Refactored code in GildedRose.java by creating helper methods#1
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The refactoring extracts the complex logic into focused, single-responsibility helper methods including
updateItemQuality(),updateBackstagePassesQuality(),handleExpiredItem(),increaseQualityIfPossible(),decreaseQualityIfPossible(), and item type identification methods (isAgedBrie(),isBackstagePasses(),isSulfuras()). This approach eliminates code duplication for quality bounds checking, makes the main method flow linear and easy to follow, and significantly improves maintainability for adding new item types in the future.