迭代器應用：

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

public class Test_1 {

	public Test_1() {
		// TODO Auto-generated constructor stub
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		List l = new ArrayList();
		l.add("aa");
		l.add("bb");
		l.add("cc");
		for (Iterator i = l.iterator(); i.hasNext();) {
			String str = (String) i.next();
			System.out.println(str);

		}
		System.out.print("\n");
		Iterator it = l.iterator();
		while (it.hasNext()) {
			String str = (String) it.next();
			System.out.println(str);

		}

	}// ///main

}
/////////////
//aa
//bb
//cc
//
//aa
//bb
//cc
//