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It's better, I think, for the thread to remain for the benefit of others.

Basically what I'm suggesting is that you replace the whole do loop with a single assignment to the winner variable:



public static boolean checkWin()
{
boolean winner = ((grid[0][0] ==...

The program doesn't actually end. So evidently it gets into a never ending loop (with no output).



public static boolean checkWin()
{
boolean winner = false;
do
...