Why newInstance instead of a constructor?

Question

Java

In books I met such an approach, instead of a constructor, a static method is used that returns an instance of the class.

class Class1 {

    public static Class1 newInstance() {
        return new Class1();
    }

}

I suspect this is some kind of design pattern? Why do this? What does such an approach give?
Recommend an intelligent book on this issue (but not with a crazy woman on the cover).

Answer 1

In your example, you have a defective singleton
Pattern Book - Gang of Four