背包问题递归java

public boolean PackageProblem(int[] arr,int start,int targetLeft,int target)
    {
        if(arr.length==0) 
        {
            System.out.println("no Answer");
            return false;
        }
        if(start==arr.length)
        {
            int[] tempArr=new int[arr.length-1];
            System.arraycopy(arr, 1, tempArr, 0, arr.length-1);

            return PackageProblem(tempArr, 0, target, target);
        }
        else if(arr[start]>targetLeft)
        {
            return PackageProblem(arr, start+1, targetLeft, target);
        }
        else if(arr[start]==targetLeft)
        {
            System.out.println("yes has answer");
            return true;
        }
        else{
            return PackageProblem(arr, start+1, targetLeft-arr[start], target);
        }
        
    }

 

int[] arr={11,10,8,7,5,3};
int target=21;

但是这个数组要是从大到小排好的？

int[] arr={11,8,7,5,3,10};就不行