hadoop and java installing -


i trying install java , hadoop

in cantos

but when logging 

'vi .bashrc`

and had enter these commands

export java_home=/usr/lib/jdk1.7.0_51  export path=$path:$java_home/bin  export hadoop_home=/usr/lib/hadoop-0.20.2-cdh3u  export path=$path:$hadoop_home/bin

after want check java version writing command

$ java -version

this message show me

bash: java: java command not found

what ???????????

help please

^_^

to reflect changes made in .bashrc have logout or restart system.


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