I don't read batch, but it looks lixe an approximation would be:
java -Xmx815m -cp /path/to/java/bin;/path/to/java/lib com.rs.Launcher true true false
However, I have no idea what you are trying to do because "So I have connected to my VPS, I have uploaded the required files but when I want to start the server." is not a complete sentence. Explain what you are seeking to achieve, and what you have to work with, and a much more sane answer can probably be provided.