install jdk

[will@tootingbec ~]$ sudo yaourt -S jdk 8u25-1
[sudo] password for will:
==> WARNING: Building package as root is dangerous.
 Please run yaourt as a non-privileged user.
error: target not found: 8u25-1
[will@tootingbec ~]$ yaourt -S jdk 8u25-1
error: target not found: 8u25-1
[will@tootingbec ~]$ yaourt -S 'jdk 8u25-1'
error: target not found: jdk 8u25-1
[will@tootingbec ~]$ yaourt --help
Usage: yaourt <operation> [...]
operations:
	yaourt (search pattern|package file)
	yaourt {-h --help}
	yaourt {-V --version}
	yaourt {-Q --query}       [options] [package(s)]
	yaourt {-R --remove}      [options] <package(s)>
	yaourt {-S --sync}        [options] [package(s)]
	yaourt {-U --upgrade}     [options] <package(s)>
	yaourt {-C --clean}       [options]
	yaourt {-B --backup}      [save directory|restore file]
	yaourt {-G --getpkgbuild} [options] <package(s)>
	yaourt {--stats}
[will@tootingbec ~]$ yaourt -Q jdk
[will@tootingbec ~]$ sudo pacman -U jdk-7u2-1-i686.pkg.tar.xz
[sudo] password for will:
Sorry, try again.
[sudo] password for will:
loading packages...
error: 'jdk-7u2-1-i686.pkg.tar.xz': could not find or read package
[will@tootingbec ~]$ sudo pacman -U jdk-7u2-1-i686.pkg.tar.xz