What does `CompletableFuture.allOf()` return and what is required to collect results?

Java Professional Hard

Java Professional — Hard

What does `CompletableFuture.allOf()` return and what is required to collect results?

Key points

  • Results must be retrieved individually after allOf() completes
  • CompletableFuture.allOf() does not automatically return a list of results
  • It waits for all supplied futures to complete before completing itself

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