实现个RUNABLE接口,用线程不停的刷新
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import java.awt.*;
import java.awt.event.*;
import java.io.InterruptedIOException;public class Lottery extends JFrame implements Runnable
{
private JLabel m_l_number = new JLabel("8888");
private JButton m_b_start = new JButton("start");
Thread thread;
private boolean m_flag = true; public Lottery()
{
GridBagLayout gbl = new GridBagLayout();
Container c = getContentPane();
c.setLayout(gbl);
thread=new Thread(this);
GridBagConstraints gbc = new GridBagConstraints();
gbc.gridwidth = GridBagConstraints.REMAINDER; gbc.fill = GridBagConstraints.BOTH;
c.add(this.m_l_number,gbc);
m_l_number.setFont(new Font("Arial",Font.BOLD,96)); gbc.fill = GridBagConstraints.NONE;
c.add(this.m_b_start,gbc);
m_b_start.setFont(new Font("Arial",Font.PLAIN,12)); m_b_start.addMouseListener(new MouseListener(){ public void mouseClicked(MouseEvent e)
{
}
public void mousePressed(MouseEvent e)
{
}
public void mouseReleased(MouseEvent e)
{
m_b_start.setText("stop");
thread.start();
}
public void mouseEntered(MouseEvent e)
{
}
public void mouseExited(MouseEvent e)
{ }
}); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setTitle("Lottery");
setSize(320,320);
show();
} public void refresh()
{
this.getRootPane().updateUI();
this.m_b_start.updateUI();
this.m_l_number.updateUI();
} public void run()
{
java.util.Random rand = new java.util.Random();
int number = 0;
try {
while (m_flag) {
number = (int) (rand.nextDouble() * 1000);
System.out.println(number);
m_l_number.setText(String.valueOf(number));
Thread.sleep(1000);
//m_flag = true;
}
}catch(Exception e){}
} public static void main(String[] args)
{
Lottery l = new Lottery();
}
}