Reports an object that uses a private or protected field of another object.

Java allows using such fields for objects of the same class as the current object but some coding styles discourage this use. Additionally, such direct access to private fields may fail in component-oriented architectures, such as Spring or Hibernate, that expect all access to other objects to be through method calls so the framework can mediate access using proxies.

Example:


public class Base {
    protected int bar;

    class Inside {
        int f(Base base) {
            return base.bar;  // warning: direct access to non-public field
        }
    }
}

class SomewhereElse {
    void m(Base base) {
        base.bar = 1; // warning: direct access to non-public field
    }
}

Configure the inspection: