Ansible playbook to install Java automatically on Debian. I'm pretty sure you have to read and accept the java license before installing this. Using apt module surely is better but it requires to have python-apt installed.

install_java.yml

- name: Java install
  hosts: do
  user: root
  tasks:
  - name: Create java repo list
    action: shell echo 'deb http://ppa.launchpad.net/webupd8team/java/ubuntu precise main' >/etc/apt/sources.list.d/java.list
  - name: Add repo key
    action: command apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EEA14886
  - name: Accept java license
    action: shell echo 'oracle-java7-installer shared/accepted-oracle-license-v1-1 select true' | debconf-set-selections
  - name: Update
    action: command apt-get update -y
  - name: Install java 7
    action: command apt-get install oracle-java7-set-default -y