shanjian.java

学习java 自己开发的企业管理系统,适合初学者

package zhican;
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.BorderLayout;
import java.awt.event.WindowListener;
import java.awt.event.WindowEvent;
import java.util.Date;
import java.text.SimpleDateFormat;
class ClockFrame extends JFrame implements Runnable,WindowListener
{
        private Thread timer=null;
        private JLabel jLabel=null;
        private SimpleDateFormat sdf=null;
        private boolean go;

        public ClockFrame()
        {
                super("时间");

                sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
                Date now=new Date();

                jLabel=new JLabel("       "+sdf.format(now));
                getContentPane().add(jLabel,BorderLayout.CENTER);
                addWindowListener(this);
                setSize(120,80);
                setLocation(300,200);

                go=true;
                timer=new Thread(this);
                timer.start();
        try {
            jbInit();
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }

        public void run()
        {
                while(go)
                {
                        try
                        {
                                timer.sleep(1000);
                        }catch(InterruptedException e){
                                e.printStackTrace();
                        }finally
                        {
                                jLabel.setText("       "+sdf.format(new Date()));
                        }
                }
        }
        public void windowActivated(WindowEvent e){}
        public void windowClosed(WindowEvent e){}
        public void windowClosing(WindowEvent e){
                go=false;
                setVisible(false);
        }
        public void windowDeactivated(WindowEvent e){}
        public void windowDeiconified(WindowEvent e){}
        public void windowIconified(WindowEvent e){}
        public void windowOpened(WindowEvent e){}

        public static void main(String args[])
        {
                new ClockFrame().setVisible(true);
        }

    private void jbInit() throws Exception {
    }
};