使用Iterator，removeCollection元素

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

public class RemoveUseIterator {

public static void main(String[] args) {
    // TODO Auto-generated method stub
    ArrayList aList = new ArrayList();
        aList.add("1");
        aList.add("2");
        aList.add("3");
        aList.add("4");
        aList.add("5");
       
       
        System.out.println("ArrayList before removal : ");
        for(int i=0; i< aList.size(); i++)
          System.out.println(aList.get(i));
         
        Iterator itr = aList.iterator();
       
        String strElement = "";
        while(itr.hasNext()){
          strElement = (String)itr.next();
          if(strElement.equals("2"))
          {
            itr.remove();
            break;
          }
        }
       
        System.out.println("ArrayList after removal : ");
        for(int i=0; i< aList.size(); i++)
          System.out.println(aList.get(i));
}

}
Console：
ArrayList before removal :
1
2
3
4
5
ArrayList after removal :
1
3
4
5