linux下java环境变量设置 视频

视频
下载jdk

新建终端
./jdk1.6.0xxxx- rpm .bin回车
rpm -ivh jdk1.6.0xxxx. rpm 回车
y同意其协议，回车
环境变量设置
vi /etc/profile（系统变量） 或是vi .bash_profile（修改用户的变量）

# /etc/profile
 
# System wide environment and startup programs, for login setup
# Functions and aliases go in /etc/bashrc
 
pathmunge () {
        if ! echo $PATH | /bin/egrep -q "(^|:)$1($|:)" ; then
           if [ "$2" = "after" ] ; then
              PATH=$PATH:$1
           else
              PATH=$1:$PATH
           fi
        fi
}
 
# ksh workaround
if [ -z "$EUID" -a -x /usr/bin/id ]; then
        EUID=`id -u`
        UID=`id -ru`
fi
 
# Path manipulation
if [ "$EUID" = "0" ]; then
        pathmunge /sbin
        pathmunge /usr/sbin
        pathmunge /usr/local/sbin
fi
 
# No core files by default
ulimit -S -c 0 > /dev/null 2>&1
 
if [ -x /usr/bin/id ]; then
        USER="`id -un`"
        LOGNAME=$USER
        MAIL="/ var /spool/mail/$USER"
fi
 
HOSTNAME=`/bin/hostname`
HISTSIZE=1000
 
if [ -z "$INPUTRC" -a ! -f "$HOME/.inputrc" ]; then
    INPUTRC=/etc/inputrc
fi
 
export PATH USER LOGNAME MAIL HOSTNAME HISTSIZE INPUTRC
 
for i in /etc/profile.d/*.sh ; do
    if [ -r "$i" ]; then
        . $i
    fi
done

JAVA_HOME=/usr/java/jdk1.6.0_03
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH
CLASSPATH=.:$JAVA_HOME/ lib /tools.jar
export CLASSPATH

unset i
unset pathmunge

注销，重新登录，ok
vi HelloWorld

public class HelloWorld{
  public static void main(String[] args){
    System.out.println("Hello World!~");
  }
}