Menu
E.g.
<c:if test="${post}"> <h3>${post.title}</h3> </c:if> 
225
The first way is to use the JSTL tag and empty operator to check if an ArrayList is empty and the second way is to use the JSTL function, fn: length() instead of the empty operator as shown in our example.
The Java programming language distinguishes between null and empty strings. An empty string is a string instance of zero length, whereas a null string has no value at all. An empty string is represented as "" . It is a character sequence of zero characters.
To check if a string is null or empty in Java, use the == operator.
Summarized: empty doesn't work on Set when using the ancient JSTL 1.0. You'd need to upgrade to JSTL 1.1 (which is from 2003 already).
Use the empty keyword
<c:if test="${not empty post}"> <h3>${post.title}</h3> </c:if> If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
