package testproject;

import java.util.ArrayList;
import java.util.List;

public class AutoBoxing {

    public static void main(final String[] args) {
        long start, end;
        // Using autoboxing
        final List<Integer> intList = new ArrayList<Integer>();
        for (int i = 0; i < 1E7; i++) {
            intList.add(Integer.valueOf(i));
        }
        final List<Integer> list2 = new ArrayList<Integer>();
        final List<Integer> list3 = new ArrayList<Integer>();

        start = System.currentTimeMillis();
        for (int i = 0; i < 1E7; i++) {
            final int val = intList.get(i);
            list2.add(val);
        }
        end = System.currentTimeMillis();
        System.out.println("Time with autoboxing: " + (end - start));

        start = System.currentTimeMillis();
        for (int i = 0; i < 1E7; i++) {
            final Integer val = intList.get(i);
            list3.add(val);
        }
        end = System.currentTimeMillis();
        System.out.println("Time without autoboxing: " + (end - start));

    }
}