How to install *.bin and jdk in ubuntu

1. Down load jdk from http://www.oracle.com/technetwork/java/javase/downloads/index.html.
2. Install jdb*.bin in ubuntu:
   1) sudo chmod +x jdk*.bin;
   2) sudo ./jdk*.bin
3. Configure java:
   1) configure in profile
      All user will share the enivorment parameters, so it is not very safely.
      a. sudo gedit /etc/profile
      b. add follow configuration in the foot of the file:
             JAVA_HOME = /java/home
             CLASSPATH = .:$JAVA_HOME/lib
             PATH = $PATH:$JAVA_HOME/bin
             export JAVA_HOME
             export CLASSPATH
             export PATH
         Re log on.
    2) configure in bash.bashrc
       Only the created user can use this enivorment parameters.
       a. sudo gedit /etc/profile
       b. add follow configuration in the foot of the file:
             set JAVA_HOME = /java/home
             export JAVA_HOME
             CLASSPATH = .:$JAVA_HOME/lib
             export CLASSPATH
             PATH = $PATH:$JAVA_HOME/bin     
             export PATH
       Re log on.
Note: when configure enivorment parameters, key and value joined by '=', please make sure that no whitespace between key with '=' and no whitespace between '=' with value.