java倒序输出List

package com.tsubasa.collection;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;

public class ReversibleArrayList<T> extends ArrayList<T>{

    public ReversibleArrayList(Collection<T> c){
        super(c) ;
    }

    public Iterable<T> reversed(){
        return new Iterable<T>(){
            @Override
            public Iterator<T> iterator() {
                return new Iterator<T>(){
                    int current = size() -1 ;
                    @Override
                    public boolean hasNext() {
                       return current > -1 ;
                    }
                    @Override
                    public T next() {
                        return get(current--);
                    }
                    @Override
                    public void remove() {
                        throw new UnsupportedOperationException() ;
                    }
                } ;
            }
            
        } ;
    }
    
    public static void main(String[] args) {
        ReversibleArrayList<String> list = 
                new ReversibleArrayList<String>(
                        Arrays.asList("to be or not to be it is a question".split(" "))) ;
        
        for(String str : list){
            System.out.print(str + " ");
        }
        System.out.println();
        for(String str :list.reversed()){
            System.out.print(str + " ");
        }
    }
}