Hi All, I have tomcat installed on linux with jdk 1.1.6 and have some problems. when tried to compilering java classes: 1) I get error: class ArrayList not found in type declaration 2) when I use package like: in a.java package PACK; ... public class a... in b.java package PACK; ... public class b... private a ac = null; and put a.java and b.java under PACK/ javac a.java ....OK but javac b.java got error: class PACK.a not found in type declaration. Is this due to the version of jdk and jdk 1.2 or up is needed to support ArrayList and package ? TIA Jerry