TemperaturesFrame.java

import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JLabel;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
public class TemperaturesFrame extends JFrame
{
    private JLabel header;
    private JLabel Formulas;
    private JLabel FtoC;
    private JLabel CtoF;
    private JButton FCButton;
    private JButton CFButton;
    public TemperaturesFrame()
    {
        super( "Temperature Conversion" );
        setLayout( new FlowLayout() );

        header = new JLabel( "What are you converting?" );
        header.setToolTipText( "header" );
        add( header );

        FCButton = new JButton( "Fahrenheit to Celsius" );
        add( FCButton );

        CFButton = new JButton( "Celsius to Fahrenheit" );
        add( CFButton );

        Formulas = new JLabel( "    -  Formulas  -    " );
        Formulas.setToolTipText( "Formulas" );
        add( Formulas );

        FtoC = new JLabel( "Fahrenheit = Celsius * 5/9 + 32" );
        FtoC.setToolTipText( "FtoC" );
        add( FtoC );

        CtoF = new JLabel( "Celsius = (Fahrenheit - 32) * 5/9" );
        CtoF.setToolTipText( "CtoF" );
        add( CtoF );

        FCHandler handler1 = new FCHandler();
        FCButton.addActionListener( handler1 );

        CFHandler handler2 = new CFHandler();
        CFButton.addActionListener( handler2 );
    }
    private class FCHandler implements ActionListener
    {
        public void actionPerformed( ActionEvent event )
        {
        String fahrenheit =
            JOptionPane.showInputDialog( "Enter Fahrenheit" );
            int tempF = Integer.parseInt( fahrenheit );
            int Celsius = (tempF - 32) * 5/9;

        JOptionPane.showMessageDialog( null, "The celsius temperature is " +Celsius,
        "celsius", JOptionPane.PLAIN_MESSAGE );
        }
    }
    private class CFHandler implements ActionListener
    {
        public void actionPerformed( ActionEvent event )
        {
        String celsius =
            JOptionPane.showInputDialog( "Enter Celsius" );
            int tempC = Integer.parseInt( celsius );
            int Fahrenheit = tempC * 9 / 5 + 32;;

        JOptionPane.showMessageDialog( null, "The fahrenheit temperature is " +Fahrenheit,
        "Fahrenheit", JOptionPane.PLAIN_MESSAGE );
        }
    }
}