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There is a newer version: 8.6.0.37351

Correctly updating a static field from a non-static method is tricky to get right and could easily lead to bugs if there are multiple class instances and/or multiple threads in play. Ideally, static fields are only updated from synchronized static methods.

This rule raises an issue each time a static field is updated from a non-static method.

Noncompliant Code Example

public class MyClass {

  private static int count = 0;

  public void doSomething() {
    //...
    count++;  // Noncompliant
  }
}