Instantiate nested static class using Class.forName

Question

I have a nested static class like:

package a.b
public class TopClass {

    public static class InnerClass {
    }
}

I want to

Answer 1

Inner class is always accessed via dollar sign because when java compiler compile the java source code file it generates .class file(byte code).

if there is only one class for example Hello.java and this class is an outer class then java compiler on compilation generate Hello.class file but if this class has an inner class HelloInner then java compiler generates d Hello$HelloInner.class(byte code).

so bytecode always looks like for following snippet with name Outer.java:

   public class   Outer
   {
     public  var;//member variable
       Outer()//constructor
       {
        }
       class  Inner1
        {
          class Inner2
             {  
              }
         }
       }

so byte code is:Outer$Inner1$Inner2.class

that's why we use $ sign to access inner class .:)