If you encounter problems, you can download Java free from Sun Microsystems. The URL is:
http://java.sun.com/j2se/1.4/download.html
Note: Currently, to get the plug-in, you must download the entire Java Run Time Environment, which is greater than 5 MB. Netscape version 6.1 for Windows appears to support the Merkato Java applications, but it is not fully tested for Merkato version 2.3.