How can I add all 3 lists of object into one? Given the first and the third one can be empty? There ...

# announcements

[KayCee]

How can I add all 3 lists of object into one? Given the first and the third one can be empty? There ain't something like listA.addAll(listB).addAll(listC) 🤔

[deactivateduser]

something like this maybe? https://pl.kotl.in/OWnRyCccA

[KayCee]

ah great! 😆

[Nir]

Err i don't understand the relationship between the question and answer

[Nir]

since the question is 3 lists

[Nir]

and the answer involves a map

[Nir]

but you can just do listA + listB + listC

[KayCee]

just read a paper, there are 4 ways: plus operator, addAll, java stream 😋