how to set the total for each category from each room in my code?

[hrensimin05]

import java.util.*;
public class flooring
{ public static void main(String[]args)
     {Scanner flo=new Scanner (System.in);
      int rooms=getroomnumber(flo,"How many rooms you are flooring: ");
      for(int i=1;i<=rooms;i++)
          { System.out.println("Room number: " + i + "\n"); 
     int lenght=getnumbers(flo,"Enter lenght of room(ft):" );
      int width=getnumbers(flo,"Enter width of room(ft):" );
      int costfloor=getnumbers(flo,"Enter cost of flooring($ per square foot):");  
      int area=getarea(lenght, width);
      double hourlabor=gethourlabor(area);
      int carton=getcarton(area);
      double costflooring=getcostflooring(costfloor, carton);
      double laborcost= getlaborcost( hourlabor);
      double costsupplies=getcostsupplies(laborcost);
      draw();
      double totalcost=gettotal(laborcost, costsupplies, costflooring);
        for (double j=1;j<=rooms;j++) 
         {double totalhour=+hourlabor;
 
 
      System.out.println("Total hours of labor: " + totalhour );
            System.out.println("Total number of cartons: ");
            System.out.println("Total cost of flooring: $");
            System.out.println("Total cost of supplies: $");
            System.out.println("Total labor cost: $");
            System.out.println("Final cost: $");}
 
 
 
    }}
   public static int getroomnumber(Scanner flo, String s )
    {int rooms;
    System.out.print(s);
    rooms=flo.nextInt();
    System.out.println();
         return rooms;
     }
 
    public static int getarea( int lenght, int width)
     { int area= lenght *width;
      return area;
      }
     public static double gethourlabor(int area)
  {  
     double hourlabor=(area/200)*3;
     System.out.println("Hours of labor required: " + hourlabor);
    return hourlabor;  
   }
 
   public static int getcarton(int area) 
  {  int carton=(int)(Math.ceil((double)area/12));
   System.out.println("Cartons of flooring needed: " + carton);
   return carton;
   }
  public static double getcostflooring(int costfloor,int carton)
   {
   double costflooring=(carton*12)*costfloor;
   System.out.println("Cost of the flooring: $" + costflooring);
   return costflooring;
   }
   public static double getlaborcost( double hourlabor)
   {double laborcost=hourlabor*40;
   System.out.println("Labor cost: $"  + laborcost);
   return laborcost;
   }
 
   public static double getcostsupplies( double laborcost)
    {double costsupplies = laborcost/5;
   System.out.println("Cost of supplies: $" + costsupplies); 
   return costsupplies;
   }
   public static void draw() 
    {for(int i=1;i<=19;i++)
      System.out.print("-");
      System.out.println();}
 
  public static double gettotal(double laborcost, double costsupplies , double costflooring)
   {double totalcost=laborcost + costsupplies + costflooring;
    System.out.println("Total cost: $" + totalcost);
    System.out.println(); 
    return totalcost;
  }
 
  public static int getnumbers( Scanner flo, String prompt)
  { int numbers;
   System.out.print(prompt);
   numbers=flo.nextInt(); 
   return numbers;
   }
}   
 
 

[chaarmann]

loop through all rooms.
Make a hashmap with key = category and value = grandTotal (which is initially 0) and add the total of the current room there while looping.
That means: At the beginning, this hashmap is empty. If the category of the current room does not exist in the map, add it to the map. Then always get the existing entry and add the current total to the grandTotal value there.

At the end, loop through all all keys (categories) of the hashmap and print out the grandTotal there.