Use the wmic command in the cmd console.
For example:
1. Check the startup parameters of java
wmic process where caption="java.exe" get caption,commandline /value
2. Check the startup parameters of a certain pid
wmic process process id get caption,commandline /value
wmic process 35444 get caption,commandline /value
Combining the findstr command, you can find the information you want
wmic process 35444 get caption,commandline /value | findstr -DXmx