How to get array list size in java jsp?

Newer versions of EL accept using the methods defined in the class of the object in EL expressions, so you can simply call the size() method:

<span>Size: ${list.size()}</span>

Use fn:length function.

Declare fn namespace on the begining of the JSP file

<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>

Later in the code

${fn:length(collection)}