Coder and Decoder - Java Pt. 2

/*
* Purpose: to create a GUI that codes and decodes strings
*/

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class CoderGui implements ActionListener{

private JTextField plntxt; //object representing a text field
private JTextField cphrtxt; //object representing a text field
private JButton encod; //object representing a button
private JButton decod; //object representing a button
private JButton reset; //object representing a button
private JFrame frame; //object representing the frame
private CoderDecoder cd; //object used to perform actions with the GUI

//default constructor to build the frame
public CoderGui(){

cd = new CoderDecoder();
cphrtxt = new JTextField(20);
plntxt = new JTextField(20);
encod = new JButton("Encode");
decod = new JButton("Decode");
reset = new JButton("Reset");
frame = new JFrame("Coder Decoder");
frame.setSize(340, 120);
frame.setLayout(new FlowLayout());
frame.setResizable(false);

cphrtxt.addActionListener(this);
plntxt.addActionListener(this);
encod.addActionListener(this);
decod.addActionListener(this);
reset.addActionListener(this);

frame.add(new JLabel("Plaintext: "));
frame.add(plntxt);
frame.add(new JLabel("Cyphertext: "));
frame.add(cphrtxt);
frame.add(encod);
frame.add(decod);
frame.add(reset);

frame.setVisible(true);

}//end CoderGui

//overwritten method that performs an action when an even occurs
public void actionPerformed(ActionEvent ae){

//else if ladder determining which event has occurred
if(ae.getActionCommand().equals("Encode"))
cphrtxt.setText(cd.getCoded(plntxt.getText()));

else if(ae.getActionCommand().equals("Decode"))
plntxt.setText(cd.getDecoded(cphrtxt.getText()));

else if(ae.getActionCommand().equals("Reset")){

cphrtxt.setText("");
plntxt.setText("");

}//end else if

}//end actionPerformed

//main to test code
public static void main(String[] args){

CoderGui cg = new CoderGui();

}//end main

}//end CoderGui