I've tried installing Sun JDK from sudo add-apt-repository ppa:eugenesan/java, it failed with the following:

Downloading...

--2012-05-05 15:50:09--  http://download.oracle.com/otn-pub/java/jdk/7u3-b04/jdk-7u3-linux-x64.tar.gz

Resolving download.oracle.com (download.oracle.com)... 80.239.230.162

Connecting to download.oracle.com (download.oracle.com)|80.239.230.162|:80... connected.

HTTP request sent, awaiting response... 302 Moved Temporarily

Location: https://edelivery.oracle.com/otn-pub/java/jdk/7u3-b04/jdk-7u3-linux-x64.tar.gz [following]

--2012-05-05 15:50:09--  https://edelivery.oracle.com/otn-pub/java/jdk/7u3-b04/jdk-7u3-linux-x64.tar.gz

Resolving edelivery.oracle.com (edelivery.oracle.com)... 2.17.254.174

Connecting to edelivery.oracle.com (edelivery.oracle.com)|2.17.254.174|:443... connected.

HTTP request sent, awaiting response... 302 Moved Temporarily

Location: http://download.oracle.com/errors/download-fail-1505220.html [following]

--2012-05-05 15:50:09--  http://download.oracle.com/errors/download-fail-1505220.html

Connecting to download.oracle.com (download.oracle.com)|80.239.230.162|:80... connected.

HTTP request sent, awaiting response... 200 OK

Length: 5307 (5.2K) [text/html]

Saving to: `./jdk-7u3-linux-x64.tar.gz'



     0K .....                                                 100% 20.5M=0s



2012-05-05 15:50:09 (20.5 MB/s) - `./jdk-7u3-linux-x64.tar.gz' saved [5307/5307]



Download done.

sha256sum mismatch jdk-7u3-linux-x64.tar.gz

Oracle JDK 7 is NOT installed.

dpkg: error while cleaning up:

 subprocess installed post-installation script returned error exit status 1

Errors were encountered while processing:

 oracle-java7-installer

So apparently it's trying to fetch a bad URL. I've installed Java manually, but now the package is stuck as a half-installed and every time I apt-get install anything, the error appears again.

apt-get install -f shows "1 not fully installed or removed." package and fails with the same error. I've tried dpkg -P oracle-java7-installer, but it fails as well.

How to remove this half-installed package?