Swing Demo

package java_samples_hwang;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
/**
 *
 * @author hwang
 */
public class SwingDemo {
     JTextField txtfld ;
    public void createGUI()
    {
    JFrame frame = new JFrame("Hello World Swing");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     Container cp = frame.getContentPane();
    JButton button = new JButton("push button");
    txtfld = new JTextField(20);
    cp.setLayout(new FlowLayout());
    ActionListener al = new ActionListener() {
        public void actionPerformed(ActionEvent e)
        {
           txtfld.setText("button clicked");
        }
    };
    button.addActionListener(al);
    cp.add(button);
    cp.add(txtfld);
    frame.pack();
    frame.setVisible(true);
    }
}
class SwingEx
{
    public static void main(String args[])
    {
        SwingDemo obj = new SwingDemo();
        obj.createGUI();
    }
}