Java Clients
A Java client is included with a standard OME and OMERO systems. This Java client provides a few capabilities (such as an interactive dataset browser) which are difficult or impossible to implement in a Web browser. However, unlike the Web client, the Java client must be installed on a client machine before it can be used.
Assuming that you have a new enough version of Java installed on your client machine (which most operating systems include these days), installation of the Java client is very straightforward.