install latest java version on linux : I am trying to install latest version of java in my linux machine,but I am unable to do so.
  steps I followed 
    1. downloded latest java tar ball  
    2. copied into /usr/lib/jvm  and untar it.  
    3. adding in to environment variable  (export JAVA_HOME=/usr/lib/javm/jdk1.7.0_80 , export PATH=$PATH:$JAVA_HOME/bin)  
    4. when I try to change the default java version, the installed one is not coming ( $ update-alternatives –-config java )    

Could anyone help me to resolve this . I have followed many links, but nothing helps

  