double[] unsortArray = new double[map.size()];
         double[] sortedArray = new double[constance_k];
                 
        
        for(int i = 1; i <= map.size(); i++)
        {
            unsortArray[i - 1]  = (double)map.get(i);
        }
 报错
 java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Double

求大神解释