File list (Check if you may need any files):
chapter1\.classpath
........\.project
........\Comparable.class
........\Comparable.java
........\FlexSorter.class
........\FlexSorter.java
........\Inventory.class
........\Inventory.java
........\InventoryItem.class
........\InventoryItem.java
........\Invoice.class
........\Invoice.java
........\InvoiceItem.class
........\InvoiceItem.java
........\Item.class
........\Item.java
........\ItemComparer.class
........\ItemComparer.java
........\List.class
........\List.java
........\MainFrame$1.class
........\MainFrame$2.class
........\MainFrame$3.class
........\MainFrame$4.class
........\MainFrame.class
........\MainFrame.java
........\SortedList.class
........\SortedList.java
........\Util.class
........\Util.java
........\存货单.jpg
........\提货单.jpg
........\bin
chapter1
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