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  • When writing your own class, the hashcode method should not be based on the identity of the object - it should be based on the content stored within. Commented Sep 8, 2015 at 6:05
  • Can you explain what is identity of the object Commented Sep 8, 2015 at 6:28
  • @wanghao The identity is the memory address (reference). Commented Sep 9, 2015 at 0:36