import java.awt.*; import java.awt.event.*; import javax.swing.*; public class ButtonDemo JLabel jlab; public ButtonDemo() JFrame jfrm = new JFrame("An Event Example"); jfrm.setLayout(new FlowLayout()); jfrm.setSize(220, 90); jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Create two event source buttons JButton jbtnAlpha = new JButton("Alpha"); JButton jbtnBeta = new JButton("Beta"); // Add an action listener using an anonymous inner class jbtnAlpha.addActionListener(new ActionListener() public void actionPerformed(ActionEvent ae) jlab.setText("Alpha was pressed."); ); // Add an action listener using a modern lambda expression jbtnBeta.addActionListener(ae -> jlab.setText("Beta was pressed.")); jfrm.add(jbtnAlpha); jfrm.add(jbtnBeta); jlab = new JLabel("Press a button."); jfrm.add(jlab); jfrm.setVisible(true); public static void main(String[] args) SwingUtilities.invokeLater(() -> new ButtonDemo()); Use code with caution. Key Event Handling Mechanisms
Organizes a clean sequence of components stacked strictly vertically or lined up horizontally. Stacking custom side menus or configuration settings. Finding Study Material and PDFs Legally swing a beginner39s guide herbert schildt pdf