用动态规划算法实现最大子数组问题的算法

public class maxContinuousSubarrayDP {
    public static void main(String[] args){
        int[] input = {1,-2,4,5,-2,8,3,-2,6,3,7,-1};
        int max = maxContinuousSubarrayDP(input, input.length);
        System.out.println("最大值和"+max);
    }

    private static int maxContinuousSubarrayDP(int[] X, int n){
        //初始化
        int[] D = new int[n];
        int[] Rec = new int[n];
        D[n-1] = X[n-1];
        Rec[n-1] = n-1;
        //动态规划
        //自底向上计算
        for(int i=n-2; i>=0; i--){
            //当后面的和大于0时
            if(D[i+1]>0){
                //记录子问题结果与决策
                D[i] = X[i] + D[i+1];
                Rec[i] = Rec[i+1];
            }
            //后面的数字和小于0
            else{
                D[i] = X[i];
                Rec[i] = i;
            }
        }
        //寻找解
        int sMax = D[0];
        for(int i=1; i<n; i++){
            if(sMax<D[i]){
                sMax = D[i];
                System.out.println("开始位置下标"+(i+1));
                System.out.println("结束位置下标"+Rec[i-1]+1);
            }
        }
        return sMax;
    }
}