What is disadvantages of using Java code in JSP files?

In this example, I have share drawbacks of Java coding in JSP Java server pages files.

The major disadvantages of scriptlets are:

1. Reusability: you can’t reuse scriptlets.
2. Replaceability: you can’t make scriptlets abstract.
3. OO-ability: you can’t make use of inheritance/composition.
4. Debuggability: if scriptlet throws an exception halfway, all you get is a blank page
5. Testability: scriptlets are not unit-testable.
6. Maintainability: per saldo more time is needed to maintain mingled/cluttered/duplicated code logic.

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