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1. .In DrJava, right-click the {{GeneratePuzzleApp} class and select "Run File" to start the utility.
2. Select a file from the drop-list (yes, 4,txt is missing--broken link on the download page).   The higher the number, the harder the puzzles.
3. Each file contains about 10,000 puzzles.   Use the number spinner to choose or type a puzzle number from 1-10,000 (approx.).    Specifying "0" as the index will cause the utility to randomly select a puzzle.
4. Click the Generate button and the puzzle will appear in the main display area of the utility.  
5. Click the Save button to save the generated puzzle in a format that the Sudoku solver application can now read. 

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