Have an on-screen clock (this howto is deprecated)Tag(s): DEPRECATED
import java.applet.*; import java.awt.*; import java.util.*; import java.text.*; public class MyClock extends Applet { MyPanel mp; public void init() { mp = new MyPanel(getParameter("format")); add(mp); } } class MyPanel extends Panel { MyClockThread mct; Color b, f; SimpleDateFormat formatter; String previousDateText = ""; String dateText; MyPanel(String df) { super(); formatter = new SimpleDateFormat(df); validate(); setBackground(new Color(0).black); setForeground(new Color(0).yellow); b = this.getBackground(); f = this.getForeground(); mct = new MyClockThread(this); mct.start(); } public Dimension getPreferredSize() { return new Dimension (this.getFontMetrics(this.getFont()).stringWidth(getNow()) + 25, 30); } public void paint(Graphics g) { if (g != null) { g.setColor(b); g.drawString(previousDateText,10,15); g.setColor(f); dateText = getNow(); g.drawString(dateText,10,15); previousDateText = dateText; } } public String getNow() { return formatter.format(new Date()); } } class MyClockThread extends Thread { MyPanel mp; public MyClockThread(MyPanel a) { mp = a; } public void run() { while (true) { try { mp.repaint(); this.sleep(1000); } catch(InterruptedException e) { } } } }
<HTML><HEAD></HEAD><BODY> <APPLET CODE="MyClock.class" HEIGHT=25 WIDTH=200> <PARAM NAME="format" VALUE="yyyy-MM-dd hh:mm:ss"> </APPLET><P> <APPLET CODE="MyClock.class" HEIGHT=25 WIDTH=200> <PARAM NAME="format" VALUE="h:mm a"> </APPLET><P> <APPLET CODE="MyClock.class" HEIGHT=25 WIDTH=200> <PARAM NAME="format" VALUE="yyyy.MMMMM.dd GGG hh:mm aaa"> </APPLET><P> <APPLET CODE="MyClock.class" HEIGHT=25 WIDTH=200> <PARAM NAME="format" VALUE="H:mm:ss:SSS"> </APPLET><P> </BODY></HTML>