rJAVA Rstudio bug

https://github.com/rstudio/rstudio/issues/2254

cpsc1100 java, ch2.4, 2.5 using objects. part2

using variables
Java Tutor visualize
http://www.pythontutor.com/java.html#mode=display

Java API
https://docs.oracle.com/javase/8/docs/api/


Accessor and mutator methods.

Ubuntu java install

sudo apt-get update

sudo apt-get install default-jre 

Also: tried "sudo nano -w /etc/enviroment", but it did not work. 

library(xlsx) rJava problem in Rstudio

follow instrucitons on:
http://stackoverflow.com/questions/30738974/rjava-load-error-in-rstudio-r-after-upgrading-to-osx-yosemite

 sudo ln -s $(/usr/libexec/java_home)/jre/lib/server/libjvm.dylib /usr/local/lib/.

java problem for R package installed as sources.

install rJava as sources.

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
as root to add Java support to R.


http://stackoverflow.com/questions/3311940/r-rjava-package-install-failing
This seems to be a common problem.

I went back to R and choose to install binaries. The installation passed.