Design an application for Stock Brocking Reconciliation

I want to write a program on Stock Brock/trading Reconciliation application. There is a stock brocking firm holdings traders/investors profile who have invested in various company’s stocks and taken number of shares.

Each stock having per second stock price.

 Investors buy number of share from particular company.
 Investor buy/sell shares basis on day calculation (intraday) stocks.
 Investors has to pay brokerage charges 2$ on per transaction.
 Reconcile the profit/loss of investors by trading the stocks.

My Designed classes are;

// Stock class

public class Stock {

    public String companyName = null;
    public String stockRating = null;
    public int price = 0;
    public int numberOfShares = 0;

    public Stock(String companyName, String stockRating, int stockPrice, int numberShares) {
        // TODO Auto-generated constructor stub
        this.companyName = companyName;
        this.stockRating = stockRating;
        this.price = price;
        this.numberOfShares = numberShares;
    }

    public String getCompanyName() {
        return companyName;
    }
    public void setCompanyName(String companyName) {
        this.companyName = companyName;
    }
    public String getStockRating() {
        return stockRating;
    }
    public void setStockRating(String stockRating) {
        this.stockRating = stockRating;
    }
    public int getPrice() {
        return price;
    }
    public void setPrice(int price) {
        this.price = price;
    }
    public int getNumberOfShares() {
        return numberOfShares;
    }
    public void setNumberOfShares(int numberOfShares) {
        this.numberOfShares = numberOfShares;
    }

}

//Stock Holder class

public class ShareHolder {

private String shareHolderName;
private String uidaiNo;
private String bankDetails;

public String getShareHolderName() {
    return shareHolderName;
}
public void setShareHolderName(String shareHolderName) {
    this.shareHolderName = shareHolderName;
}
public String getUidaiNo() {
    return uidai;
}
public void setUidaiNo(String uidai) {
    this.uidai = uidai;
}
public String getBankDetails() {
    return bankDetails;
}
public void setBankDetails(String bankDetails) {
    this.bankDetails = bankDetails;
    }

}

//StockPortfolio class

public class StockPortfolio {

private static final int PORTFOLIO_SIZE = 10;
private Stock [] stocksPortfolio;

 public Stock [] getstocksPortfolio(){
      return stocksPortfolio;
  }

  public void setstocksPortfolio(Stock [] value){
      stocksPortfolio = value;
      }
}

//Main class

import java.util.Scanner;

public class StockBrokingReconcilation {

    private static StockPortfolio stockPortfolio;
    private static final int PORTFOLIO_SIZE = 10;

    private static void stockReconciling() {
      for (int i = 0; i<PORTFOLIO_SIZE; i++){
        Scanner console = new Scanner(System.in);

        System.out.println ("Stock's name:");
        String companyName = console.next();

        System.out.println ("Stock's rating");
        String stockRating = console.next();

        System.out.println ("Stock's price:");
        int stockPrice = console.nextInt();

        System.out.println ("Numbers of shares: ");
        int numberShares= console.nextInt();

      stockPortfolio.getstocksPortfolio()[0] = 
        new Stock(companyName, stockRating, stockPrice, numberShares);
     }
    }
}

So, can any buddy help me to design this problem in better way as requirements are given above. If there is a sample program related to my title of the problem, please share the link. I am very new to design thinking.