匿名类的对象类型是什么

Question

Please look at the Java classes below:

 class A {
   public void doProcess(){
      System.out.println("Process from A class!");
   }
 }

---

 class B extends A {
   @Override
   public void doProcess(){
      System.out.println("Process from B class!");
   }
 }

I have 2 classes as shown above. If I were to do the below (an anonymous class)

 new B() {
   @Override
   public void doProcess(){
      System.out.println("Process from Anonymous class");
   }        
 }

Am I creating new subclass of B? Or is it an instance of B?

I know I could assign the anonymous implementation to either B or A. What I wasn't sure is on the instance of the anonymous class that's created. More curios on what Java does than for any practical purposes. I don't know how to get the class object of this anonymous inner class to use some reflection API and figure that out myself.

Answer 1

You are creating an instance of an anonymous sub-class of class B .

B b = new B() {
   @Override
   public void doProcess(){
      System.out.println("Process from Anonymous class");
   }        
}
System.out.println (b.getClass ().getSuperclass ());

This will print

class some.package.B

where some.package is the package where class B is located.