Java - exécuté n'importe qui n'importe quel code pour les Expressions Lambda et les fonctions d'agrégation utilisées dedans ? -Débordement de pile

Can anyone share a complete running program having aggregate functions running with Lambda expressions ? I want to get an idea. I saw examples on google but they gave some errors, even when I am running them on Java 8.

Can anyone share a complete running program having aggregate functions running with Lambda expressions ? I want to get an idea. I saw examples on google but they gave some errors, even when I am running them on Java 8.

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