IntelliJ has a Community Edition for free. The author put up Eclipse and Netbeans for how long, rather than using the CE? Sure the commercial version has more

IntelliJ has a Community Edition for free. The author put up Eclipse and Netbeans for how long, rather than using the CE? Sure the commercial version has more features than the CE one, but the example he gave would surely have been identified by the CE version of IntelliJ.