Question

This program allows a user to calculate to enter sales and calculate sales taxes per state.
The program is giving errors when it gets to reading the double word states (eg New Jersey).I need helo with part.

    import java.text.DecimalFormat;
import java.util.*;
import java.io.*;
import java.lang.reflect.Array;
import java.nio.CharBuffer;
import java.awt.*;
//import java.awt.event.*;
import javax.lang.model.type.ArrayType;
import javax.swing.*;
import javax.swing.event.*;
public class PJ5 extends JFrame implements ListSelectionListener
{String []States = new String[100];
    double []statetax = new double[100];
double sales;
JPanel p1;
JList  StateList;



JTextField salesField;
private JTextField taxField;
public static void main(String []args)    
  {
  PJ5  x = new PJ5();
  x.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  x.setTitle("Sales tax calculator");
  x.setSize(350, 250);
  x.setVisible(true);

  } // main

public PJ5() // constructor
{
String s;
StringTokenizer st;
int k=0;
try 
{
BufferedReader inFile = new BufferedReader(new FileReader("C:\\Users\\Owner\\Documents\\taxrates.txt"));
    while ((s= inFile.readLine()) != null)
    {


st = new StringTokenizer(s);
        States[k]=(st.nextToken());

    statetax[k] = Double.valueOf(st.nextToken());

    ++k;
    } // while not EOF
  inFile.close();
} catch (Exception e) { System.err.println(e); }



JPanel p1 =new JPanel();

 p1.setLayout(new GridLayout(2,1));

p1.add(new JLabel("Sales amount:"));
salesField= new JTextField(5);
salesField.setEditable(true);
p1.add(salesField);


p1.add(new JLabel("tax:"));
taxField= new JTextField(4);
taxField.setEditable(false);
p1.add(taxField);


add(p1,BorderLayout.NORTH);
pack();
setVisible(true);

JPanel p = new JPanel();
StateList = new JList(States);  // create a JList object
StateList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); 
JScrollPane sp = new JScrollPane(StateList);  // adding scrolling capability
p.add(sp);
getContentPane().add(p, BorderLayout.SOUTH);
// Event registration
StateList.addListSelectionListener(this);
} // constructor

// Event handling
public void valueChanged(ListSelectionEvent event)
     {
    DecimalFormat dollar = new DecimalFormat("0.00");   
    double tax;
     sales=Double.parseDouble(salesField.getText());

tax=sales* (statetax[StateList.getSelectedIndex()]/100);
     taxField.setText("$"+dollar.format(tax));

     } // valueChanged
}

here is the text file with the states en their tax rates.

Alabama 4.0
Alaska 0.
Arizona 5.6
Arkansas 6.0
California 8.25
Colorado 2.9
Connecticut 6.0
Delaware  2.07
Florida 6.0
Georgia 4.0
Hawaii 4.0
Idaho 6.0
Illinois 6.25
Indiana 7.0
Iowa    6.0
Kansas  5.3
Kentucky    6.0
Louisian,   4.0
Maine   5.0
Maryland    6.0
Massachusetts   6.25
Michigan    6.0
Minnesota   6.875
Mississippi 7.0
Missouri    4.225
Montana 0.
Nebraska    5.5
Nevada  6.85
New Hampshire 0.0
New Jersey  7.0
New Mexico  5.375
New York    4.0
North Carolina  4.5
North Dakota    5.0
Ohio    5.5
Oklahoma    4.5
Oregon  0.
Pennsylvania    6.0
Rhode Island    7.0
South Carolina  6.0
South Dakota    4.0
Tennessee   7.0
Texas   6.25
Utah    5.95
Vermont     6.0
Virginia    5.0
West Virginia   6.0
Wisconsin   5.0
Washington  6.5
Washington DC   5.75
Wyoming 4.0

Answer 1

Its because, the tokenizer parses New as a string then the next code parses Hampshire as a double, you may need to restructure your code