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Is there available a proven Java Pair class implementation?
I mean readily available, widely accepted and tested, maybe part of a more extensive library such as Apache Commons or Guava.
Yes, have a look at Apache Commons
Pair.Use sparingly, if at all;
leftandrightdoesn’t really convey anything about the content or relation between the elements.(The
Pairclass was deliberately left out of the standard Java API.)