Jacoco是一个Java代码覆盖率统计工具

Jacoco是一个Java代码覆盖率统计工具，见：http://www.eclemma.org/jacoco/

JaCoCo is a free code coverage library for Java, which has been created by the EclEmma team based on the lessons learned from using and integration existing libraries for many years.

note:

Jacoco weaves an additional field named $jacocoData
into the inspected classes.

When invoking Class.getDeclaredField(), there
will be an additional $jacocoData field.

Class cl=obj.getClass();

Field[] fields=cl.getDeclaredFields();