List转Set

List转Set

List<String> myList = new ArrayList()<String>;
myList.add("1");
myList.add("1");
Set result = new HashSet(myList);

Set转List

String[] str = new String[]{"Tom", "Bob", "Jane"};
Set<String> set = new HashSet<>(Arrays.asList(str));
 
List<String> result = new ArrayList<>(set);

数组转List

String[] str = new String[]{"Tom", "Bob", "Jane"};
List list = Arrays.asList(str);

数组转Set

String[] str = new String[]{"Tom", "Bob", "Jane"};
Set<String> set = new HashSet<>(Arrays.asList(str));

List转数组

String[] str = new String[]{"Tom", "Bob", "Jane"};
List list = Arrays.asList(str);
 
Object[] result = list.toArray();

Set转数组

String[] str = new String[]{"Tom", "Bob", "Jane"};
Set<String> set = new HashSet<>(Arrays.asList(str));
 
Object[] result = set.toArray();