How to create Instance from genericReturnType

Here I need to create an object of java.util.List<com.entity.User>, where I have java.util.List<com.entity.User> is available as string only.

demo class

class Demo {
    public List<User> allUser() {
        // some stuff
    }
}

In another class

Method method = null;
try {
         Class cls= Class.forName("Demo"); // fully qualified Name here for sure
         
         Method[] methods = cls.getMethods();
         for (Method _method:methods) {
             if(_method.getName().equals("allUser")) {
                method = _method;
                break;
             }
         }
    } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    if(method != null) {
            java.lang.reflect.Type genericReturnType = method.getGenericReturnType();
    }

Here I need to create an object of java.util.List<com.entity.User>, I only have genericReturnType = java.util.List<com.entity.User>

I tried

Class clazz = Class.forName(genericReturnType.getTypeName());

This returns java.lang.ClassNotFoundException

I want to create instance of java.util.List<com.entity.User>

the thing is that the method allUser can be anything and return type of method can be anything

stuff till Method genericReturnType seems fine. I need to create an object with the help of genericReturnType.

NOTE: consider that there is no any syntex error in code.

let me simplify this.

// I want to achive this
String clsName = "java.util.List<com.entity.User>";  // consider fully qualified name
Class cls = Class.forName(clsName); // from here I got error java.lang.ClassNotFoundException
Object clsInstance = (Object) cls.newInstance();

Thanks in advance.