When defining classes for a simple aggregation of values, Java developers have traditionally relied on constructors, accessors, equals(), hashCode() and toString(), an error-prone practice that has low value and shifts the focus away from modeling immutable data. Java records were introduced as a first preview in JDK 14 in order to simplify how we write data carrier classes. The second preview came in JDK 15 and the finalized feature arrived in JDK 16. A summary...

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