返回一个整数数组中最大子数组的和

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

public class number {
    public static void main(String[] args){
        List<Integer> list = new ArrayList<>();
        int sum = Integer.MIN_VALUE;
        int i,max = sum;
        Random random = new Random();
        int length = random.nextInt(5);
        for (i = 0;i < length; i++){
            list.add(random.nextBoolean()?random.nextInt(10):random.nextInt(10) * (-1));
        }
        for (i = 0;i < length; i++){
            System.out.print(list.get(i).intValue()+"   ");
        }
        System.out.println();
        for (i = 0; i < length; i++){
            if (sum < 0){
                sum = list.get(i).intValue();
            }else {
                sum += list.get(i).intValue();
            }
            if (max < sum){
                max = sum;
            }
        }
        System.out.println(max);
    }
}