Why does string rewrite hashcode in java

The hashcode of

Object is calculated based on the address, and the hashcode of String is calculated based on the internal char [].
mainly wants to ask why this method is overridden, and in which scenarios problems will occur if it is not rewritten

Java string hashcode
Mar.06,2021

basically all classes that might be used as keys for map should override hashcodewords! You should be surprised if you come across such a class without overriding equals and hashcode,.

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b32a0a-4d4ca.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b32a0a-4d4ca.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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