import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class ActionEventDemo extends JFrame implements ActionListener
{
	JButton btnFirst,btnSecond;
	JPanel pnlMain;
	JLabel lblInfo;
	public ActionEventDemo()
	{
		pnlMain=new JPanel();
		btnFirst=new JButton("隱藏按鈕1");
		btnFirst.addActionListener(this);
		btnSecond=new JButton("禁用按鈕2");
		btnSecond.addActionListener(this);
		lblInfo=new JLabel("");
		setContentPane(pnlMain);
		pnlMain.add(btnFirst);
		pnlMain.add(btnSecond);
		pnlMain.add(lblInfo);
		setSize(250,150);
		setTitle("動作事件演示");
		setVisible(true);
	} 
	public void actionPerformed(ActionEvent ae)
	{
		if(ae.getSource()==btnFirst)
		{
			btnFirst.setVisible(false);
			btnSecond.setEnabled(true);
			lblInfo.setText(ae.getActionCommand());
		}
		if(ae.getSource()==btnSecond)
		{
			btnFirst.setVisible(true);
			btnSecond.setEnabled(false);
			lblInfo.setText("按鈕2不可用");
		}
	}
	public static void main(String args[])
	{
		new ActionEventDemo();
	}
}