Security.- In principle, a Java program is less suceptible to certain types of vulnerabilities such as a buffer overflow attack. Java's security model can also allow web content to have access to a complex set of APIs, except in a controlled sandbox.

Expandability.- A Java-based application can be implemented to be expandable via powerful cross-platform plugins. Consider the difference this has made for Java software such as jEdit and Eclipse. (Lobo already has a plugin API).

New paradigms.- With the help of Java we can implement new powerful cross-platform and secure mechanisms to represent web content. We would like to make it easy to integrate arbitrary UI languages into Lobo (e.g. the many XML UI languages that exist). We would also like to support JavaFX by default as a first-class citizen. But we also plan to allow, for example, representation of web content purely as Java source code.

Portability.- This is the obvious advantage of a pure Java application.