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Bundled Tomcat can be setup to support 1.5 features in JSPs. IDE could do it automatically when user sets 1.5 Source level of WebApp. Although Tomcat using non-jasper parser (default Tomcat configuration) doesn't have this possibility. Notice: Running Bundled Tomcat on 1.4.x JDK with source level set to 1.5 (see bellow) will fail all JSP compilations. Modify TOMCAT_BASE/conf/web.xml <servlet> <servlet-name>jsp</servlet-name> <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class> <init-param> <param-name>fork</param-name> <param-value>false</param-value> </init-param> <init-param> <param-name>xpoweredBy</param-name> <param-value>false</param-value> </init-param> + <init-param> + <param-name>compilerSourceVM</param-name> + <param-value>1.5</param-value> + </init-param> + <init-param> + <param-name>compilerTargetVM</param-name> + <param-value>1.5</param-value> + </init-param> <init-param> <param-name>mappedfile</param-name> <param-value>true</param-value> </init-param> <load-on-startup>3</load-on-startup> </servlet> Based on nbusers thread: http://www.netbeans.org/servlets/ReadMsg?list=nbusers&msgNo=53786