Java get element in set 2016-08-02 01:47
There are a lot of ways to get one element from set. I do not recommend you to do this. If you need get one of them use List instead.
public class TestSet {
public static void main(String[] args) {
Set<String> setStr = new HashSet<>();
setStr.add("test1");
setStr.add("test2");
for (String target0 : setStr) {
System.out.println(target0);
break;
}
String target1 = (String) setStr.toArray()[0];
System.out.println(target1);
List<String> listStr = new ArrayList<>();
listStr.addAll(setStr);
String target2 = listStr.get(0);
System.out.println(target2);
String target3 = setStr.iterator().next();
System.out.println(target3);
}
}