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Record can be converted to class

Reports record classes and suggests converting them to ordinary classes.

This inspection makes it possible to move a Java record to a codebase using an earlier Java version by applying the quick-fix to this record.

Note that the resulting class is not completely equivalent to the original record:

  • The resulting class no longer extends java.lang.Record, so instanceof Record returns false.

  • Reflection methods like Class.isRecord() and Class.getRecordComponents() produce different results.

  • The generated hashCode() implementation may produce a different result because the formula to calculate record hashCode is deliberately not specified.

  • Record serialization mechanism differs from that of an ordinary class. Refer to Java Object Serialization Specification for details.

Example:

record Point(int x, int y) {}

After the quick-fix is applied:

final class Point { private final int x; private final int y; Point(int x, int y) { this.x = x; this.y = y; } public int x() { return x; } public int y() { return y; } @Override public boolean equals(Object obj) { if (obj == this) return true; if (obj == null || obj.getClass() != this.getClass()) return false; var that = (Point)obj; return this.x == that.x && this.y == that.y; } @Override public int hashCode() { return Objects.hash(x, y); } @Override public String toString() { return "Point[" + "x=" + x + ", " + "y=" + y + ']'; } }

This inspection depends on the Java feature 'Records' which is available since Java 16.

New in 2020.3

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.16690

Last modified: 29 April 2024