自动装箱/拆箱_JAVA_编程开发_程序员俱乐部

class="java" name="code">package cn.itcast.myeclipse;

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

public class Demo2 {

	public static void main(String[] args) {
		List list = new ArrayList();
		list.add(1);
		list.add(2);
		list.add(3);

		Iterator it = list.iterator();
		while (it.hasNext()) {
			int j = (Integer) it.next();
		}
	}