java syntax like Object(){}

Question

Class clazz = new Object(){}.getClass();

Why is this possible and what would it mean? Could someone please remind me?

For example:

public class Testing {
    public static void main(String[] args) {
        Class clazz = new Object(){}.getClass();
        System.out.println(clazz);
    }
}

The result is: class Testing$1

Answer 1

new Object(){} creates an anonymous inner class, as a subclass of Object. It is an inner class of Testing, thus it gets a compiler generated name like the one you saw.