Java Java Timer (stopwatch)

50506759

App Name: Java timer

Knowledge used: Java GUI programming

Development environment: win8+eclipse+jdk1.8

Function Description: Chronograph function, accurate to 1 milliseconds, can be paused.

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Source:

Importjavax.swing.*; Importjava.awt.HeadlessException; Importjava.awt.BorderLayout; Importjava.awt.FlowLayout; ImportJava.awt.Font; ImportJava.awt.event.ActionListener; Importjava.awt.event.ActionEvent; /*** Timer*/   Public classTimerextendsJFrame {/**     *      */    Private Static Final LongSerialversionuid = 1L; Private Static FinalString initial_label_text = "00:00:00 000"; //Count Thread    PrivateCountingthread thread =NewCountingthread (); //Log program start time    Private LongProgramstart =System.currenttimemillis (); //The program was suspended at first.    Private LongPausestart =Programstart; //Total time The program was paused    Private LongPausecount = 0; PrivateJLabel label =NewJLabel (Initial_label_text); PrivateJButton Startpausebutton =NewJButton ("Start"); PrivateJButton Resetbutton =NewJButton ("Qing 0"); PrivateActionListener Startpausebuttonlistener =NewActionListener () { Public voidactionperformed (ActionEvent e) {if(thread.stopped) {Pausecount+ = (System.currenttimemillis ()-Pausestart); thread.stopped=false; Startpausebutton.settext (Pause); } Else{Pausestart=System.currenttimemillis (); thread.stopped=true; Startpausebutton.settext (Continue to);         }          }      }; PrivateActionListener Resetbuttonlistener =NewActionListener () { Public voidactionperformed (ActionEvent e) {Pausestart=Programstart; Pausecount= 0; thread.stopped=true;              Label.settext (Initial_label_text); Startpausebutton.settext (Start);         }      };  PublicTimer (String title)throwsheadlessexception {Super(title);          Setdefaultcloseoperation (Exit_on_close); SetLocation (300, 300); Setresizable (false);          Setupborder ();          Setuplabel ();             Setupbuttonspanel ();          Startpausebutton.addactionlistener (Startpausebuttonlistener);             Resetbutton.addactionlistener (Resetbuttonlistener); Thread.Start (); //The Count thread has been running    }         //add a border to the form panel    Private voidSetupborder () {JPanel ContentPane=NewJPanel (NewBorderLayout ()); Contentpane.setborder (Borderfactory.createemptyborder (5, 5, 5, 5));  This. Setcontentpane (ContentPane); }         //Configure button    Private voidSetupbuttonspanel () {JPanel panel=NewJPanel (NewFlowLayout ());          Panel.add (Startpausebutton);          Panel.add (Resetbutton);      Add (Panel, Borderlayout.south); }         //Configure Labels    Private voidSetuplabel () {label.sethorizontalalignment (swingconstants.center); Label.setfont (NewFont (Label.getfont (). GetName (), Label.getfont (). GetStyle (), 40));  This. Add (label, Borderlayout.center); }         //Program Entry     Public Static voidMain (string[] args) {Try{Uimanager.setlookandfeel (Uimanager.getsystemlookandfeelclassname ()); } Catch(Exception e) {e.printstacktrace (); } Timer Frame=NewTimer ("Timer");          Frame.pack (); Frame.setvisible (true); }         Private classCountingthreadextendsThread { Public Booleanstopped =true; PrivateCountingthread () {Setdaemon (true); } @Override Public voidrun () { while(true) {                  if(!stopped) {                      Longelapsed = System.currenttimemillis ()-Programstart-Pausecount;                  Label.settext (Format (elapsed)); }                     Try{sleep (1);//1 ms Update display}Catch(interruptedexception e) {e.printstacktrace (); System.exit (1); }              }          }             //format the number of milliseconds        PrivateString Format (Longelapsed) {              inthour, minute, second, Milli; Milli= (int) (Elapsed% 1000); Elapsed= elapsed/1000; Second= (int) (Elapsed% 60); Elapsed= ELAPSED/60; Minute= (int) (Elapsed% 60); Elapsed= ELAPSED/60; Hour= (int) (Elapsed% 60); returnString.Format ("%02d:%02d:%02d%03d", hour, minute, second, Milli); }      }  }  

Java Java Timer (stopwatch)