java--list与数组相互转换

1.数组转list

(1)通过ArrayList的构造器

String[] strArray = new String[2];
ArrayList list = new ArrayList(Arrays.asList(strArray)) ;

(2)通过Collections.addAll(arrayList, strArray)方式转换  (比较高效，推荐使用)

ArrayList< String> arrayList = new ArrayList(strArray.length);
Collections.addAll(arrayList, strArray);

（3）使用流方式转换

String[] arrays = {"tom", "jack", "kate"};
List stringList= Stream.of(arrays).collect(Collectors.toList());

2.list转数组

String[] strs = list.toArray(new String[list.size()]);