Analog clock in Applet

by Online Tutorials Library July 22, 2022

Analog clock in Applet

Analog clock can be created by using the Math class. Let’s see the simple example:

Example of Analog clock in Applet:

  import java.applet.*; import java.awt.*; import java.util.*; import java.text.*;  public class MyClock extends Applet implements Runnable {     int width, height;    Thread t = null;    boolean threadSuspended;    int hours=0, minutes=0, seconds=0;    String timeString = “”;     public void init() {       width = getSize().width;       height = getSize().height;       setBackground( Color.black );    }     public void start() {       if ( t == null ) {          t = new Thread( this );          t.setPriority( Thread.MIN_PRIORITY );          threadSuspended = false;          t.start();       }       else {          if ( threadSuspended ) {             threadSuspended = false;             synchronized( this ) {                notify();             }          }       }    }     public void stop() {       threadSuspended = true;    }     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”, Locale.getDefault() );             Date date = cal.getTime();             timeString = formatter.format( date );              // Now the thread checks to see if it should suspend itself             if ( threadSuspended ) {                synchronized( this ) {                   while ( threadSuspended ) {                      wait();                   }                }             }             repaint();             t.sleep( 1000 );  // interval specified in milliseconds          }       }       catch (Exception e) { }    }     void drawHand( double angle, int radius, Graphics g ) {       angle -= 0.5 * Math.PI;       int x = (int)( radius*Math.cos(angle) );       int y = (int)( radius*Math.sin(angle) );       g.drawLine( width/2, height/2, width/2 + x, height/2 + y );    }     void drawWedge( double angle, int radius, Graphics g ) {       angle -= 0.5 * Math.PI;       int x = (int)( radius*Math.cos(angle) );       int y = (int)( radius*Math.sin(angle) );       angle += 2*Math.PI/3;       int x2 = (int)( 5*Math.cos(angle) );       int y2 = (int)( 5*Math.sin(angle) );       angle += 2*Math.PI/3;       int x3 = (int)( 5*Math.cos(angle) );       int y3 = (int)( 5*Math.sin(angle) );       g.drawLine( width/2+x2, height/2+y2, width/2 + x, height/2 + y );       g.drawLine( width/2+x3, height/2+y3, width/2 + x, height/2 + y );       g.drawLine( width/2+x2, height/2+y2, width/2 + x3, height/2 + y3 );    }     public void paint( Graphics g ) {       g.setColor( Color.gray );       drawWedge( 2*Math.PI * hours / 12, width/5, g );       drawWedge( 2*Math.PI * minutes / 60, width/3, g );       drawHand( 2*Math.PI * seconds / 60, width/2, g );       g.setColor( Color.white );       g.drawString( timeString, 10, height-10 );    } } 

myapplet.html

  <html> <body> <applet code=”MyClock.class” width=”300″ height=”300″> </applet> </body> </html>  

download this example.

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Analog clock in Applet

Analog clock in Applet

Example of Analog clock in Applet:

myapplet.html

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