How to refresh screen ?

Question

im doing a stop watch application
and i want the numbers on the form to change

Answer 1

sorry :-)here is the code
mport javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class stopWatchMIDlet extends javax.microedition.midlet.MIDlet implements CommandListener {
private Display display;
private Form watch;
private Form stopF;
private Form rrF;
private Form resumeF;
private Form resetF;
private Command exitCommand;
private Command start;
private Command stop;
private Command reset;
private Command resume;
private Ticker ticker = new Ticker("My stopwatch");
int hrs=0;
int min=0;
int sec=0;
boolean running=true;
StringItem time;
StringItem timeRR;
StringItem timeRe;
StringItem timeS;
StringItem timeRm;
Thread begin;
int count=0;
public stopWatchMIDlet(){
display=Display.getDisplay(this);
exitCommand=new Command("Exit",Command.EXIT,1);
start=new Command("start",Command.OK,1);
stop=new Command("stop",Command.OK,1);
reset=new Command("reset",Command.BACK,1);
resume=new Command("resume",Command.BACK,1);
watch=new Form("");
stopF=new Form("");
rrF=new Form("");
resetF=new Form("");
resumeF=new Form("");
watch.setTicker(ticker);
stopF.setTicker(ticker);
rrF.setTicker(ticker);
resetF.setTicker(ticker);
resumeF.setTicker(ticker);
time=new StringItem(""," "+hrs+":"+min+":"+sec);
timeRm=new StringItem(""," "+hrs+":"+min+":"+sec);
timeRR=new StringItem(""," "+hrs+":"+min+":"+sec);
timeS=new StringItem(""," "+hrs+":"+min+":"+sec);
timeRe=new StringItem(""," "+hrs+":"+min+":"+sec);
watch.append("\n");
watch.append("\n");
watch.append("\n");
watch.append(time);
watch.addCommand(start);
watch.setCommandListener(this);
stopF.append("\n");
stopF.append("\n");
stopF.append("\n");
stopF.addCommand(stop);
stopF.setCommandListener(this);
rrF.append("\n");
rrF.append("\n");
rrF.append("\n");
rrF.addCommand(reset);
rrF.addCommand(resume);
rrF.setCommandListener(this);
resetF.append("\n");
resetF.append("\n");
resetF.append("\n");
resetF.addCommand(exitCommand);
resetF.addCommand(start);
resetF.setCommandListener(this);
resumeF.append("\n");
resumeF.append("\n");
resumeF.append("\n");
resumeF.addCommand(exitCommand);
resumeF.addCommand(reset);
resumeF.setCommandListener(this);
public void startApp() {
display.setCurrent(watch);
public void pauseApp() {
public void destroyApp(boolean unconditional) {
public void commandAction(Command c,Displayable s){
if(c==exitCommand){
destroyApp(false);
notifyDestroyed();
if(c==start){
stopF.append(timeS);
display.setCurrent(stopF);
startWatch();
if(c==stop){
running=false;
rrF.append(timeRR);
display.setCurrent(rrF);
if(c==reset){
hrs=0;
min=0;
sec=0;
timeS.setText(" "+hrs+":"+min+":"+sec);
display.setCurrent(watch);
count=1;
if(c==resume){
running=true;
startWatch();
display.setCurrent(stopF);
public void startWatch(){
begin=new Thread(){
public void run(){
while(running){
try{
sec+=1;
if(sec==60){
sec=0;
min+=1;
if(min==60){
min=0;
hrs+=1;
if(hrs==24){
hrs=0;
Thread.sleep(1000);
timeS.setText(" "+hrs+":"+min+":"+sec);
timeRR.setText(" "+hrs+":"+min+":"+sec);
timeRm.setText(" "+hrs+":"+min+":"+sec);
}catch(Exception e){}
};begin.start();