Copy constructor misses field

Reports copy constructors that don't copy all the fields of the class.

final fields with initializers and transient fields are considered unnecessary to copy.

Example:

  class Point {

    private int x;
    private int y;

    Point(int x, int y) {
      this.x = x;
      this.y = y;
    }

    Point(Point other) {
      // fields x and y are not initialized
    }
  }

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.

CopyConstructorMissesField

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 | Probable bugs

New in 2018.1

Inspection ID: CopyConstructorMissesField

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection CopyConstructorMissesField

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.3

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.3, Qodana for JVM 2025.3,

Last modified: 03 December 2025