Loops
ï??Using for loops, Write a program to simulate a clock countdown. The program prompts the user to enter the number of seconds, displays a message at every second, and terminates when the time expires. Use method System.currentTimeMillis() which return the number of milliseconds since the epoch (which is midnight Jan 1st 1970 UTC).
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February 9, 2012 at 4:16 PM
import java.util.*;
class clock
{
public static void main(String args[])
{
Scanner input=new Scanner(System.in);
System.out.print("Enter number of seconds: ");
int s = input.nextInt();
long milliseconds=System.currentTimeMillis();
Calendar cal=new GregorianCalendar();
cal.setTimeInMillis(milliseconds) ;
int hour = cal.get(Calendar.HOUR);
int minutes = cal.get(Calendar.MINUTE);
int sec=0;
for(sec=0;sec<=s;sec++){
System.out.print(hour+":"+ minutes+":"+sec);
try{
Thread.sleep(1000);
System.out.print("\r");
}
catch(Exception e){}
}
}
}
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