R安装时的问题

R在安装  rJava 包是可能 安装不成功

问题1：

checking Java support in R... present:
interpreter : '/usr/lib/jvm/jre/bin/java'
archiver    : '/usr/lib/jvm/jre/../bin/jar'
compiler    : '/usr/lib/jvm/jre/../bin/javac'
header prep.: '/usr/lib/jvm/jre/../bin/javah'
cpp flags   : '-I/usr/lib/jvm/java/include I/usr/lib/jvm/java/include/linux'
java libs   : '-L/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/lib/amd64/server -ljvm'
checking whether Java run-time works... ./configure: line 3729: /usr/lib/jvm/jre/bin/java: No such file or directory
no configure: error: Java interpreter '/usr/lib/jvm/jre/bin/java' does not work

　　

原因在于 rJava默认会找系统JAVA_HOME 如果没有配置 JAVA_HOME 则会使用   /usr/lib/jvm/jre/bin/java  该目录可能在本机没有

解决办法是指定JAVA_HOME，之后重置R中环境变量

export JAVA_HOME=$PWD/env/java/jdk8

R CMD javareconf      

问题2

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   : '-I/usr/lib/jvm/java-6-sun-1.6.0.20/jre/../include -I/usr/lib/jvm/java-6-sun-1.6.0.20/jre/../include/linux'
java libs   : '-L/usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64/server -L/usr/lib/jvm/java-6-sun-1.6.0.20/jre/lib/amd64 -L/usr/lib/jvm/java-6-sun-1.6.0.20/jre/../lib/amd64 -L -L/usr/java/packages/lib/amd64 -L/usr/lib64 -L/lib64 -L/lib -L/usr/lib -ljvm'
checking whether JNI programs can be compiled... yes
checking JNI data types... configure: error: One or more JNI types differ from the corresponding native type. You may need to use non-standard compiler flags or a different compiler in order to fix this.
ERROR: configuration failed for package ‘rJava’

　该问题是没有配置 LD_LIBRARY_PATH  环境变量，解决办法和问题1 一样

export LD_LIBRARY_PATH=$JAVA_HOME/jre/lib/amd64:$JAVA_HOME/jre/lib/amd64/server

R CMD javareconf

　　

所有该种问题可以一起设置

export JAVA_HOME=$PWD/env/java/jdk8
export LD_LIBRARY_PATH=$JAVA_HOME/jre/lib/amd64:$JAVA_HOME/jre/lib/amd64/server

R CMD javareconf