Java Implementation Clock Method summary

Import Java.awt.dimension;import java.text.simpledateformat;import Java.util.calendar;import Java.util.Date;import Java.util.timer;import Java.util.timertask;import Javax.swing.jframe;import Javax.swing.jlabel;import javax.swing.jpanel;//First Comparison recommendation: public class Timeframe extends jframe{*/* Variables * private JPanel timepanel; private J Label TimeLabel; Private JLabel Displayarea; Private String Default_time_format = "HH:mm:ss"; Private String time;   private int one_second = 1000; Public timeframe () {Timepanel = new JPanel (); TimeLabel = new JLabel ("CurrentTime:");   Displayarea = new JLabel ();   Configtimearea (); Timepanel.add (TimeLabel); Timepanel.add (Displayarea); This.add (Timepanel); This.setdefaultcloseoperation (Exit_on_close); This.setsize (New Dimension (200,70)); This.setlocationrelativeto (NULL); }/** * This method creates a timer task to update the time per second */private void Configtimearea () {Timer TMR = NE W Timer (); Tmr.scheduleatfixedrate (New Jlabeltimertask (), NewDate (), One_second); }/** * Timer task to update the time display area * */protected class Jlabeltimertask extends timertask{simpledatefor Mat dateformatter = new SimpleDateFormat (Default_time_format);  @Override public void Run () {time = Dateformatter.format (Calendar.getinstance (). GetTime ()); Displayarea.settext (time);  }} public static void Main (String arg[]) {timeframe timeframe=new timeframe (); timeframe.setvisible (true); } }

Import Java.awt.dimension;import java.text.simpledateformat;import java.util.calendar;import javax.swing.JFrame; Import Javax.swing.jlabel;import javax.swing.jpanel;//Second public class DTimeFrame2 extends JFrame implements runnable{ Private JFrame frame; Private JPanel Timepanel; Private JLabel TimeLabel; Private JLabel Displayarea; Private String Default_time_format = "HH:mm:ss";   private int one_second = 1000; Public DTimeFrame2 () {timepanel = new JPanel (); TimeLabel = new JLabel ("CurrentTime:");   Displayarea = new JLabel (); Timepanel.add (TimeLabel); Timepanel.add (Displayarea); This.add (Timepanel); This.setdefaultcloseoperation (Exit_on_close); This.setsize (New Dimension (200,70)); This.setlocationrelativeto (NULL);  public void Run () {while (true) {SimpleDateFormat dateformatter = new SimpleDateFormat (Default_time_format);  Displayarea.settext (Dateformatter.format (Calendar.getinstance (). GetTime ()));   try {thread.sleep (one_second); } catch (Exception e) {displayarea.seTtext ("Error!!!");   }}} public static void Main (String arg[]) {DTimeFrame2 df2=new DTimeFrame2 (); df2.setvisible (true); Thread thread1=new thread (DF2);  Thread1.start (); } }

Import Java.awt.borderlayout;import Java.awt.event.actionevent;import Java.awt.event.actionlistener;import Java.text.simpledateformat;import Java.util.calendar;import Java.util.date;import Java.util.Locale;import Java.util.timezone;import Java.util.timer;import Java.util.timertask;import Javax.swing.DefaultComboBoxModel; Import Javax.swing.jcombobox;import javax.swing.jframe;import Javax.swing.jlabel;import javax.swing.JPanel;// Third: Multi-country clock implementation public class Worldtimeframe extends jframe{/** * */private static final long Serialversionuid = 4782486524987   801209L; Private String time; Private JPanel Timepanel; Private TimeZone timezone;//time zone private JComboBox zonebox;   Private JLabel Displayarea; private int one_second = 1000;   Private String Default_format = "EEE d MMM, HH:mm:ss"; Public Worldtimeframe () {zonebox = new JComboBox (); timepanel = new JPanel (); displayarea = new JLabel (); TimeZone = time   Zone.getdefault (); Zonebox.setmodel (New DefaultComboBoxModel (Timezone.getavailableids ())); Zonebox.addactionlistener (new ActionListener () {@Override public void actionperformed (ActionEvent e) {Updatetimezone (  Timezone.gettimezone (String) Zonebox.getselecteditem ());   }    });   Configtimearea (); Timepanel.add (Displayarea); This.setlayout (New BorderLayout ()); This.add (Zonebox, Borderlayout.north); This.add (Timepanel, Borderlayout.center); This.setlocationrelativeto (NULL); This.setdefaultcloseoperation (Exit_on_close); This.setvisible (TRUE); Pack (); }/** * This method creates a timer task to update the time per second */private void Configtimearea () {Timer TMR = NE W Timer (); Tmr.scheduleatfixedrate (New Jlabeltimertask (), New Date (), One_second);  }/** * Timer task to update the time display area * */public class Jlabeltimertask extends timertask{SimpleDateFormat Dateformatter = new SimpleDateFormat (Default_format, locale.english);  @Override public void Run () {dateformatter.settimezone (timeZone); Time = Dateformatter.format (Calendar.getinstance (). GetTime ());  Displayarea.settext (time); }}/** * Update the TimeZone * @param newzone */public void Updatetimezone (TimeZone newzone) {this.timezone = Newzone ; } public static void Main (String arg[]) {new Worldtimeframe ();}}

　　

Java Implementation Clock Method summary