What is the significance of the `equals()` and `hashCode()` contract in Java?

Java Associate Hard

Java Associate — Hard

What is the significance of the `equals()` and `hashCode()` contract in Java?

Key points

  • `equals()` and `hashCode()` must be consistent to avoid issues with hash-based collections
  • Violating this contract can lead to unexpected behavior in Java collections
  • `hashCode()` is used to determine the bucket location in hash-based collections
  • `equals()` is used to check for actual equality between objects

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