Thread: Java Swing

I am learning java swing and the following code is not working. What am I doing wrong?

public void actionPerformed(ActionEvent ae)
	{
		if(ae.getActionCommand().equals("Convert"))
		{
			if(Cel)
			{
			int jml = Integer.parseInt(Cel.getText());
			int result = jml * 9/5 + 32;
			Fah.setText(Integer.toString(result));
			}
			else
			{
				int jml = Integer.parseInt(Fah.getText());
				int result = (jml - 32) * 5/9;
				Fah.setText(Integer.toString(result));
			}
		}
		else
		{
			Cel.setText("");
			Fah.setText("");
		}
	}

 
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.*;
import javax.swing.border.Border;
 
public class TempConvertor extends JFrame implements ActionListener
{
	JButton Convert;
	JButton Reset;
	JTextField Cel;
	JTextField Fah;
	JLabel CelLbl;
	JLabel farenheight;
 
	TempConvertor()
	{
		JFrame j = new JFrame("Temp Convertor");
		j.setSize(200,175);
		j.setResizable(false);
		j.setLayout(new FlowLayout());
		j.setDefaultCloseOperation(EXIT_ON_CLOSE);
 
		//create buttons
		Convert = new JButton("Convert");
		Reset = new JButton("Reset");
 
		Convert.addActionListener(this);
		Reset.addActionListener(this);
 
		//create labels
		CelLbl = new JLabel("Celsius");
		farenheight = new JLabel("Farenheight");
 
		CelLbl.setVerticalAlignment(SwingConstants.BOTTOM);
		farenheight.setVerticalAlignment(SwingConstants.BOTTOM);
		Border border = BorderFactory.createEtchedBorder();
		CelLbl.setBorder(border);
		farenheight.setBorder(border);
 
		JPanel cp = ((JPanel) j.getContentPane());
		cp.setBorder(BorderFactory.createEmptyBorder(4,4,4,4));
 
		//create text fields
		Cel = new JTextField(5);
		Fah = new JTextField(5);
 
		Cel.setActionCommand("Cel");
		Fah.setActionCommand("Fah");
 
		//add TextFields
		j.add(CelLbl);
		j.add(Cel);
		j.add(farenheight);//label
 
		j.add(Fah);
 
		//add Buttons
		j.add(Convert);
		j.add(Reset);
 
		j.setVisible(true);	
	}
 
	public void actionPerformed(ActionEvent ae)
	{
		if(ae.getActionCommand().equals("Convert"))
		{
			if(Cel)
			{
			int jml = Integer.parseInt(Cel.getText());
			int result = jml * 9/5 + 32;
			Fah.setText(Integer.toString(result));
			}
			else
			{
				int jml = Integer.parseInt(Fah.getText());
				int result = (jml - 32) * 5/9;
				Fah.setText(Integer.toString(result));
			}
		}
		else
		{
			Cel.setText("");
			Fah.setText("");
		}
	}
 
 
	public static void main(String[] args)
	{
		new TempConvertor();
	}
}