This is a class with solid fundamentals! This is a class that is absolutely necessary for the basics of JSP. The lecture uses a slightly older version as of 21, but you can listen to it without difficulty. However, if the Java version is different, Tomcat 8.0 will not be installed. You need to set the resource part of server.xml differently for it to be implemented normally. If there is a Java lecture, I want to listen to it again to solidify the basics. The instructor's lecture was so good. There were times when my child cried in the middle, but I thought it was just everyday noise and listened. The implementation on the JSP page is complicated and there are many page connections, but it was good that it was explained in an easy-to-understand way :)