This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
my server is J2EE1.2.1 when i write the program and it works fine on my machine, but when my partner runs the program (i keep running), there is an error 500 message shown: Internal Servlet Error: "javax.servlet.ServletException" and "java.lang.NullPointerException" are thrown then i redeploy the program and let only my partner runs it, it still works fine, but after i also run the program (my partner keeps running), the message shown again, it seems that my program can't support multi-user. Would anyone help me? Thx a lot stephen chan