Any ideas of how an input or output file could be included in this program in a useful way? Also how would it be executed?

package SizeConverterArray;

import java.awt.*;

import java.awt.event.*;

import java.applet.*;

import javax.swing.*;

public class SizeConverterArray extends Frame implements ItemListener, ActionListener

{

 private String[] Item = {“Nike”, “Adidas”, “Balenciaga(EU)”, “Puma”, “Timberland(Boots)”}; // array

 JComboBox convertFrom, convertTo;

 JTextField txtFrom, txtTo;

 JButton compute, exit;

 JLabel from, to;

 JLabel lblFrom, lblTo;

 JPanel mainPanel = new JPanel();

 double input = 0;

 double result = 0;

 public SizeConverterArray() {

  super(“Shoe Size Converter”);

  setSize(420,300);

  setLayout(null);

  setBackground(Color.lightGray);

  lblFrom = new JLabel(“From:”);

  lblFrom.setBounds(30,45,250,30);

  lblFrom.setForeground(Color.RED);

  add(lblFrom);

  convertFrom = new JComboBox();

  convertFrom.setBounds(30,70,150,30);

  for (String x:Item)    // convertFrom field

  {

    convertFrom.addItem(x);

  }

  add(convertFrom);

  lblTo = new JLabel(“To:”);

  lblTo.setBounds(230,45,250,30);

  lblTo.setForeground(Color.RED);

  add(lblTo);

  convertTo = new JComboBox();

  convertTo.setBounds(230,70,150,30);

  for (String x:Item)  // convertTo field

  {

    convertTo.addItem(x);

  }  

  add(convertTo);

  from = new JLabel(“Enter Size to Convert:”);

  from.setBounds(50,110,300,30);

  add(from);

  txtFrom = new JTextField(15);

  txtFrom.setBounds(50,140,300,30);

  add(txtFrom);

  compute = new JButton(“Convert”);

  compute.setBounds(100,250,100,30);

  add(compute);

  to = new JLabel(“Size Converted:”);

  to.setBounds(50,170,300,30);

  add(to); 

  txtTo = new JTextField(15);

  txtTo.setBounds(50,200,300,30);

  txtTo.setEditable(false);

  txtTo.setForeground(Color.RED);

  add(txtTo);

  exit = new JButton(“Exit”);

  exit.setBounds(210,250,100,30);

  add(exit);

  convertFrom.addItemListener(this);

  convertTo.addItemListener(this);

  compute.addActionListener(this);

  txtFrom.addActionListener(this);

  exit.addActionListener(this);

    addWindowListener(new WindowAdapter() {

    public void windowClosing(WindowEvent e) {

     exit();

    }

   });

 }

 public void exit(){

  setVisible(false);

  dispose();

  System.exit(0);

 }

 public static void main(String args[]) {

  SizeConverterArray w = new SizeConverterArray();

  w.setVisible(true);

 }

// GetSize() function

public double GetSize(String x) {

  switch(x)

  {

   case “Nike”: {

      if(convertTo.getSelectedItem()==”Nike”)

      {

       result = (input);

        txtTo.setText(“”+result);

      }

      else if(convertTo.getSelectedItem()==”Adidas”)

      {

       result = (input – 0.5);

       txtTo.setText(“”+result);

      }

      else if(convertTo.getSelectedItem()==”Balenciaga(EU)”)

      {

       result = (input + 32);

       txtTo.setText(“”+result);

      }

      else if(convertTo.getSelectedItem()==”Puma”)

      {

       result = (input * 1.0);

       txtTo.setText(“”+result);

      }

      else if(convertTo.getSelectedItem()==”Timberland(Boots)”)

      {

       result = (input – 1.0);

       txtTo.setText(“”+result);

      }

    }

    break;

   case “Adidas”:{

         if(convertTo.getSelectedItem()==”Nike”)

         {

          result = (input + 0.5);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Adidas”)

         {

          result = (input);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Balenciaga(EU)”)

         {

          result = (input + 31);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Puma”)

         {

          result = (input + 0.5);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Timberland(Boots)”)

         {

          result = (input – 0.5);

          txtTo.setText(“”+result);

         }

   }

   break;

   case “Balenciaga(EU)”:{

           if(convertTo.getSelectedItem()==”Nike”)

           {

            result = (input – 32);

            txtTo.setText(“”+result);

           }

           else if(convertTo.getSelectedItem()==”Adidas”)

           {

            result = (input – 32);

            txtTo.setText(“”+result);

           }

           else if(convertTo.getSelectedItem()==”Balenciaga(EU)”)

           {

            result = (input);

            txtTo.setText(“”+result);

           }

           else if(convertTo.getSelectedItem()==”Puma”)

           {

            result = (input – 32);

            txtTo.setText(“”+result);

           }

           else if(convertTo.getSelectedItem()==”Timberland(Boots)”)

           {

            result = (input – 33);

            txtTo.setText(“”+result);

           }

   }

   break;

   case “Puma”:{

         if(convertTo.getSelectedItem()==”Nike”)

         {

          result = (input * 1.0);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Adidas”)

         {

          result = (input – 0.5);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Balenciaga(EU)”)

         {

          result = (input + 32);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Puma”)

         {

          result = (input);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Timberland(Boots)”)

         {

          result = (input – 1.0);

          txtTo.setText(“”+result);

         }

   }

   break;

   case “Timberland(Boots)”:{

         if(convertTo.getSelectedItem()==”Nike”)

         {

          result = (input + 1.0);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Adidas”)

         {

          result = (input + 0.5);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Balenciaga(EU)”)

         {

          result = (input + 33);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Puma”)

         {

          result = (input + 1.0);

          txtTo.setText(“”+result);

         }

         else if(convertTo.getSelectedItem()==”Timberland(Boots)”)

         {

          result = (input);

          txtTo.setText(“”+result);

         }

       }   

  }

   return result;

}

 public void actionPerformed(ActionEvent e) {

  input = Double.parseDouble(txtFrom.getText());

  String msg = txtFrom.getText();

  if(e.getSource()==compute)

  {

    for (String x:Item) 

    {

     if(convertFrom.getSelectedItem()==x)

       GetSize(x);     

      txtTo.setText(“”+result);

    }

  }

  else

  {

   int choice = JOptionPane.showConfirmDialog(null,”Are You Sure?”,”Exit”,JOptionPane.YES_NO_OPTION);

   if(choice==0) {

    dispose();

    System.exit(0);

   }

  }

 }

 public void itemStateChanged(ItemEvent e)

 {

 }

}