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Synchronization on 'getClass()'

Reports synchronization on a call to getClass().

If the class containing the synchronization is subclassed, the subclass will synchronize on a different class object. Usually the call to getClass() can be replaced with a class literal expression, for example String.class. An even better solution is synchronizing on a private static final lock object, access to which can be completely controlled.

Example:

synchronized(getClass()) {}

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.

SynchronizationOnGetClass
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 | Threading issues

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 SynchronizationOnGetClass

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

Inspection Details

By default bundled with:

IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025