我的系统为ubuntu14.04，
安装的java版本：
hadoop@ubuntu:~$ java -version
java version "1.8.0_77"
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) Client VM (build 25.77-b03, mixed mode)


R版本为：
R version 3.2.4 Revised (2016-03-16 r70336) -- "Very Secure Dishes"
Copyright (C) 2016 The R Foundation for Statistical Computing
Platform: i686-pc-linux-gnu (32-bit)


然后设置rJava环境时出现如下错误：
hadoop@ubuntu:~$ sudo R CMD javareconf
*** JAVA_HOME is not a valid path, ignoring

*** Cannot find any Java interpreter
*** Please make sure 'java' is on your PATH or set JAVA_HOME correspondingly


不知道问题出在哪里，求大神帮我解答？？？多谢多谢多谢