Explicit class declaration can be converted into implicitly declared class

Reports ordinary classes, which can be converted into implicitly declared classes

Example:

  public class Sample {
      public static void main(String[] args) {
          System.out.println("Hello, world!");
      }
  }

After the quick-fix is applied:

  public static void main(String[] args) {
      System.out.println("Hello, world!");
  }

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.

ExplicitToImplicitClassMigration

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.

This inspection depends on the Java feature 'Implicitly declared classes', which is available since Java 21-preview.

New in 2024.1

Inspection Details
By default bundled with:	IntelliJ IDEA 2024.2, Qodana for JVM 2024.2,
Can be installed with plugin:	Java, 242.22892

Last modified: 11 September 2024