Joular JX

JoularJX is a Java-based agent for software power monitoring at the source code level.

Monitor power consumption of each method at runtime
Uses a Java agent, no source code instrumentation needed
Uses Intel RAPL (powercap interface) for getting accurate power reading on GNU/Linux, our research-based regression models on Raspberry Pi devices, and a custom program monitor (based on Intel Power Gadget) for accurate power readings on Windows
Provides real time power consumption of every method in the monitored program
Provides total energy for every method on program exit

JoularJX is a Java agent where you can simply hook it to the Java Virtual Machine when starting your Java program:

java -javaagent:joularjx-$version.jar yourProgram