Too weak variable type leads to unnecessary cast

Reports type casts that can be removed if the variable type is narrowed to the cast type.

Example:

  Object x = "  string  ";
  System.out.println(((String)x).trim());

Here, changing the type of x to String makes the cast redundant. The suggested quick-fix updates the variable type and removes all redundant casts on that variable:

  String x = "  string  ";
  System.out.println(x.trim());

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.

CastCanBeRemovedNarrowingVariableType

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

New in 2018.2

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