Can not solve the error please help(trapped rainwater problem)

[trail yoke]

Hey, @hallow raptor!
Please remember to /close this post once your question has been answered!

[hallow raptor]

public class array{
    public static int trappedrainwater(int height[])
    {
        int n=height.length;
        //calculating left max array
        int leftmax[]=new int [n];
        leftmax[0]=height[0];
        for(int i=1;i<n;i++)
        {
            leftmax[i]=Math.max(leftmax[i-1], height[i]);
        }
        //calclulating rightmax
        int rightmax[]=new int[n];
        rightmax[n-1]=height[n-1];
        for(int i=n-2;i>=0;i--)
        {
            rightmax[i]=Math.max(rightmax[i+1],height[i]);
        }
        int trappedwater=0;
        for(int i=0;i<=n;i++)
        {
            int waterlevel=Math.min(leftmax[i],rightmax[i]);
            trappedwater+=(waterlevel-height[i]);
        }
        
        return trappedwater;
    }
    public static void main(String args[])
    {
        int height[]={4,2,0,6,3,2,5};
        System.out.print(trappedrainwater(height));
       
    }
}```