> library(rJava)
Error: package or namespace load failed for ‘rJava’:
loadNamespace()里算'rJava'时.onLoad失败了，详细内容：
  调用: fun(libname, pkgname)
  错误: No CurrentVersion entry in Software/JavaSoft registry! Try re-installing Java and make sure R and Java have matching architectures.
In addition: Warning message:
程辑包‘rJava’是用R版本3.5.3 来建造的
> Sys.setenv(JAVA_HOME='c:/Program Files (x86)/Java/jdk-12.0.2/')
> library(rJava)
Warning message:
程辑包‘rJava’是用R版本3.5.3 来建造的