Java On Centos With Red5

dear , experts
after googling for last 3 months i have installed Java on my centOS , but there is plenty of errors and by mistake i have delete some files . however i am trying to give it a new install . can you guys please provide me few information how can remove existing Java and have clean install of Java  jdk-1_6_0 in my centOS box . please provide me step by setp link if you have any , along with jdk-1_6_0 downloading Url i had a look at suns website couldnt find the link to download jdk-1_6_0 ,

i will appreciate if you guys can provide me extra info about installing red5 on centos .

thanks

regards
Niz