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How to display clock using Applet in Java
Problem Description
How to display clock using Applet?
Solution
Following example demonstrates how to display a clock using valueOf() methods of String Class. & using Calender class to get the second, minutes & hours.
import java.awt.*; import java.applet.*; import java.applet.*; import java.awt.*; import java.util.*; public class ClockApplet extends Applet implements Runnable { Thread t,t1; public void start() { t = new Thread(this); t.start(); } public void run() { t1 = Thread.currentThread(); while(t1 == t) { repaint(); try { t1.sleep(1000); } catch(InterruptedException e){} } } public void paint(Graphics g) { Calendar cal = new GregorianCalendar(); String hour = String.valueOf(cal.get(Calendar.HOUR)); String minute = String.valueOf(cal.get(Calendar.MINUTE)); String second = String.valueOf(cal.get(Calendar.SECOND)); g.drawString(hour + ":" + minute + ":" + second, 20, 30); } }
Result
The above code sample will produce the following result in a java enabled web browser.
View in Browser.
The following is an another sample example to display clock using Applet.
import java.applet.*; import java.awt.*; import java.util.*; import java.text.*; public class javaApplication6 extends Applet implements Runnable { Thread t1 = null; int hours = 0, minutes = 0, seconds = 0; String time = ""; public void init() { setBackground( Color.green); } public void start() { t1 = new Thread( this ); t1.start(); } public void run() { try { while (true) { Calendar cal = Calendar.getInstance(); hours = cal.get( Calendar.HOUR_OF_DAY ); if ( hours > 12 ) hours -= 12; minutes = cal.get( Calendar.MINUTE ); seconds = cal.get( Calendar.SECOND ); SimpleDateFormat formatter = new SimpleDateFormat("hh:mm:ss"); Date d = cal.getTime(); time = formatter.format( d ); repaint(); t1.sleep( 1000 ); } } catch (Exception e) { } } public void paint( Graphics g ) { g.setColor( Color.blue ); g.drawString( time, 50, 50 ); } }
java_applets.htm
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