[HOWTO] Install Java 7 on Ubuntu 12.04

I'm not sure if this is in the right spot (if not I apologize), but I figure it is because this relates directly to building Android.

When I upgraded to Ubuntu 12.04, all the sudden I couldn't install Java (sha256sum mismatch jdk-7u3-linux-x64.tar.gz), which means I can't do much deving. Well I searched through the interweb and finally found a solution.

First:

Code:
sudo add-apt-repository ppa:eugenesan/java sudo apt-get update sudo apt-get install oracle-java7-installer

By now, you have probably gotten an error and the terminal has stated that Java was not installed. No problem.

Second:

Download Java directly from Oracle:

Now, move what you just downloaded to /var/cache/oracle-java7-installer/

Third:

Code:
sudo gedit /var/lib/dpkg/info/oracle-java7-installer.postinst

Now scroll down and find the following:

Code:
echo "Downloading..." rm -f $FILENAME WGETRC=wgetrc wget $PARTNER_URL \ || fp_exit_with_error "download failed" rm -f wgetrc echo "Download done."

Now put a # next to each line between "Downloading..." and "Downloading done."

Code:
echo "Downloading..." #rm -f $FILENAME #WGETRC=wgetrc wget $PARTNER_URL \ #|| fp_exit_with_error "download failed" #rm -f wgetrc echo "Download done."

Save, and go back to your terminal.

Finally, do:

Code:
sudo apt-get install oracle-java7-installer

Java should now install properly.

Source:

(most helpful info is in the comments)

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