Redundant type cast

Reports unnecessary cast expressions.

Example:

  static Object toObject(String s) {
    return (Object) s;
  }

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.

-RedundantCast

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 | Verbose or redundant code constructs

Use the checkbox below to ignore clarifying casts e.g., casts in collection calls where Object is expected:

  static void removeFromList(List<String> l, Object o) {
    l.remove((String)o);
  } 

Inspection options

Here you can find the description of settings available for the Redundant type cast inspection, and the reference of their default values.

Ignore clarifying casts: Default value:
Selected

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 -RedundantCast

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