import java.util.ArrayList;
import java.util.List;
import java.util.Comparator;
public class Main {
public static void main(String[] args) {
// setup
List<Integer> list = new ArrayList<Integer>();
list.add(4);
list.add(3);
// classic way
list.sort(new Comparator<Integer>() {
@Override
public int compare(Integer a, Integer b) {
return a - b;
}
});
System.out.println(list);
// lambda way, the shortest way
list.sort((a, b) -> a - b);
System.out.println(list);
}
}