Loop executes zero or billions of times

Reports loops that cannot be completed without an index overflow or loops that don't loop at all. It usually happens because of a mistake in the update operation.

Example:

  void foo(int s) {
    for (int i = s; i > 12; i++) { // i-- should be here
      System.out.println(i);
    }
  }

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.

OverflowingLoopIndex

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 2019.1

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