When should you use ? extends T? - Cracking the Java Coding Interview

Cracking the #Java #Coding #Interview - Question 91: When should you use ? extends T?

[MyCodingDiary]

Your enthusiasm for programming is contagious! It motivates me to keep learning.

[VuLinhAssassin]

Producer extends, consumer super, the PECS principle

[mmo]

This is the most useful thing in any application in any language

[onelastday]

Next question what is <? super T> mean 🤔

[ajaythombare]

These shorts are keeping me away from tutorial hell😅

[pavlg]

AFAIK, the Java Compiler names it a "Capture", a higher bound capture (? extends T) and a lower bound capture (? super T).

[Speiger]

Yeah and they are painful to deal with... Especially if you deal with autogenerated code...

[raeedtech]

But here I can see (? super T ) not (? extends T) What is the differences between them

[madskaddie]

I did not know that Type<Double> is a subtype of Type<? extends Number> . The semantics seem a little strange. thanks 👌

[yassineaitmalek]

i just have one question how many cups of coffee did you drink during this show it is already 91 and still counting 😂