Java: Programatic Way to Determine Current Windows User

I see many similar questions, however I want to find the Username of the currently logged in user using Java.

Its probably something like:

System.getProperty(current.user);

But, I'm not quite sure.

From stackoverflow jjnguy

• You're actually really close. This is what you're looking for:

  System.getProperty("user.name")
  

  From Chris Bunch

• The commonly available system properties are documented in the System.getProperties() method.

  As Chris said "user.name" is the property to get the user running your app.

  From John Meagher