WebApp Using JDK 1.4, Tomcat 5.5.17 or 5.0.28?

[Mississippi John Hurt]

Hi,
My web application was developed against JDK 1.4.2.  I heard Tomcat
5.5.17runs internally on JDK
1.5.  Is it a problem to deploy my webapp on Tomcat 5.5.17?  Or can webapps
developed under jdk 1.4.2 run fine unchanged on Tomcat 5.5.17?