Java HW majority done

fill in commented methods*** 

import javax.swing.*;

import javax.swing.table.*;

import java.awt.*;

import java.awt.event.*;

import java.io.*;

import java.util.*;

import com.jaunt.*;

public class MainFrame extends JFrame

{

private final int MAX_NUM_STOCKS = 50;

private String[] symbols;

private double[] shares;

private double[] costs;

private String[] names;

private double[] prices;

private double[] mktvalues;

private double[] dollarChanges;

private double[] percentChanges;

private int numStocks;

private JButton buttonImport;

private JButton buttonUpdate;

private JLabel labelCost;

private JLabel labelValue;

private JLabel labelChangeDollar;

private JLabel labelChangePercent;

private JTable table;

private DefaultTableModel tmodel;

public MainFrame()

{

symbols = new String[MAX_NUM_STOCKS];

shares = new double[MAX_NUM_STOCKS];

costs = new double[MAX_NUM_STOCKS];

names = new String[MAX_NUM_STOCKS];

prices = new double[MAX_NUM_STOCKS];

mktvalues = new double[MAX_NUM_STOCKS];

dollarChanges = new double[MAX_NUM_STOCKS];

percentChanges = new double[MAX_NUM_STOCKS];

numStocks = 0;

createGUI();

buttonImport.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent event)

{

try

{

readData(selectFile());

updateTable();

}

//*******************

// Add an exception handler here for NullPointerException (i.e., no file was selected)

// Do NOT update the table content in this case.

//*******************

catch(NoSuchElementException e)

{

JOptionPane.showMessageDialog(null,"Incorrect File Format!");

updateTable();

}

catch(IndexOutOfBoundsException e)

{

JOptionPane.showMessageDialog(null,"Exceeding the Maximum Number of Stocks (" + MAX_NUM_STOCKS + ")!");

updateTable();

}

catch(Exception e)

{

JOptionPane.showMessageDialog(null,"Importing Portfolio Error!");

updateTable();

}

}

});

buttonUpdate.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent event)

{

if (numStocks == 0)

{

JOptionPane.showMessageDialog(null,"Please Import a Portfolio First!");

return;

}

try

{

getQuotes();

updateValues();

}

catch(Exception e)

{

JOptionPane.showMessageDialog(null,"Failed to Get Quotes!\n"+e.toString());

}

}

});

}

//*******************

// Note: You need to add the third button "About", and implement its event handler

// Once clicked, the button pops up a message dialog box showing the author information

// You need to add multiple lines of code at different places throughout the file (Note: don't add any code here) 

//*******************

public void createGUI()

{

String[] columnNames = {"Symbol", "Name", "Quantity", "Unit Cost", "Price", "Mkt Value", "$ G/L", "% G/L"};

tmodel = new DefaultTableModel(null, columnNames)

 {

  public boolean isCellEditable(int row, int column)

  {

   return false;

  }

 };

table = new JTable(tmodel);

table.setFillsViewportHeight(true);

JScrollPane scrollPane = new JScrollPane(table);

add(scrollPane, BorderLayout.CENTER);

DefaultTableCellRenderer rightRenderer = new DefaultTableCellRenderer();

rightRenderer.setHorizontalAlignment(SwingConstants.RIGHT);

for (int i=2; i<columnNames.length; i++)

{

table.getColumnModel().getColumn(i).setCellRenderer(rightRenderer);

}

table.getColumnModel().getColumn(0).setPreferredWidth(60);

table.getColumnModel().getColumn(1).setPreferredWidth(180);

JLabel label1 = new JLabel("Total Cost: ");

JLabel label2 = new JLabel("Total Market Value: ");

JLabel label3 = new JLabel("Total Gain/Loss ($): ");

JLabel label4 = new JLabel("Total Gain/Loss (%): ");

labelCost = new JLabel("");

labelValue = new JLabel("");

labelChangePercent = new JLabel("");

labelChangeDollar = new JLabel("");

JPanel panelLabels = new JPanel(new GridLayout(2,4));

panelLabels.add(label1);

panelLabels.add(labelCost);

panelLabels.add(label3);

panelLabels.add(labelChangeDollar);

panelLabels.add(label2);

panelLabels.add(labelValue);

panelLabels.add(label4);

panelLabels.add(labelChangePercent);

JPanel panelTemp1 = new JPanel();

panelTemp1.setPreferredSize(new Dimension(100, 40));

JPanel panelTemp2 = new JPanel();

JPanel panelLabelsSurround = new JPanel(new BorderLayout());

panelLabelsSurround.add(panelTemp1, BorderLayout.WEST);

panelLabelsSurround.add(panelLabels, BorderLayout.CENTER);

panelLabelsSurround.add(panelTemp2, BorderLayout.EAST);

buttonImport = new JButton("Import Portfolio");

buttonImport.setPreferredSize(new Dimension(140, 25));

buttonUpdate = new JButton("Update");

buttonUpdate.setPreferredSize(new Dimension(140, 25));

JPanel panelButtons = new JPanel();

panelButtons.add(buttonImport);

panelButtons.add(buttonUpdate);

JPanel panelBottom = new JPanel(new GridLayout(2,1,5,20));

panelBottom.add(panelLabelsSurround);

panelBottom.add(panelButtons);

add(panelBottom, BorderLayout.SOUTH);

setSize(800, 300);

setTitle("Course Project");

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setVisible(true);

}

public File selectFile()

{

JFileChooser fileChooser = new JFileChooser(".");

int result = fileChooser.showOpenDialog(null);

if (result == JFileChooser.CANCEL_OPTION)

{

throw new NullPointerException();

}

return fileChooser.getSelectedFile();

}

public void readData(File infile) // may throw exceptions

{

//**********************

// Implement the body of this method

// This method reads the data from the selected file, and save them into the corresponding arrays: symbols, shares, costs

//**********************

}

public void updateTable()

{

tmodel.setRowCount(numStocks);

for (int i=0; i < numStocks; i++)

{

table.setValueAt(symbols[i], i, 0);

table.setValueAt("", i, 1);

table.setValueAt(String.format("%,.2f", shares[i]), i, 2);

table.setValueAt(String.format("%,.2f", costs[i]), i, 3);

table.setValueAt("", i, 4);

table.setValueAt("", i, 5);

table.setValueAt("", i, 6);

table.setValueAt("", i, 7);

}

labelCost.setText("");

labelValue.setText("");

labelChangeDollar.setText("");

labelChangePercent.setText("");

}

public void getQuotes() throws JauntException

{

//**********************

// Implement the body of this method

// This method retrieves the name and the latest price for each stock symbol from online, and save them into the "names" and "prices" arrays

//**********************

}

public void updateValues()

{

//**********************

// Implement the body of this method

// This method calculates all the measures for each stock (save them into the corresponding arrays: mktvalues, dollarChanges, percentChanges)

// It updates the corresponding cells in "table"

// It also calculates the measures for the entire portfolio, and updates the 4 labels: labelValue, labelCost, labelChangeDollar, labelChangePercent

// Pay attention to the proper formatting of the numbers.

//**********************

}

}