If you’re developer and looking for Java Hosting for your Hosted Application, you should look for a serious and pretty flexible hosting providers, take your time to list your few requirements that should include the following Standard Servlet/JSP Features, it will make easy for you to find a good solution which will avoid any future problem.

List of requirement;

* Java Servlet support (JSDK/Servlets)

* Fine-tuned Tomcat VM’s for highest performance

* High-speed delivery of static content

* Tomcat -regularly updated with latest stable releases

* Cocoon 2.1 support

* Tomcat features should include JSP 2.0 and WAR file deployment

* Easy folder layout/knowledgebase for new Tomcat users

* Accessibility of full Servlet Logs, Access Logs

* The plan should have JDBC support

* Configure servlets and compile JSP-DIY configuration

java

* File system access and provide dynamic control

* SQL/Server 2005, MySQL, PostGreSQL and FireBird Databases with JDBC

* Smooth Outgoing network connections/Incoming network connections to run a    Java-based server

*  Convergence and JSPWiki support

* No restriction to use JAR files and appls extensions

* You’ll need full access to applications for reloading via the Tomcat Manager

* The Host should provide Separate JVM and JBoss on request

* You may need isolated Tomcat Host to separate webapps folder for your applications

* Host multiple applications, under your own Tomcat Host

* Tomcat Manager apps should reload/unload applications in real-time

* For Load balancing check the availability of Clustered VM setups

* Secured server and web server stability.
Let me know if I am missing something to list here.

If you think that your hosted application is memory hungry  you should consider a dedicated server otherwise VPS hosting should meet your requirement. The hosting package generally varies pretty wildly between the different hosting options and providers but it would be always good for you if you discuss your requirement with your host providers in detail before you choose a plan.