Dear all,

I am trying to install "rJava" into R but getting following errors. OS= centOS; R version = R-3.2.3

checking Java support in R... present:
interpreter : '/usr/bin/java'
archiver    : '/usr/bin/jar'
compiler    : '/usr/bin/javac'
header prep.: '/usr/bin/javah'
cpp flags   : ''
java libs   : ''
configure: error: One or more Java configuration variables are not set.
Make sure R is configured with full Java support (including JDK). Run
R CMD javareconf

Then I tried with

locate jni.h
/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.95-2.6.4.0.el7_2.x86_64/include/jni.h

and run

[root@localhost ~]# R CMD javareconf
Java interpreter : /usr/bin/java
Java version     : 1.8.0_71
Java home path   : /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.71-2.b15.el7_2.x86_64/jre
Java compiler    : /usr/bin/javac
Java headers gen.: /usr/bin/javah
Java archive tool: /usr/bin/jar

trying to compile and link a JNI program
detected JNI cpp flags    :
detected JNI linker flags : -L$(JAVA_HOME)/lib/amd64/server -ljvm
gcc -std=gnu99 -I/usr/SoftwareDownload/R-3.2.3/include -DNDEBUG  -I/usr/local/include -fpic  -g -O2  -c conftest.c -o conftest.o
conftest.c:1:17: fatal error: jni.h: No such file or directory
 #include <jni.h>
                 ^
compilation terminated.
make: *** [conftest.o] Error 1
Unable to compile a JNI program

JAVA_HOME        : /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.71-2.b15.el7_2.x86_64/jre
Java library path:
JNI cpp flags    :
JNI linker flags :
Updating Java configuration in /usr/SoftwareDownload/R-3.2.3
Done.