高手来看一下 关于一个final的有关问题

import java.util.ArrayList;import java.util.List;public class FinalTest{    public static void main(String[] args)    {        FilledList<CoutInt> foo = new FilledList<CoutInt>(CoutInt.class);        System.out.println(foo.create(14));    }} class CoutInt{    private static int a;    private final int b = a++;    @Override    public String toString()    {        return Integer.toString(b);    }    }class FilledList<T> {    private Class<T> classtype;    public FilledList(Class<T> type)    {        this.classtype = type;    }    public List<T> create(int Elements)    {        List<T> result =  new ArrayList<T>();    try{        for(int i=0;i<Elements;i++)        {            result.add(classtype.newInstance());        }       }catch(Exception ex)       {           throw new RuntimeException();       }        return result;    }        }