Error while installing JDK 1.6 on Linux?

Question

Hi,
Could not locate a suitable jar utility.
Please ensure that you have Java 6 or newer installed on your system
and accessible in your PATH or by setting JAVA_HOME
Below is environment variables on Linux. when I try to install JDK 1.6 I'm getting forllowing error.
do I need to add environment variable before installing JDK ? In windows it will automatically add to path variable while installing. how to fix above problem?
environment variables on Linux server below.
HOSTNAME=lx-cphrobi-t49x
TERM=xterm
SHELL=/bin/bash
HISTSIZE=1000
SSH_CLIENT=10.172.18.240 62878 22
OLDPWD=/opt/oinstall/software
SSH_TTY=/dev/pts/0
USER=hrobi
LS_COLORS=no=00:fi=00:di=00;34:ln=00;36:pi=40;33:so=00;35:bd=40;33;01:cd=40;33;01:or= 01;05;37;41:mi=01;05;37;41:ex=00;32:*.cmd=00;32:*.exe=00;32:*.com=00;32:*.btm=00;32:* .bat=00;32:*.sh=00;32:*.csh=00;32:*.tar=00;31:*.tgz=00;31:*.arj=00;31:*.taz=00;31:*.l zh=00;31:*.zip=00;31:*.z=00;31:*.Z=00;31:*.gz=00;31:*.bz2=00;31:*.bz=00;31:*.tz=00;31 :*.rpm=00;31:*.cpio=00;31:*.jpg=00;35:*.gif=00;35:*.bmp=00;35:*.xbm=00;35:*.xpm=00;35 :*.png=00;35:*.tif=00;35:
MAIL=/var/spool/mail/hrobi
PATH=/usr/bin:/bin:/usr/sbin:/sbin:/usr/share/centrifydc/bin:/usr/X11R6/bin:/home/hro bi/bin
INPUTRC=/etc/inputrc
PWD=/opt/oinstall/software/Java
LANG=en_US.UTF-8
SSH_ASKPASS=/usr/libexec/openssh/gnome-ssh-askpass
SHLVL=1
HOME=/home/hrobi
LOGNAME=hrobi
CVS_RSH=ssh
SSH_CONNECTION=10.172.18.240 62878 10.179.8.117 22
LESSOPEN=|/usr/bin/lesspipe.sh %s
G_BROKEN_FILENAMES=1
_=/usr/bin/env

Answer 1

When you installing Java on Linux, installable should not ask for JAVA_HOME as you mentioned "Please ensure that you have Java 6 or newer installed on your system and accessible in your PATH or by setting JAVA_HOME "
Check this link for more info, it suppose to be as good as Windows
http://docs.oracle.com/javase/7/docs/webnotes/install/linux/linux-jdk.html