Windows: javac is not recognized as an internal or external command, operable program or batch file

Trabla: Windows: javac is not recognized as an internal or external command, operable program or batch file

Solving:

1. Find and copy path to JDK bin folder (java development kit)  in your system
e.g.
C:\Program Files\Java\jdk1.8.0_31\bin

2.  Goto Start->Control Panel->System

3. Click "Advance system Settings"

4. Click "Environment Variables..."

5. Find variable "Path" and click "Edit" button

6. Paste  path to JDK bin folder + semicolon into "Variable value" field
+ click OK

e.g.
C:\Program Files\Java\jdk1.8.0_31\bin;

7. Open new window cmd. Run your javac command