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

public class Ex2 extends JFrame {
    private JTextField data, output;
    private JButton go;
  
    public Ex2() {
        super("Looking for UPPER CASE");
        setSize(400, 400);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);
        data = new JTextField("Enter your text here");
        output = new JTextField(30);
        go = new JButton("check it");
        go.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    output.setText("Has Capitals: " + 
                                   checkForCapitals(data.getText()));
                }
            });
        Container myPane = getContentPane();
        myPane.setLayout(new FlowLayout());
        myPane.add(go);
        myPane.add(data);
        myPane.add(output);
        validate();
    }

    public static void main(String[] args) {
        new Ex2();
    }
}