How do I solve a cannot find symbol error?

I am attempting to get a program to organize restaurant ratings and such, but cannot find the symbol error listed in my second program. I think it's a declaration problem, but I'm struggling to find a solution. Below are the two programs. The error JGrasp is giving me is in line 7 of the second section of code which involves Array List.

import java.util.*;
class restaurant
{
int[][] ratings;
int row;
int col;
restaurant(int n,int y)
{
  row=n;
  col=y;
  ratings=new int[n][y];
  Random ran=new Random();
  for(int i=0;i<n;i++)
  {
     for(int j=0;j<y;j++)
     {
        ratings[i][j]=ran.nextInt(1,6);
     }
  }
}
public void printratings()
{
  System.out.println("Ratings of the restaurants over the years: Row: restaurants Column: Years");
  for(int i=0;i<row;i++)
  {
     System.out.print("restaurant "+(i+1)+": ");
     for(int j=0;j<col;j++)
     {
        System.out.print(ratings[i][j]+" ");
     }
     System.out.println();
  }
}
public ArrayList<Integer> func()
{
  ArrayList<Integer> temp=new ArrayList<Integer>();
  for(int i=0;i<row;i++)
  {
     boolean flag=false;
     for(int j=0;j<col;j++)
     {
        if(ratings[i][j]==5)
        {
           flag=true;
           break;
        }
     }
     if(flag==true)
     {
        temp.add(i);
     }
  }
  return temp;
}
public ArrayList<Double> average()
{
  ArrayList<Double> temp=new ArrayList<Double>();
  for(int i=0;i<row;i++)
  {
     double total=0;
     for(int j=0;j<col;j++)
     {
        total+=ratings[i][j];
     }
     total/=col;
     temp.add(total);
  }
  return temp;
}
public void printstar()
{
  for(int i=0;i<row;i++)
   {
     boolean flag=true;
     for(int j=0;j<col;j++)
        {
           if(ratings[i][j]<5)
           {
              flag=false;
              break;
           }
        }
     if(flag==true)
     {
        System.out.print(i+" ");
     }
  }
}
public boolean stars()
{
  for(int i=0;i<row;i++)
  {
     for(int j=0;j<col;j++)
     {
        if(ratings[i][j]==5)return true;
     }
  }
    return false;
}
}
   **Second Section of code starts here**

public class client
{
public static void main(String[] args)
{
  restaurant h=new restaurant(4,10);
  h.printratings();
  ArrayList<Double> temp=h.average(); **This line is my problem**
  System.out.println("Average Rating of all the restaurants: ");
  for(int i=0;i<temp.size();i++)
  {
     System.out.println("restaurant "+(i+1)+":"+" "+temp.get(i));
  }
    
 }
}