수다닷컴

자바로짜퓆bsp;짜여진 스탑워치 프로그램 소스입니다.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class stopwatch extends jframe implements actionlistener, runnable
{
container con;
jbutton start,stop,reset;
boolean is;
jpanel top,center;
long hour=0;
long min=0;
long sec=0;
long msec=0;
string time=00 : 00 : 00 . 00;
canvas can;
public stopwatch()
{
init();
setdefaultcloseoperation(exit_on_close);
setsize(300,120);
setvisible(true);
}
public void init()
{
con=getcontentpane();
start=new jbutton(시작);
stop=new jbutton(중지);
reset=new jbutton(재설정);
top=new jpanel();

start.addactionlistener(this);
stop.addactionlistener(this);
reset.addactionlistener(this);
top.add(start);
top.add(stop);
top.add(reset);

con.add(top,north);

}
public void actionperformed(actionevent e)
{
jbutton jb=(jbutton)e.getsource();
if (jb==start)
{
is=true;
}
else if (jb==stop)
{
is=false;
}
else if (jb==reset)
{
resettimes();
}
}
public long minustimes()
{

long total=(hour*60*60*100)+(min*60*100)+(sec*100)+msec+1;
if (total=0)
{
is=false;
}
return total;
}
public void resettimes()
{
hour=0;
min=0;
sec=0;
msec=0;
time=00 : 00 : 00 . 00;
is=false;
repaint();
}

public void settimes()
{
long total=minustimes();

hour=(long)((total/100)/(60*60));
min=(long)((total/100)%(60*60)/60);
sec=(long)((total/100)%(60*60)%60);
msec=(long)(total-((hour*60*60*100)+(min*60*100)+(sec*100)));

string []times=new string[4];
times[0]=hour+;
times[1]=min+;
times[2]=sec+;
times[3]=msec+;
for (int i=0; i times.length ; ++i )
{
if (times[i].length()2)
{
times[i]=0+times[i];
}
}
time=times[0]+ : +times[1]+ : +times[2]+ . +times[3];
}
public void paint(graphics g)
{
g=getgraphics();

g.setcolor(color.white);
g.fillrect(0,70,400,100);
g.setcolor(color.black);
g.drawstring(time,100,100);
top.updateui();
}
public void run()
{
while (true)
{
if (is)
{
try
{
settimes();
repaint();
thread.sleep(10);
}
catch (exception e)
{
}
}
}
}
public static void main(string[] args)
{
new thread(new stopwatch()).start();
}
}


각 소스마다 설명좀 부탁드립니다ㅠㅠㅠ좀 급해요ㅠㅠㅠㅠㅠ

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