How to calculate & return highestmonth and lowestmonth as string in interactions tab?

Trying to create a getHightestMonth out of the Arrays made and return the string of the month for the highest number listed in the array.

Code java:

<   public class RainFall
   {  
   // Instance variable
      private String[] monthNames = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"};
      private double[] values;
 
   // Constructor method
      public RainFall()
      {
         // Nothing to do yet, but good practice to always include a
         // no-argument constructor method
      }
 
   // Overloaded Constructor method - accepts an array of doubles
      public RainFall(double [] newArray)
      {
         values = new double [newArray.length];
 
         for(int i = 0; i < values.length; i++) {
            values[i] = newArray[i]; 
         }
 
 
      }
 
   // Adds up and return the total of the values in the array numbers
      public double getTotal()
      {
         double total = 0.0;
 
         for (double val : values)
         {
            total += val;
         }
 
         return total;
      }
 
   // Return the mean (average) of the values in array numbers
      public double getAverage()
      {
         double average = 0.0;
         average = getTotal() / values.length;
 
         return average;
      }
 
   // Return the Highest Month
      public String getHighestMonth()
      {
         String hiMonth = ""; 
 
         return hiMonth;
      }
 
   // Return the Lowest Month
      public String getLowestMonth()
      {
         String loMonth = "";
 
         return loMonth;
      }  
   }>