a java installation quesiton from Lansing

[GreenLinux@R]

I am a student and just started using ubuntu last night and I love it. I need to install java 6 onto it. but I have got some problems.
see below and hope I can please get some inputs from you.

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You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
sun-java5-bin: Depends: sun-java5-jre (= 1.5.0-15-0ubuntu1) but it is not going to be installed
sun-java6-jdk: Depends: sun-java6-bin (= 6-06-0ubuntu1) but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

but when I run the suggested,
`apt-get -f install"

no luck

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:~$ apt-get -f install
E: Could not open lock file /var/lib/dpkg/lock - open (13 Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

[wolfger]

You need to use sudo:

sudo apt-get -f install

Hopefully that fixes things for you?

[GreenLinux@R]

I got it.

after running it, I selected I so, the problem fixed. Thanks.