list特殊场景使用的方法

	public static void main(String[] args) {
		
		String [] aa = {"1","2","3","4","5"};   
		
		//向list批量注入值
		List<String> list =  Arrays.asList("1", "2", "3", "4", "5");
		
		//数组转list
		list =  Arrays.asList(aa);
		for (String string : list) {
			System.out.println("list:"+string);
		}
		
		//打乱 list 集合元素的顺序（乱序）
		Collections.shuffle(list);
		for (String string : list) {
			System.out.println("list2:"+string);
		}
		
		//list 转数组
		int size = list.size();  
		String[] arr = (String[])list.toArray(new String[size]);
		System.out.println(Arrays.toString(arr));
	}

java的Arrays类的应用 http://blog.sina.com.cn/s/blog_93daad41010115yq.html
Apache下的ArrayUtils工具类总结https://www.cnblogs.com/jxgo/p/7421307.html

Java List与数组之间的转换http://blog.csdn.net/kingzone_2008/article/details/8444678