JSTL: JSP Standard Tag Library (by Jeff Heaton)
Chapter 3: Understanding Basic Tag Logic

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Exceptions

Listing 3.1 Division by zero is not an exception
Listing 3.2 An uncaught exception (page will display an error)
Listing 3.3 Catch division by zero
Listing 3.4 Catch an exception

Conditions

Listing 3.5 If statement with a body
Listing 3.6 If statement with no body
Listing 3.7 Mutual exclusion
Listing 3.8 "If" statement with "else"

Chat Application

Listing 3.9 Chat login
Listing 3.10 Main chat page