Java Digital Watch

by Online Tutorials Library July 14, 2022

Example of digital clock in swing:

  import javax.swing.*; import java.awt.*; import java.text.*; import java.util.*; public class DigitalWatch implements Runnable{ JFrame f; Thread t=null; int hours=0, minutes=0, seconds=0; String timeString = “”; JButton b;  DigitalWatch(){ f=new JFrame();  t = new Thread(this);         t.start();  b=new JButton();         b.setBounds(100,100,100,50);  f.add(b); f.setSize(300,400); f.setLayout(null); f.setVisible(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”);             Date date = cal.getTime();             timeString = formatter.format( date );              printTime();              t.sleep( 1000 );  // interval given in milliseconds          }       }       catch (Exception e) { }  }  public void printTime(){ b.setText(timeString); }  public static void main(String[] args) { new DigitalWatch();           } }  

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