Collection集合與數組間的轉換

1、集合-->數組：toArray（）

Collection coll = new ArrayList();
coll.add(133);
coll.add(53);
		
Object[] array = coll.toArray();

2、數組-->集合：調用Arrays類的靜態方法asList()

List<String> list = Arrays.asList(new String[]{"as","wa"});
	
List list1 = Arrays.asList(new int[]{12,123});
System.out.println(list1.size()); //返回值為1
		
List list2 = Arrays.asList(new Integer[]{12,123});
System.out.println(list2.size()); //返回值為2