Hi, I worked in Java for a couple of years 2000-2002. Earned an SCJP 1.2 certification, followed by an SCWCD. Have lost touch with Java since then, due to various reasons. Now, I want to upgrade my skill set to JDK 1.5 or at least JDK 1.4 - assertions, java.nio packages etc. What's the best way of doing it? Has anyone had to go thru this before? Would appreciate any and all input. Thanks.