Assignment used as condition

Reports assignments that are used as a condition of an if, while, for, or do statement, or a conditional expression.

Although occasionally intended, this usage is confusing and may indicate a typo, for example, = instead of ==.

The quick-fix replaces = with ==.

Example:

  void update(String str, boolean empty) {
    // Warning: 'empty' is reassigned,
    // not compared to str.isEmpty()
    if (empty = str.isEmpty()) {
      ...
    }
  }

After the quick-fix is applied:

  void update(String str, boolean empty) {
    if (empty == str.isEmpty()) {
      ...
    }
  }

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.

AssignmentUsedAsCondition

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 | Assignment issues

Inspection ID: AssignmentUsedAsCondition

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 AssignmentUsedAsCondition

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