[Solved] Java on windows 10 ( javac not recognized as internal or external ..). When you try to run your java program you first open your command window and run this command (javac yourProgram.java) to compile it first. But you get this error message says: ('javac' is not recognized as an internal or external command, operable program or batch file. ) Eventually this solution for this problem is easy and simple. Hope this video making the fix for you .

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