user1621988 questions

• Howto save HashSet<String> to .txt?
• How to check if a Point is inside a Polygon
• How to make GNU-Screen share 1 Screen for all Users?
• HashMap<String, Object> How to replace 1 value of the Object?
• Shell GNU-Screen -X Stuff problems
• Enable/Disable tasks in Crontab by Bash/Shell
• Count how many HashMap entries have a given value
• How to Iterate over a Set/HashSet without an Iterator?

user1621988 answers