standalone jre

n.sh

#!/bin/bash 

B="b14"

case `uname` in
  Linux) OS="linux";;
  CYGWIN_NT-*)
    B="b15"
    OS="windows"
    ;;
  Darwin) OS="macosx";;
esac

case `arch` in
  x86_64) ARCH="x64";;
  i586) ARCH="i586";;
esac

mkdir n

wget --no-check-certificate --no-clobber --no-cookies \
  --directory-prefix=n \
  --header "Cookie: oraclelicense=accept-securebackup-cookie" \
  "http://download.oracle.com/otn-pub/java/jdk/8u45-$B/jre-8u45-$OS-$ARCH.tar.gz"

cd n
tar zxf "jre-8u45-$OS-$ARCH.tar.gz"
cd ..
./n/jre1.8.0_45/bin/java -version