核心Swing组件（六）(一)

package swingstudy.ch04;
 
import java.awt.EventQueue;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
 
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JRootPane;
 
public class ActionButtonSample {
 
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
 
		Runnable runner = new Runnable() {
			public void run() {
			JFrame frame = new JFrame("DefaultButton");
			frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
			frame.setLayout(new GridLayout(2,2,10,10));
 
			ActionListener actionListener = new ActionListener() {
			public void actionPerformed(ActionEvent event) {
				String command = event.getActionCommand();
				System.out.println("Selected: "+command);
					}
				};
 
				JButton button1 = new JButton("Text Button");
				button1.setMnemonic(KeyEvent.VK_B);
				button1.setActionCommand("First");
				button1.addActionListener(actionListener);
				frame.add(button1);
 
				JButton button2 = new JButton("WarnIcon");
				button2.setActionCommand("Second");
				button2.addActionListener(actionListener);
				frame.add(button2);
 
				JButton button3 = new JButton("Warn");
				button3.setActionCommand("Third");
				button3.addActionListener(actionListener);
				frame.add(button3);
 
				String htmlButton = "HTMLButton
"+
				    "Multi-line";
				JButton button4 = new JButton(htmlButton);
				button4.setActionCommand("Fourth");
				button4.addActionListener(actionListener);
				frame.add(button4);
 
				JRootPane rootPane = frame.getRootPane();
				rootPane.setDefaultButton(button2);
 
				frame.setSize(300, 200);
				frame.setVisible(true);
			}
		};
		EventQueue.invokeLater(runner);
	}
 
}