This paper establishes a general framework for estimating the energy consumption of an embedded Java Virtual Machine (JVM). The paper has designed a number of experiments to find the constant overhead of the Virtual Machine and establish an energy consumption cost for individual Java Opcodes. The results show that there is a basic constant overhead for every Java program, and that a subset of Java opcodes have an almost constant energy cost. The paper also shows that memory access is a crucial energy consumption component.
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