Instal sun java 1.5 jdk or jre and tomcat 5.5.25

[Pablo Augusto]

hello,

im new in at linux administration,
i have to install java (1.5 [jre or jdk] ) and tomcat 5.5.25

Can anyone help me? Any goot step-step guide?
I just try search at google bur not sucess.

Thanks in advanced