Ubuntu-Setting the PATH variable for Java

:~$ sudo gedit /etc/profile
[sudo] password for Admin:   // enter admin password

Then Gedit will open with something like

# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))
# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).

if [ -d /etc/profile.d ]; then
 for i in /etc/profile.d/*.sh; do
   if [ -r $i ]; then
     . $i
   fi
 done
 unset i
fi
# $$$$$$$$$$$$$$$ copy to here $$$$$$$$$$$$$

Append this to end of the file

PATH=/*$$$$full path to bin here (eg:/home/srinath/myJava/jdk1.6.0_03/bin)$$$$$*/ :${PATH}
export PATH
JAVA_HOME=/*$$$$full path to bin here (eg:/home/srinath/myJava/jdk1.6.0_03/bin)$$$$$*/
export JAVA_HOME

Finally it will look like this.

# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))
# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).

if [ -d /etc/profile.d ]; then
 for i in /etc/profile.d/*.sh; do
   if [ -r $i ]; then
     . $i
   fi
 done
 unset i
fi

if [ "$PS1" ]; then
 if [ "$BASH" ]; then
   PS1='\u@\h:\w\$ '
   if [ -f /etc/bash.bashrc ]; then
 . /etc/bash.bashrc
   fi
 else
   if [ "`id -u`" -eq 0 ]; then
     PS1='# '
   else
     PS1='$ '
   fi
 fi
fi


PATH=/home/srinath/myJava/jdk1.6.0_03/bin:${PATH}
export PATH
JAVA_HOME=/home/srinath/myJava/jdk1.6.0_03/bin
export JAVA_HOME


umask 022

Now save.This is global, and affect all users.
Logout & Login, then try java -version

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Ubuntu-Setting the PATH variable for Java