What could be a bad example of inheritance in Java?

Question

I know the advantages of inheritance in Java, but it’s a little difficult for me to admit that it also has disadvantages. Can someone give me a bad example of inheritance in Java?

Answer 1

• Stack extends Vector. The stack is not a vector.
• Properties extends Hashtable. The property table is not a hash table.

See this answer for a quote from Effective Java.

It was easy to write an implementation Stackusing what was already implemented in Vector(similar to Properties), but it created problems - see here

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