代码如下所示

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


public class Test{

    public static void main(String[] args){
        Collection c = new ArrayList();

        c.add("A");
        c.add("B");
        c.add("C");

        for(Iterator i = c.iterator(); i.hasNext();)
            System.out.println(i.next());

        System.out.println("");
        c.remove(1);
        c.remove(0);

        for(Iterator i = c.iterator(); i.hasNext();)
            System.out.println(i.next());



    }   
}

输出是

A
B
C

A
B
C

但输出应该是

A
B
C

C