus, in your Java code, you must handle the selectValues by putting the correct ID in the selectedValues property.