How does Java compare whether an object has been modified through the hash algorithm?

Java uses the hash value to determine whether the object has been modified through the hash algorithm. According to the public information related to the query, use the string.GetHashCode() method to serialize the user object into a string. Use the string.GetHashCode() method to obtain the hash value of the string. This can be determined when the user clicks the save button to save the data. Whether the object is modified.

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