Number comparison using '==', instead of 'equals()'

Reports code that uses == or != instead of equals() to test for Number equality.

With auto-boxing, it is easy to make the mistake of comparing two instances of a wrapper type instead of two primitives, for example Integer instead of int.

Example:

  void foo(Integer a, Integer b) {
    final boolean bool = a == b;
  }

If a is known to be non-null, then it's safe to apply the "unsafe" quick-fix and get the result similar to the following:

  void foo(Integer a, Integer b) {
    final boolean bool = a.equals(b);
  }

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.

NumberEquality

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

Inspection Details
By default bundled with:	IntelliJ IDEA 2024.2, Qodana for JVM 2024.2,
Can be installed with plugin:	Java, 242.22892

Last modified: 11 September 2024