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.

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

RecordCanBeClass

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Java | Code style issues

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

Availability

By default bundled with: IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,
Can be installed with plugin: Java, 241.18072

Last modified: 18 June 2024