import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JWindow;
import java.awt.FlowLayout;
import java.awt.Insets;
import java.awt.Dimension;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class Code2 implements ActionListener {

JLabel jLabInstruction, jLaberror, copyright;
    JLabel curStatus = new JLabel("");
    JFrame frame = new JFrame();
    JTextField uI;
    Object fileExists;
    boolean file;
    JTextArea textArea;
    JButton jbtnSubmit;
    Object results;
    String[] diagResults;
    boolean check;
    JScrollPane areaScrollPane;
    String btnResponseText;


// Set up the GUI end for the user
    public void startGUI() {
        // These are all essential GUI pieces
        copyright = new JLabel("");
        uI = new JTextField("");
        uI = new JTextField(25);
        new JTextArea("");

        final JFrame jfrm = new JFrame(
                "program");
        jfrm.setLayout(new FlowLayout());
        jfrm.setSize(300, 300);
        jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        textArea = new JTextArea(5, 20);
        textArea.setEditable(false);
        textArea.setLineWrap(true);
        textArea.setWrapStyleWord(true);
        textArea.setCaretPosition(textArea.getDocument().getLength());
        jLabInstruction = new JLabel("SYSTEM: Please type in a command: ");
        jbtnSubmit = new JButton("Submit");
        jLaberror = new JLabel("");
        textArea.setMargin(new Insets(10, 10, 10, 10));

        areaScrollPane = new JScrollPane(textArea);
        areaScrollPane
                .setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);
        areaScrollPane.setPreferredSize(new Dimension(250, 150));

        jfrm.add(jLaberror);
        jfrm.add(curStatus);
        jfrm.add(areaScrollPane);
        jfrm.add(jLabInstruction);
        jfrm.add(uI);
        jfrm.add(jbtnSubmit);
        jfrm.add(copyright);
        jfrm.setVisible(true);
    }

public void actionPerformed(ActionEvent e) {
        btnResponseText = "hi there!";
        Toolkit.getDefaultToolkit().beep();
        // Get the text
        btnResponseText = getuIText();
    }

    // Writes to the text area
    public void writeToTextArea(char annotation, String userInputText) {
        if (annotation == 's') {
            textArea.append("\nSYSTEM: " + userInputText);
        } else if (annotation == 'n') {
            textArea.append(userInputText.toUpperCase());
        } else {
            {
                textArea.append("\nUSER: " + userInputText.toUpperCase());
            }
        }
    }

    public String btnClick() {
        //where initialization occurs:
        jbtnSubmit.addActionListener(this);
        return btnResponseText;
    }

    }