SIS to JAR conversion is mainly used for the purpose of converting app installation packages between various Symbian phones.For example Nokia S60 series uses *.sis files whilst Nokia S40 used *.jar files. The best way is to get some of the utilities for Nokia and convert SIS to JAR.
Convert Symbian installation file to Compressed archive file package for Java classes and data.
We found one software available in the database for this conversion.
Microsoft Windows software - convert sis to jar on Windows
A dedicated converter for Symbian packages
Convert from sis file format
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.