public class OneTest {
public static void main(String[] args) {
// 构造Map数据
Map<String, String> map = new HashMap<String, String>();
map.put("ele1", "小樱");
map.put("ele2", "若曦");
map.put("ele3", "晴川");
Set<String> set = map.keySet();
// Set转List,方法一 : ArrayList(Collection<?> c)
List<String> list1 = new ArrayList<String>(set);
for (int i = 0; i < list1.size(); i++) {
System.out.println("list1(" + i + ") --> " + list1.get(i));
}
// Set转List,方法二:List实现类(ArrayList/LinkedList)的方法 -- addAll(Collection<?> c)
List<String> list2 = new ArrayList<String>();
list2.addAll(set);
for (String elem : list2) {
System.out.println(elem);
}
}
}