容器遍历

//遍历总结

List 遍历

for || for each || Iterator迭代器1 || Iterator迭代器2

遍历List方法一: 普通for循环

	for (int i = 0; i < list.size(); i++) {//list为集合对象名
			String temp = (String)list.get(i);
			System.out.println(temp);
	}		

遍历List方法二: 增强for循环(使用泛型!)

	for (String temp : list) {
			System.out.println(temp);
		}

遍历List方法三: 使用Iterator迭代器1

	for (Iterator iter = list.iterator(); iter.hasNext() ; ) {
			String temp = (String) iter.next();
			System.out.println(temp);
		}

遍历List方法四: 使用Iterator迭代器2

	Iterator iter = list.iterator();
			while (iter.hasNext()) {
			Object obj = iter.next(); 
			iter.remove();//如果要遍历时,删除集合中的元素,建议使用这种方式!
			System.out.println(obj);

Set 遍历

遍历Set方法一: 增强for循环

	for (String temp : set) {
		System.out.println(temp);		
}

遍历Set方法二: 使用Iterator迭代器

	for (Iterator iter = set.iterator(); iter.hasNext();) {
		String temp = (String) iter.next();
		System.out.println(temp);
}

Map 遍历

遍历Map 方法一:根据key获取value

	Map<Integer, Man> maps = new HashMap<Integer, Man>();
		Set<Integer> keySet = maps.KeySet();
		for (Integer id : keySet) {
			System.out.println(maps.get(id).name);
		}

遍历Map 方法二:使用entrySet

	Set<Entry<Integer, Man>> ss = maps.entrySet();
		for (Iterator iterator = ss.iterator(); iterator.hasNext();) {
			Entry.e = (Entry) iterator.next();
			System.out.println(e.getKey() + "--" + e.getValue());
		}