Develop an alarm clock that is a graphical user interface that allows the user t

Question

Develop an alarm clock that is a graphical user interface that allows the user to select a radio button for AM or PM and then input the hour and minute they wish the alarm to go off. You will have two buttons, the Set Alarm button prints to a label the time including AM or PM the alarm is set for. The clear button just clears the label.

Java Programming with proper commenting.

Explanation / Answer

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 );      }   }

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