Danny King questions

• What is natural deduction used for outside of academia?
• Particular java regular expression
• Why is this an invalid Turing machine? [closed]
• MySQL 5-star rating datatype?
• JPopupMenu won't close if I click outside of it
• Current state of OpenCV hand gesture recognition?
• Java array assignment (multiple values)
• Convert .jar to an OSX executable?
• Run code for x seconds in Java?

Danny King answers