What is the lifetime of unassigned object created in a constructor in java?

Question

I have a class(A) with constructor defined as shown below. In the constructor, I have created an object for B by passing a listener(interface) implementation to it as shown below.

public class A {

    private String str;

    public A() {

       new B(new OnStringUpdatedListener() {

           public void onStringUpdated(String str) {
               A.this.str = str;
           }

       });
    }
}

In the above code object of B is not assigned to any field of A or a variable in constructor.

Is it marked for garbage collection as soon as constructor execution completed or is it still alive since it registered a listener which modifies A's field.

Answer 1

@Thomas' comment is nice.

It doesn't matter what OnStringUpdatedListener modifies. After constructor has been executed, B won't be accessible through any references. It will become eligible for the GC and may be garbage-collected.