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

public class SimpleUI extends JFrame implements ActionListener {
    
    JTextField field;
    JLabel answerlbl;
    
    public SimpleUI () {
        this.setSize(400, 400);
        this.setTitle("Simple UI");
        setupButtonsPanel();
        setupResponsePanel();
        setupQuestionPanel();
        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setVisible(true);
    }
    
    void setupButtonsPanel() {
        JButton b1 = new JButton("Clear");
        JButton b2 = new JButton("Submit");
        b1.addActionListener(this);
        b2.addActionListener(this);
        
        JPanel p = new JPanel();
        p.setLayout(new FlowLayout());
        p.add(b1);
        p.add(b2);
        
        getContentPane().add(p, BorderLayout.SOUTH);
    }
    
    void setupResponsePanel() {
        JLabel lbl = new JLabel("Answer:   ");
        field = new JTextField(12);
        
        JPanel p = new JPanel();
        p.setLayout(new FlowLayout());
        p.add(lbl);
        p.add(field);
        
        this.getContentPane().add(p, BorderLayout.CENTER);
        
    }
    
    void setupQuestionPanel() {
        JPanel p = new JPanel();
        p.setLayout(new GridLayout(2, 1, 20, 20));
        JLabel qlbl = new JLabel("What day of the week is it today?");
        answerlbl = new JLabel("Your answer is: ");
        p.add(qlbl);
        p.add(answerlbl);
        
        getContentPane().add(p, BorderLayout.NORTH);
    }   
    
    public void actionPerformed(ActionEvent e) {
        if (e.getActionCommand().equals("Submit")) {
            String answerText = field.getText();
            if (answerText.equalsIgnoreCase("Friday"))
              answerlbl.setText("Your answer is correct");
             else 
                 answerlbl.setText("Your answer is wrong");
        } else if (e.getActionCommand().equals("Clear")) {
            field.setText("");
        }
        
    }
    
    public static void main(String[] args) {
        new SimpleUI();
    }
}