Make a Simple GUI and Displaying Serial Arduino data got NullPointerException

anwar05 · November 22, 2021, 11:11am

Hello @RichardDL, when I run my program an error occurs on line 116, where the error is null pointer exception.
how do i print the data length?, and after i print it, i have to make sure the data is 7 using If (data.length >=7) ?

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Make a Simple GUI and Displaying Serial Arduino data got NullPointerException

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