import java.util.ArrayList; import java.util.Collections; public class Main { public static void main(String[] args) { ArrayList<Integer> arrayList = new ArrayList<Integer>(); arrayList.add(new Integer("1")); arrayList.add(new Integer("2")); arrayList.add(new Integer("3")); arrayList.add(new Integer("4")); arrayList.add(new Integer("5")); Object obj = Collections.min(arrayList); System.out.println(obj); } }