Java5 is REQUIRED by the android build system to compile.
sudo gedit /etc/apt/sources.list
add to the bottom of the file file
deb http://us.archive.ubuntu.com/ubuntu/ jaunty multiverse deb http://us.archive.ubuntu.com/ubuntu/ jaunty-updates multiverse
Save the file and exit
sudo apt-get update sudo apt-get install sun-java5-jdk sudo update-alternatives --config java
You may or may not need to select java5 if you already have 6 installed on that last prompt. Once that is completed remove the lines previously added.
sudo gedit /etc/apt/sources.list
When the file opens delete the below lines and save.
deb http://us.archive.ubuntu.com/ubuntu/ jaunty multiverse deb http://us.archive.ubuntu.com/ubuntu/ jaunty-updates multiverse