2 Frames in one file

Question

i'm trying to put this mass and temperature converter together just like two frames running simultaneously on the screen. i dont know exactly how to do it. what do you think is wrong with this? thanks :)
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public static void convertertogether extends JFrame implements Runnable()
//Mass Converter
public class MassConverter extends JFrame
  private JLabel ounceLabel;
  private JLabel gramLabel;
  private JLabel poundLabel;
  private JLabel kilogramLabel;
  private JTextField ounceTF;
  private JTextField gramTF;
  private JTextField poundTF;
  private JTextField kilogramTF;
  private JButton clearB, exitB;
  private OunceHandler ounceHandler;
  private GramHandler gramHandler;
  private PoundHandler poundHandler;
  private KgHandler kilogramHandler;
  private ClearButtonHandler cbHandler;
  private ExitButtonHandler ebHandler;
  private static final int WIDTH = 200;
  private static final int HEIGHT = 200;
  private static final double OTOG = 28.34952;
  private static final double GTOP = 453.59;
  private static final double PTOK = 2.20462;
  private static final double GTOKG = 1000;
  public MassConverter()
   //Set the Title of the Window
   setTitle("Mass Converter");
   //Get the container
   Container pane2 = getContentPane();
   //Set the layout
   pane2.setLayout(new GridLayout(5, 2));
   //Create the four Labels
   ounceLabel = new JLabel ("Ounce: ", SwingConstants.RIGHT);
   gramLabel = new JLabel ("Gram: ", SwingConstants.RIGHT);
   poundLabel = new JLabel ("Pound: ", SwingConstants.RIGHT);
   kilogramLabel = new JLabel ("Kilogram: ", SwingConstants.RIGHT);
   //Create Ounce Text Field
   ounceTF = new JTextField(7);
   ounceHandler = new OunceHandler();
   ounceTF.addActionListener(ounceHandler);
   //Create Gram Text Field
   gramTF = new JTextField(7);
   gramHandler = new GramHandler();
   gramTF.addActionListener(gramHandler);
   //Create Pound Text Field
   poundTF = new JTextField(7);
   poundHandler = new PoundHandler();
   poundTF.addActionListener(poundHandler);
   //Create Kilogram Text Field
   kilogramTF = new JTextField(7);
   kilogramHandler = new KgHandler();
   kilogramTF.addActionListener(kilogramHandler);
   //Create Clear Button
   clearB = new JButton("Clear");
   cbHandler = new ClearButtonHandler();
   clearB.addActionListener(cbHandler);
   //Create Exit Button
   exitB = new JButton("Exit");
   ebHandler = new ExitButtonHandler();
   exitB.addActionListener(ebHandler);
   //Place the components in the container
   pane2.add(ounceLabel);
   pane2.add(ounceTF);
   pane2.add(gramLabel);
   pane2.add(gramTF);
   pane2.add(poundLabel);
   pane2.add(poundTF);
   pane2.add(kilogramLabel);
   pane2.add(kilogramTF);
   pane2.add(clearB);
   pane2.add(exitB);
   //Set the size of the window and display it
   setSize(WIDTH, HEIGHT);
   setDefaultCloseOperation(EXIT_ON_CLOSE);
   setVisible(true);
  private class OunceHandler implements ActionListener
   public void actionPerformed(ActionEvent e)
    double ounce, gram, pound, kilogram;
    ounce = Double.parseDouble(ounceTF.getText());
    gram = ounce * OTOG;
    gramTF.setText(String.format("%.5f", gram));
    pound = gram / GTOP;
    poundTF.setText(String.format("%.5f", pound));
    kilogram = pound / PTOK;
    kilogramTF.setText(String.format("%.5f", kilogram));
  private class GramHandler implements ActionListener
   public void actionPerformed(ActionEvent e)
    double ounce, gram, pound, kilogram;
    gram = Double.parseDouble(gramTF.getText());
    ounce = gram / OTOG;
    ounceTF.setText(String.format("%.5f", ounce));
    pound = gram / GTOP;
    poundTF.setText(String.format("%.5f", pound));
    kilogram = pound / PTOK;
    kilogramTF.setText(String.format("%.5f", kilogram));
  private class PoundHandler implements ActionListener
   public void actionPerformed(ActionEvent e)
    double ounce, gram, pound, kilogram;
    pound = Double.parseDouble(poundTF.getText());
    kilogram = pound / PTOK;
    kilogramTF.setText(String.format("%.5f", kilogram));
    gram = kilogram * GTOKG;
    gramTF.setText(String.format("%.5f", gram));
    ounce = gram / OTOG;
    ounceTF.setText(String.format("%.5f", ounce));
  private class KgHandler implements ActionListener
   public void actionPerformed(ActionEvent e)
    double ounce, gram, pound, kilogram;
    kilogram = Double.parseDouble(kilogramTF.getText());
    gram = kilogram * GTOKG;
    gramTF.setText(String.format("%.5f", gram));
    ounce = gram / OTOG;
    ounceTF.setText(String.format("%.5f", ounce));
    pound = gram / GTOP;
    poundTF.setText(String.format("%.5f", pound));
  private class ClearButtonHandler implements ActionListener
   public void actionPerformed(ActionEvent e)
    ounceTF.setText(null);
    gramTF.setText(null);
    poundTF.setText(null);
    kilogramTF.setText(null);
  private class ExitButtonHandler implements ActionListener
   public void actionPerformed(ActionEvent e)
    System.exit(0);
//Temperature Converter
public class TempConverter extends JFrame
  private JLabel celsiusLabel;
  private JLabel fahrenheitLabel;
  private JLabel kelvinLabel;
  private JTextField celsiusTF;
  private JTextField fahrenheitTF;
  private JTextField kelvinTF;
   private JButton clearB, exitB;
  private CelsHandler celsiusHandler;
  private FahrHandler fahrenheitHandler;
  private KelvHandler kelvinHandler;
   private ClearButtonHandler cbHandler;
  private ExitButtonHandler ebHandler;
  private static final int WIDTH = 250;
  private static final int HEIGHT = 200;
  private static final double FTOC = 5.0/9.0;
  private static final double CTOF = 9.0/5.0;
  private static final int OFFSET = 32;
  private static final double K = 273.15;
  public TempConverter()
   //Set the Title of the Window
   setTitle("Temperature Converter");
   //Get the container
   Container c = getContentPane();
   //Set the layout
   c.setLayout(new GridLayout(4, 2));
   //Create the three Labels
   celsiusLabel = new JLabel ("Celsius: ", SwingConstants.RIGHT);
   fahrenheitLabel = new JLabel ("Fahrenheit: ", SwingConstants.RIGHT);
   kelvinLabel = new JLabel ("Kelvin: ", SwingConstants.RIGHT);
   //Create Celsius Text Field
   celsiusTF = new JTextField(7);
   celsiusHandler = new CelsHandler();
   celsiusTF.addActionListener(celsiusHandler);
   //Create Fahrenheit Text Field
   fahrenheitTF = new JTextField(7);
   fahrenheitHandler = new FahrHandler();
   fahrenheitTF.addActionListener(fahrenheitHandler);
   //Create Kelvin Text Field
   kelvinTF = new JTextField(7);
   kelvinHandler = new KelvHandler();
   kelvinTF.addActionListener(kelvinHandler);
   //Create Clear Button
   clearB = new JButton("Clear");
   cbHandler = new ClearButtonHandler();
   clearB.addActionListener(cbHandler);
   //Create Exit Button
   exitB = new JButton("Exit");
   ebHandler = new ExitButtonHandler();
   exitB.addActionListener(ebHandler);
   //Place the components in the container
   c.add(celsiusLabel);
   c.add(celsiusTF);
   c.add(fahrenheitLabel);
   c.add(fahrenheitTF);
   c.add(kelvinLabel);
   c.add(kelvinTF);
   c.add(clearB);
   c.add(exitB);
   //Set the size of the window and display it
   setSize(WIDTH, HEIGHT);
   setDefaultCloseOperation(EXIT_ON_CLOSE);
   setVisible(true);
  private class CelsHandler implements ActionListener
   public void actionPerformed(ActionEvent e)
    double celsius, fahrenheit, kelvin;
    celsius = Double.parseDouble(celsiusTF.getText());
    fahrenheit = celsius * CTOF + OFFSET;
    fahrenheitTF.setText(String.format("%.5f", fahrenheit));
    kelvin = celsius + K;
    kelvinTF.setText(String.format("%.5f", kelvin));
  private class FahrHandler implements ActionListener
   public void actionPerformed(ActionEvent e)
    double celsius, fahrenheit, kelvin;
    fahrenheit = Double.parseDouble(fahrenheitTF.getText());
    celsius = (fahrenheit - OFFSET) * FTOC;
    celsiusTF.setText(String.format("%.5f", celsius));
    kelvin = celsius + K;
    kelvinTF.setText(String.format("%.5f", kelvin));
  private class KelvHandler implements ActionListener
   public void actionPerformed(ActionEvent e)
    double celsius, fahrenheit, kelvin;
    kelvin = Double.parseDouble(kelvinTF.getText());
    celsius = kelvin - K;
    celsiusTF.setText(String.format("%.5f", celsius));
    fahrenheit = celsius * CTOF + OFFSET;
    fahrenheitTF.setText(String.format("%.5f", fahrenheit));
  private class ClearButtonHandler implements ActionListener
   public void actionPerformed(ActionEvent e)
    celsiusTF.setText(null);
    fahrenheitTF.setText(null);
    kelvinTF.setText(null);
  private class ExitButtonHandler implements ActionListener
   public void actionPerformed(ActionEvent e)
    System.exit(0);
public static void main(String[] args)
  MassConverter massConv = new MassConverter();
  TempConverter tempConv = new TempConverter();
}

Answer 1

han_jaeryul wrote:
i'm trying to put this mass and temperature converter together just like two frames running simultaneously on the screen. i dont know exactly how to do it. what do you think is wrong with this? thanks :)
public static void convertertogether extends JFrame implements Runnable()
Also, you need to reread the basics if you think that this is how you start a class. You need to define a class as a class. It doesn't have a return type, and it's not static (unless it's an inner class). There are too many errors of basic java to know where to begin correcting. Thus I recommend scuttling the whole thing. By the way, are these your TempConverter and MassConverter classes or did you get them from online?