数组和集合之间的相互转化

String[] arrags = {"hello", "world", "java", "zhiyin"};
//数组转换为集合
List<String> list = new ArrayList<>(Arrays.asList(arrags));
for (String s : list) {

}
System.out.println();
//集合变为数组
String[] array = list.toArray(new String[list.size()]);