數組，List，Set互相轉化

轉載：https://blog.csdn.net/my_precious/article/details/53010232

1. 數組轉化為List：

String[] strArray= new String[]{"Tom", "Bob", "Jane"};

List strList= Arrays.asList(strArray);
           

2. 數組轉Set

String[] strArray= new String[]{"Tom", "Bob", "Jane"};

Set<String> staffsSet = new HashSet<>(Arrays.asList(staffs));

staffsSet.add("Mary"); // ok

staffsSet.remove("Tom"); // ok
           

3. List轉Set

String[] staffs = new String[]{"Tom", "Bob", "Jane"};

List staffsList = Arrays.asList(staffs);

Set result = new HashSet(staffsList);
           

4. set轉List

String[] staffs = new String[]{"Tom", "Bob", "Jane"};

Set<String> staffsSet = new HashSet<>(Arrays.asList(staffs));

List<String> result = new ArrayList<>(staffsSet);