Java's insane overriding

// Java is insane.
// If you create an instance of SubClass, and call testMethod() on it,
// it will output "In the subclass".

public class SuperClass
{
    public void testMethod()
    {
        this.overriddenMethod();
    }

    public void overriddenMethod()
    {
        System.out.println("In the superclass");
    }
}

public class SubClass extends SuperClass
{
    public void overriddenMethod()
    {
        System.out.println("In the subclass");
    }
}