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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();

}

});

}