how to invoke a java service externally

hi every body may i know how to invoke a java service externally i.e using browser

Standard URL for IS services, such as:

http://serverName:port/invoke/folder.subfolder:javaSvcName

Most of the WmPublic services are java services, such as

http://myServer:5555/invoke/pub.math:addFloats?num1=10&num1=20