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

class ButtonDemo {
    
    JLabel jlab;
    
    ButtonDemo() {
        
        JFrame jfrm = new JFrame("A Button Example");
        
        jfrm.setLayout(new FlowLayout());
        
        jfrm.setSize(220, 90);
        
        jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        JButton jbtnUp = new JButton("Up");
        JButton jbtnDown = new JButton("Down");
        
        jbtnUp.addActionListener((ae) -> jlab.setText("You pressed Up."));
        jbtnDown.addActionListener((ae) -> jlab.setText("You pressed Down."));
        
        jfrm.add(jbtnUp);
        jfrm.add(jbtnDown);
        
        jlab = new JLabel("Press a button");
        jfrm.add(jlab);
        
        
        jfrm.setVisible(true);
        
    }
    
   
    public static void main(String args[]) {
        try { 
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
        } catch(Exception e) {};
        
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new ButtonDemo();
            }
        });
    }
}