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javacollectionsjunit4

Where is toString() overridden on java.util.List

I was wondering why this assert works in JUnit:

assertEquals("[String1, String2, String3]", Arrays.asList("String1", "String2", "String3").toString());

I can't see the toString() being overridden anywhere on List or Collection.

I'm glad it works, but, still curious.

Solution

  • Arrays.asList returns an Arrays#ArrayList that extends AbstractList which extends AbstractCollection which implements toString.