Repeating Countdown Timer

[Andreas L. Berg]

Hi there,

my Girlfriend wants to do some exercises at home and asks me for an app for that ;o)
It should do simply "give me Time1 (e.g. 30Secs), Time 2 (40Secs.)and so on, after Time 1 get a system beep out and begin to count down Time2 and so on"
So as much i understand, not that complicated. Ok i googeld a bit for the Timer issue and the AudioOut (i did not do both before, im a real Greenhorn) and found at least waht i need (i guess).

Now i have put all of them together and it looks not that bad (i guess again ;o) )
For the Timer i want to use a Array, it seemed to be the easiest way but there a have a mistake and i don´t get what i did wrong.
Everything looks fine, just that the Array Slot wont count up in the for loop. Im hanging at there, can someone have a look on it and give me a hint please? (Eclipse don´t let me just write [j] it has to be timer[j]……)

package FitFu;

import java.util.Timer;
import java.util.TimerTask;
import java.util.Scanner;
import java.awt.Toolkit;

public class Reminder {
	Timer timer;

	public Reminder(int seconds) {
		timer = new Timer();
		timer.schedule(new RemindTask(), seconds * 1000);
	}

	class RemindTask extends TimerTask {
		public void run() {
			System.out.print("Zeit vorbei");
			System.out.flush();
			Toolkit.getDefaultToolkit().beep();
			timer.cancel();
		}
	}

	public static void main(String args[]) {
		Scanner scan = new Scanner(System.in);
		int[] timer = new int[3];
		boolean running = true;

		while (running) {
			for (int j = 0; j < timer.length; j++) {
				System.out.println("Gib Sekunden fuer Timer " + timer[j] + " ein ");
				int eingabe = scan.nextInt();
				timer[j] = eingabe;
				scan.nextLine();
			}
			for (int i = 0; i < timer.length; i++) {
				new Reminder(timer[i]);
				System.out.println("Zeit laueft");
			}
			running = false;
		}

		scan.close();
	}
}

ok ok i found it,
i had to do

timer[j] = j;

and get the while loop out of it, makes no sense and breaks the process after the first run, but now the Timer don´t recognize the time…… ;o(

[Andreas L. Berg]

Me again,

after all i saw that calling the Array also Timer, is not that smart, so i changed that to and paste the changed code in here again.

package FitFu;

import java.util.Timer;
import java.util.TimerTask;
import java.util.Scanner;
import java.awt.Toolkit;

public class Reminder {
	Timer timer;

	public Reminder(int seconds) {
		timer = new Timer();
		timer.schedule(new RemindTask(), seconds * 1000);
	}

	class RemindTask extends TimerTask {
		public void run() {
			System.out.println("Zeit vorbei");
			System.out.flush();
			Toolkit.getDefaultToolkit().beep();
			timer.cancel();
		}
	}

	public static void main(String args[]) {
		Scanner scan = new Scanner(System.in);
		int[] zeit = new int[3];

		for (int j = 0; j < zeit.length; j++) {
			zeit[j] = j;
			System.out.println("Gib Sekunden fuer Timer" + zeit[j] + " ein ");
			int eingabe = scan.nextInt();
			zeit[j] = eingabe;
			scan.nextLine();
		}
		for (int i = 0; i < zeit.length; i++) {
			zeit[i] = i;
			new Reminder(zeit[i]);
			System.out.println("Zeit laueft");
		}
		scan.close();
	}
}

[Vijay Vishwa]

Hi Andreas,
From you problem statement I understand that the time should be sequential i.e. Suppose 3 timers 10sec, 15sec, 28sec , ..
First time should count 10 sec. After 10 sec is done there is beep and next time should start and count 15sec.

Is this you want?

If this is the one, then I see that all the timers are starting at same time, i.e. there is overlap
Form the above example
All timers 10, 15, 20 start at same time
First beep is heard at 10, next at 5 sec and third at 3 sec.

The solution could be that the while creating the Reminder, add up the previous timer

while (running) {   
            for (int j = 0; j < timer.length; j++) {   
                System.out.println("Gib Sekunden fuer Timer " + timer[j] + " ein ");   
                int eingabe = scan.nextInt();   
                timer[j] = eingabe;   
                scan.nextLine();   
            }   
            int timerSum =0; //variable holding sum of timer
            for (int i = 0; i < timer.length; i++) {   
            	timerSum = timerSum + timer[i];
                Reminder d = new Reminder(timerSum);   //create the Reminder by adding aup all the timers.
                System.out.println("Zeit laueft");   
            }   
            running = false;   
        }   

Let me know if I interpreted it wrongly.

[Andreas L. Berg]

First time should count 10 sec. After 10 sec is done there is beep and next time should start and count 15sec.

Is this you want?

Yes, exactly thats what i (or better my Girlfriend) want ;o)

For better understanding, i paste the Code again. I really don't know if i understood right what you changed, but it has not the healing effect i hoped.
Maybe (as i said im really new to that stuff) i just don´t get the whole thing that is for others obvious. Sorry. But coul you explain.

package FitFu;

import java.util.Timer;
import java.util.TimerTask;
import java.util.Scanner;
import java.awt.Toolkit;

public class Reminder {
	Timer timer;

	public Reminder(int seconds) {
		timer = new Timer();
		timer.schedule(new RemindTask(), seconds * 1000);
	}

	class RemindTask extends TimerTask {
		public void run() {
			System.out.println("Zeit vorbei");
			System.out.flush();
			Toolkit.getDefaultToolkit().beep();
			timer.cancel();
		}
	}

	public static void main(String args[]) {
		Scanner scan = new Scanner(System.in);
		int[] zeit = new int[3];
		boolean running = true;

		while (running) {
		for (int j = 0; j < zeit.length; j++) {
			zeit[j] = j;
			System.out.println("Gib Sekunden fuer Timer" + zeit[j] + " ein ");
			int eingabe = scan.nextInt();
			zeit[j] = eingabe;
			scan.nextLine();
		}
		int zeitSum = 0;
		for (int i = 0; i < zeit.length; i++) {
			zeit[i] = i;
			Reminder d = new Reminder(zeitSum);
			System.out.println("Zeit "+ i + " Sec. laueft");
		}
		running = false;
		}
		scan.close();
	}
}

upsi ;o)

i forget to integrate the line
"zeitSum = zeitSum + zeit[i];"

now it works, but i still dont know why……

[Andreas L. Berg]

Well…… i was proud, showed it my Girlfriend and where disappointed……

What she really wants is:

1. Tell the whole Time (lets say 12 Minutes)
2. Give me the first Time (e.g. 10 Seconds)
3. Give me the second Time (e.g. 30 Seconds)

after that

in duration of 12Minutes should be after 10 Secs a beep, then after 30 Secs, then 10, then30 and so on……… until the value of (here) 12 Minutes are reached.

And after this point im overstrained, if you Guys dont give me a hint how i should solve that riddle……

[Andreas L. Berg]

After all i tried and as much i could puzzle out you can see in the code down.
I assume im not as far from the solution away but i did not found the real clue yet.

package FitFu;

import java.util.Timer;
import java.util.TimerTask;
import java.util.Scanner;
import java.awt.Toolkit;

public class Fitness {
	Timer timer;

	public Fitness(int seconds) {
		timer = new Timer();
		timer.schedule(new RemindTask(), seconds * 1000);
	}

	class RemindTask extends TimerTask {
		public void run() {
			System.out.println("Zeit vorbei");
			System.out.flush();
			Toolkit.getDefaultToolkit().beep();
			timer.cancel();
		}
	}

	public static void main(String args[]) {
		Scanner scan = new Scanner(System.in);
		int gesamt = 0;
		System.out.println("Gib mir die Geamtzeit");
		int dauer = scan.nextInt();
		scan.nextLine();

		System.out.println("Gib mir die Zeit 1");
		int zeit1 = scan.nextInt();
		scan.nextLine();

		System.out.println("Gib mir die Zeit 2");
		int zeit2 = scan.nextInt();
		scan.nextLine();
		int zeitSum = 0; 
		
		while (gesamt < dauer) {
			Reminder c = new Reminder(dauer);
			while (zeitSum<dauer) {
				zeitSum = zeitSum + zeit1 + zeit2;
				gesamt = gesamt + zeitSum;
				Reminder a = new Reminder(zeit1);
				Reminder b = new Reminder(zeit2);
			}
			System.out.println("Zeit " + zeit1 + " Sec. laueft");
			System.out.println("Zeit " + zeit2 + " Sec. laueft");
		}
		scan.close();
	}
}

>

[Michael Dunn]

don't know what all the scanner and println stuff is for, but to get just a beep every 10 then 30 seconds,
this is about all you'd need (will beep at 1,4,5,8,9,12,13 etc seconds - multiply by 10 where indicated to get 10,40,50,80 etc)

class Beeper
{
  int counter = 1;
  public Beeper()
  {
    final java.util.Timer timer = new java.util.Timer();
    timer.scheduleAtFixedRate(new java.util.TimerTask(){
      public void run(){
        int trigger = counter % 4;
        if(trigger == 0 || trigger == 1) java.awt.Toolkit.getDefaultToolkit().beep();
        counter++;
        if(counter > 72) timer.cancel();
      }
    },1000,1000);//test, then change to 10000,10000 (for 10 second blocks)
  }
  public static void main(String[] args)
  {
    new Beeper();
  }
}