/*****************************************
展示JLabel
*************************************************/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ui21 extends JFrame implements ActionListener
{
    Container c;
    JButton bot1=new JButton("文字");
    JButton bot2=new JButton("圖形");
    JButton bot0=new JButton("結束");
    ImageIcon icon1;
    JLabel lab;
    String[] show=new String[3];
    int cpcnt=0,gpcnt=0;;
    public ui21()
    {
        super("JLabel展示");
        int i;
        c=getContentPane();
        icon1 = new ImageIcon("bridge/0"+gpcnt+".GIF");
        c.setLayout(new FlowLayout(FlowLayout.CENTER));
        //lab=new JLabel("目前沒有東西！",icon1,JLabel.CENTER);
        lab=new JLabel("目前沒有東西！");
        show[0]=new String("這是招牌一");
        show[1]=new String("這是招牌二");
        show[2]=new String("這是招牌三");
        c.add(bot0);
        c.add(bot1);
        c.add(bot2);
        c.add(lab);
        bot0.addActionListener(this);
        bot1.addActionListener(this);
        bot2.addActionListener(this);
        setSize(400,400);
        setVisible(true);
    }
    public void paint(Graphics g)
    {
        super.paint(g);
    }
    /***按鈕事件的傾聽方法****/
    public void actionPerformed(ActionEvent e) //按鈕事件的處理方法
    { 
        if (e.getSource()==bot1)
        {
            cpcnt=(cpcnt+1)%3;
            lab.setText(show[cpcnt]);
        }
        else if (e.getSource()==bot2)
        {
            gpcnt=(gpcnt+1)%9+1;
            icon1 = new ImageIcon("bridge/0"+gpcnt+".GIF");
            //System.out.println("bridge/0"+gpcnt+".GIF");
            lab.setIcon(icon1);
        }
        else if (e.getSource()==bot0)
        {
            System.exit(0);
        }
        repaint();
    }

    public static void main(String args[]) //程式起點
    {
        ui21 app=new ui21(); //畫圖
        //處理視窗關閉要求
        app.addWindowListener(
             new WindowAdapter()
             {
                public void windowClosing(WindowEvent e)
                {  System.exit(0);}
             });
    }
}