difference between java built in classes and ADT

[Kenneth]

What is the difference between java built in classes such as java.util.*
and ADT implementations. Why would you ever need to implement
something that is already written for you?

k

 

[Hal Rosser]

Because we can.

What is the difference between java built in classes such as java.util.*
and ADT implementations. Why would you ever need to implement
something that is already written for you?

k

 

[Kenneth]

Because we can.

So they're just options?

 

[Michael Borgwardt]

What is the difference between java built in classes such as java.util.*
and ADT implementations. Why would you ever need to implement
something that is already written for you?

Other implementations might be more efficient, have more features, or be superior
in some other way.

 

[Tony Morris]

What is the difference between java built in classes such as java.util.*
and ADT implementations. Why would you ever need to implement
something that is already written for you?

k

The core collections classes are implementations of ADTs.
Some argue that they are not as good as they should be - so they rewrite
them.
Others rewrite them as a learning exercise, such as a student at a tertiary
institution.