title: install Java on ubuntu 15.10
body: <p>I'm installing Java on Ubuntu 15.10
  when I typed <code>sudo add-apt-repository ppa:webupd8team/java</code>
  The result </p>
  
  <pre><code>Traceback (most recent call last):
    File "/usr/bin/add-apt-repository", line 95, in &lt;module&gt;
      sp = SoftwareProperties(options=options)
    File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 109, in __init__
      self.reload_sourceslist()
    File "/usr/lib/python3/dist-packages/softwareproperties/SoftwareProperties.py", line 599, in reload_sourceslist
      self.distro.get_sources(self.sourceslist)    
    File "/usr/lib/python3/dist-packages/aptsources/distro.py", line 89, in get_sources
      (self.id, self.codename))
  aptsources.distro.NoDistroTemplateException: Error: could not find a distribution template for Ubuntu/xenial
  </code></pre>
  
  <p>How to fix it? thank you</p>