import java.awt.*;
import java.awt.event.*;
import java.io.*;

import javax.swing.*;

public class JTextFieldTest extends JFrame implements ActionListener{
	
	private JTextField textField1;
	private JTextField textField2;
	private JTextField textField3;
	private JTextField textField4;
	
	private String fileName = "UserData.txt";
		
	public JTextFieldTest(){
		super("JTextFieldTest");
		init();
	}
	
	public static void main(String[] args){
		JTextFieldTest test = new JTextFieldTest();
	}
	
	public void init(){
		
		textField1 = new JTextField();
		textField2 = new JTextField();
		textField3 = new JTextField();
		textField4 = new JTextField();
		JPanel textFieldPanel = new JPanel();
		textFieldPanel.setLayout(new GridLayout(4,2));
		textFieldPanel.add(new JLabel("Name: ",SwingConstants.RIGHT));
		textFieldPanel.add(textField1);
		textFieldPanel.add(new JLabel("Address: ",SwingConstants.RIGHT));
		textFieldPanel.add(textField2);
		textFieldPanel.add(new JLabel("City: ",SwingConstants.RIGHT));
		textFieldPanel.add(textField3);
		textFieldPanel.add(new JLabel("State: ",SwingConstants.RIGHT));
		textFieldPanel.add(textField4);
		
		getContentPane().add(textFieldPanel,BorderLayout.NORTH);

		JPanel buttonPanel = new JPanel();
		buttonPanel.setLayout(new FlowLayout());
		
		JButton saveButton = new JButton("Save");
		saveButton.addActionListener(this);
		buttonPanel.add(saveButton);

		JButton loadButton = new JButton("Load");
		loadButton.addActionListener(this);
		buttonPanel.add(loadButton);

		JButton clearButton = new JButton("Clear");
		clearButton.addActionListener(this);
		buttonPanel.add(clearButton);

		JButton exitButton = new JButton("Exit");
		exitButton.addActionListener(this);
		buttonPanel.add(exitButton);

		getContentPane().add(buttonPanel,BorderLayout.CENTER);
		pack();
		setLocationRelativeTo(null);
		show();		
		
	}
	
	public void actionPerformed(ActionEvent ae){
		String actionCommand = ae.getActionCommand();
		if (actionCommand.compareTo("Save") == 0) {
			save();
		}else if (actionCommand.compareTo("Load") == 0) {
			load();
		}else if (actionCommand.compareTo("Clear") == 0) {
			clear();
		}else if (actionCommand.compareTo("Exit") == 0) {
			exit();
		}
	}
		
	public void save(){
		try{
			FileWriter fw = new FileWriter(fileName);
			fw.write(textField1.getText() + "\n");
			fw.write(textField2.getText() + "\n");
			fw.write(textField3.getText() + "\n");
			fw.write(textField4.getText() + "\n");
			fw.close();
		}catch(FileNotFoundException fnfe){
			System.err.println("FileNotFoundException: " + fnfe.getMessage());
		}catch(IOException ioe){
			System.err.println("IOException: " + ioe.getMessage());			
		}		
	}
	
	public void load(){
		try{
			FileReader fr = new FileReader(fileName);
			BufferedReader br = new BufferedReader(fr);
			textField1.setText(br.readLine());
			textField2.setText(br.readLine());
			textField3.setText(br.readLine());
			textField4.setText(br.readLine());
			fr.close();			
		}catch(FileNotFoundException fnfe){
			System.err.println("FileNotFoundException: " + fnfe.getMessage());
		}catch(IOException ioe){
			System.err.println("IOException: " + ioe.getMessage());			
		}		
	}
	
	public void clear(){
			textField1.setText("");
			textField2.setText("");
			textField3.setText("");
			textField4.setText("");
	}
	
	public void exit(){
		System.exit(0);
	}
}