The signature of equals() from Object class is 'public boolean equals(Object object)' : equals method « Utility Classes « SCJP

1. SCJP
2. Utility Classes
3. equals method

public class MainClass {
  public static void main(String[] argv) {

    MyClass myClass = new MyClass();

    MainClass mainClass = new MainClass();

    System.out.println(myClass.equals(mainClass));
  }
}

class MyClass {
  public boolean equals(Object object) {
    if (object instanceof MyClass == false) {
      return false;
    }
    return true;
  }
}

false