Anonymous class can be replaced with inner class

Reports anonymous classes.

Occasionally replacing anonymous classes with inner classes can lead to more readable and maintainable code. Some code standards discourage anonymous classes.

Example:

  class Example {
    public static void main(String[] args) {
      new Thread() {
        public void run() {
          work()
        }

        private void work() {}
      }.start();
    }
  }

After the quick-fix is applied:

  class Example {
    public static void main(String[] args) {
      new MyThread().start();
    }

    private static class MyThread extends Thread {
      public void run() {
        work();
      }

      private void work() {}
    }
  }

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.

AnonymousInnerClass

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 | Class structure

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