cannot find symbol
LewisSun (0)

im not sure what is that, i'm learning, it work on teacher's example, but mine says cannot find symbol... teacher is not here but I need to finish...(im using mac)

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mwilki7 (192)

You will need a Java Swing repl project in order to see the GUI elements of this program.
https://docs.oracle.com/javase/7/docs/api/javax/swing/JOptionPane.html

You should be able to create Java Swing projects on repl. If you want to paste your code to a new Java Swing project it should work granted the code works the way you want.