There is absolutely no problem with the SSD 3 Java program exercise 7. We have run it, passed the exam, and the teacher gives full marks

Exercise 7
..........\.classpath
..........\.project
..........\bin
..........\...\Catalog.class
..........\...\catalog.dat
..........\...\CatalogGUI$CatalogListListener.class
..........\...\CatalogGUI.class
..........\...\CatalogLoader.class
..........\...\Coffee.class
..........\...\CoffeeBrewer.class
..........\...\DataField.class
..........\...\DataFormatException.class
..........\...\FileCatalogLoader.class
..........\...\Product.class
..........\catalog.dat
..........\src
..........\...\CatalogGUI.java
..........\...\Coffee.java
..........\...\CoffeeBrewer.java
..........\...\Product.java

• We are an exchange download platform that only provides communication channels. The downloaded content comes from the internet. Except for download issues, please Google on your own.
• The downloaded content is provided for members to upload. If it unintentionally infringes on your copyright, please contact us.
• Please use Winrar for decompression tools
• If download fail, Try it againg or Feedback to us.
• If downloaded content did not match the introduction, Feedback to us，Confirm and will be refund.
• Before downloading, you can inquire through the uploaded person information

Nothing．