Contract issues

Reports issues in method @Contract annotations. The types of issues that can be reported are:

Errors in contract syntax
Contracts that do not conform to the method signature (wrong parameter count)
Method implementations that contradict the contract (e.g. return true when the contract says false)

Example:

  // method has no parameters, but contract expects 1
  @Contract("_ -> fail")
  void x() {
    throw new AssertionError();
  }

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.

Contract

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

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 Contract

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

IntelliJ IDEA 2025.2

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025