Define Bar Chart Class in Java Program

/*
Write a Java program to acomplish the following tasks  
1. Define a class BarChart in Java. 
2. Add an array of double in it
3. Define two constructors: no arg
   constructor to initialize with 0.0
   and parameterized constructor to initialize with 
   given array containing daily sales of 7 shops.
4. Define a method to show the sales
5. Define a method to print a bar chart of "==" 
   two equal sign characters, according to 7 sales of shops
6. Define a main class to use BarChart class in Java
 */
package salesbarchart;

import java.util.Arrays;

/**
 * @author www.EasyCodebook.com
 */
class BarChart{
    private double sales[]= new double[7];
    BarChart(){
       Arrays.fill(sales,0.0);
    }
    BarChart(double[] s){
        sales=s;
    }
    public void printBarChart(){
        int i,j,hyphen;
        System.out.println("Bar Chart of Sales on "+java.time.LocalDate.now());
        for(i=0;i<7;i++)
        {
            hyphen=(int)sales[i] / 100;
            System.out.print("Sales:Shop#:"+(i+1)+":  ");
            for(j=1;j<=hyphen;j++)
                System.out.print("==");
            System.out.println(" "+sales[i]);
            
        }
        
    }
}
public class SalesBarChart {

    public static void main(String[] args) {
      double arr[]={800.0,400.0,1500.0,100.0,1100.0,200.0,600.0};
      BarChart chart1=new BarChart(arr);
      chart1.printBarChart();
    }
}