Thread: Need some help in a timer

javax.swing.Timer is not appropriate for what you're doing. I won't explain why here, but if you're interested, read the API.

The java.util.Timer and an accompanying TimerTask is what you should use. Here's an example of code that creates an instance of a TimerTask and Timer to do what you've described. See if you can write the accompanying TimerTask class. Hint: It looks somewhat like your actionPerformed() method but as a run() method in another class.

        // countingTask is a TimerTask that simply displays a count 1, 2, 3, . . . 
        CountingTask countingTask = new CountingTask();
 
        // create a Timer object
        Timer countTimer = new Timer();
 
        // schedule the countTimer to do the countingTask every second
        // after a 0-second delay
        countTimer.scheduleAtFixedRate( countingTask, 0L, 1000L );

package cupTimer;
 
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.GregorianCalendar;
import javax.swing.* ;
 
public class myTimer {
 
	public static void main(String[] args) {
		long tempoEmMs = System.currentTimeMillis() ;
		System.out.println ("The time is: " + tempoEmMs);
 
	GregorianCalendar today = new GregorianCalendar();
	int day =today.get(GregorianCalendar.DAY_OF_MONTH);
	int month =today.get(GregorianCalendar.MONTH);
	int year =today.get(GregorianCalendar.YEAR);
	System.out.println ("The day of today is: " + day + "/" + month + "/" + year);
 
	GregorianCalendar cup = new GregorianCalendar(2014,5,12);
	long thisTimeInMs = cup.getTimeInMillis();
	System.out.println ((thisTimeInMs - tempoEmMs) / 86400000) ;
	System.out.println ((thisTimeInMs - tempoEmMs) / 2073600000) ;
	int dayCup = cup.get(GregorianCalendar.DAY_OF_MONTH);
	int monthCup = cup.get(GregorianCalendar.MONTH);
	int yearCup = cup.get(GregorianCalendar.YEAR);
	System.out.println ("Cup day: " + dayCup + "/" + monthCup + "/" + yearCup) ;
 
	//timer attempt 1 //	
	int delay = 1000; //milliseconds
	  ActionListener taskPerformer = new ActionListener() {
	      public void actionPerformed(ActionEvent evt) {
	          System.out.println("Teste");
 
	      }
	  };
	  new Timer(delay, taskPerformer).start();
	}
 
}

Is the code i'm having problem with.
It shows no error, but won't work at all...

Anywhere I could put the Thread would bug the code...
The code executes, and display the info

The time is: 1398620173865
The day of today is: 27/3/2014
45
1
Cup day: 12/5/2014


But it won't execute the last step, posting 'Test1' every second

Yes;
I just couldn't find a way to do it. Having that in mind, I decided to try a simpler script for printing a string every second, which didn't work...
And trying the Thread.sleep is impossible at any line of the code..

Trying to put in one of the last lines:

package cupTimer;
 
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.GregorianCalendar;
import javax.swing.* ;
 
public class myTimer {
 
	public static void main(String[] args) {
		long tempoEmMs = System.currentTimeMillis() ;
		System.out.println ("The time is: " + tempoEmMs);
 
	GregorianCalendar today = new GregorianCalendar();
	int day =today.get(GregorianCalendar.DAY_OF_MONTH);
	int month =today.get(GregorianCalendar.MONTH);
	int year =today.get(GregorianCalendar.YEAR);
	System.out.println ("The day of today is: " + day + "/" + month + "/" + year);
 
	GregorianCalendar cup = new GregorianCalendar(2014,5,12);
	long thisTimeInMs = cup.getTimeInMillis();
	System.out.println ((thisTimeInMs - tempoEmMs) / 86400000) ;
	System.out.println ((thisTimeInMs - tempoEmMs) / 2073600000) ;
	int dayCup = cup.get(GregorianCalendar.DAY_OF_MONTH);
	int monthCup = cup.get(GregorianCalendar.MONTH);
	int yearCup = cup.get(GregorianCalendar.YEAR);
	System.out.println ("Cup day: " + dayCup + "/" + monthCup + "/" + yearCup) ;
 
	//timer attempt 1 //	
	int delay = 1000; //milliseconds
	  ActionListener taskPerformer = new ActionListener() {
	      public void actionPerformed(ActionEvent evt) {
	          System.out.println("Teste");
 
	      }
	  };
	  new Timer(delay, taskPerformer).start();
	} Thread.sleep(100000);
 
}

Gets me Syntax error, missplaced constructor
and Syntax error on token 100000, delete this token

I also tried that, placing right before the ending }
It gives me: Unhandled exception type InterruptedException

I made a smaller code, with only the important information:

package cupTimer;
 
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.GregorianCalendar;
 
import javax.swing.* ;
 
public class myTimer {
 
	public static void main(String[] args) {
		long tempoEmMs = System.currentTimeMillis() ; 
	GregorianCalendar today = new GregorianCalendar(); 
	GregorianCalendar cup = new GregorianCalendar(2014,5,12,0,0);
	long thisTimeInMs = cup.getTimeInMillis();
	long daysLeft = ((thisTimeInMs - tempoEmMs) / 86400000);
	int hoursLeft = (24 - today.get(GregorianCalendar.HOUR_OF_DAY));
	int minutesLeft = (60 - today.get(GregorianCalendar.MINUTE));
	int secondsLeft = (60 - today.get(GregorianCalendar.SECOND));
	final String teste = ("Missing:" + daysLeft + " Days " + hoursLeft + " Hours " + minutesLeft + " Minutes " + secondsLeft + " Seconds");
 
	int delay = 1000; //milliseconds
	  ActionListener taskPerformer = new ActionListener() {
	      public void actionPerformed(ActionEvent evt) {
	          System.out.println(teste);
 
	      }
	  };
	  new Timer(delay, taskPerformer).start();
	  try {
		Thread.sleep(100000);
	} catch (InterruptedException e) {
		e.printStackTrace();
}
	}
 
}

But I can't get it to update the time, it'll only get the information on the final string. How can I use the string without putting the "Final" argument? I need it to use that string, but using the updated and new version of it everytime.

--- Update ---

Replying to the:
"--- Update ---

The String: teste was given a value and it is never changed after that. It will always have the same content."

How can I use the string again with different content?

I made it work with this:

package cupTimer;
 
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.GregorianCalendar;
 
import javax.swing.* ;
 
public class myTimer {
 
	public static void main(String[] args) {
		int delay = 1000; //milliseconds
		  ActionListener taskPerformer = new ActionListener() {
		      public void actionPerformed(ActionEvent evt) {
	long tempoEmMs = System.currentTimeMillis() ; 
	GregorianCalendar today = new GregorianCalendar(); 
	GregorianCalendar cup = new GregorianCalendar(2014,5,12,0,0);
	long thisTimeInMs = cup.getTimeInMillis();
	long daysLeft = ((thisTimeInMs - tempoEmMs) / 86400000);
	int hoursLeft = (24 - today.get(GregorianCalendar.HOUR_OF_DAY));
	int minutesLeft = (60 - today.get(GregorianCalendar.MINUTE));
	int secondsLeft = (60 - today.get(GregorianCalendar.SECOND));
	String teste = ("Missing:" + daysLeft + " Days " + hoursLeft + " Hours " + minutesLeft + " Minutes " + secondsLeft + " Seconds");
 
 
	          System.out.println(teste);
 
	      }
	  };
	  new Timer(delay, taskPerformer).start();
	  try {
		Thread.sleep(100000);
	} catch (InterruptedException e) {
		e.printStackTrace();
}
	}
 
}

I believe that after the timer describerd in "Thread" ends, the timer will stop. Is that right? How can I make it go forever?

Ah, alright.
I don't have any idea on how to start a GUI, have only been experimenting in Eclipse's IDE, never ran something expecting it to work... Would you send me a tutorial, or even some tips?

Should I create another file for it? Or isn't it possible?

package cupTimer;
 
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.GregorianCalendar;
import javax.swing.* ;
 
public class myTimer {
 
	public static void main(String[] args) {
		int delay = 1000; //milliseconds
		  ActionListener taskPerformer = new ActionListener() {
		      public void actionPerformed(ActionEvent evt) {
	long tempoEmMs = System.currentTimeMillis() ; 
	GregorianCalendar today = new GregorianCalendar(); 
	GregorianCalendar cup = new GregorianCalendar(2014,5,12,0,0);
	long thisTimeInMs = cup.getTimeInMillis();
	long daysLeft = ((thisTimeInMs - tempoEmMs) / 86400000);
	int hoursLeft = (24 - today.get(GregorianCalendar.HOUR_OF_DAY));
	int minutesLeft = (60 - today.get(GregorianCalendar.MINUTE));
	int secondsLeft = (60 - today.get(GregorianCalendar.SECOND));
	String teste = ("Missing:" + daysLeft + " Days " + hoursLeft + " Hours " + minutesLeft + " Minutes " + secondsLeft + " Seconds");
 
 
	          System.out.println(teste);
 
	      }
	  };
	  new Timer(delay, taskPerformer).start();
	  try {
		Thread.sleep(100000);
	} catch (InterruptedException e) {
		e.printStackTrace();
}
 
	JLabel label = new JLabel("Image and Text",
								JLabel.CENTER);
 
	JFrame frame = new JFrame("Teste");
	frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	frame.getContentPane().add(label);
	frame.pack();
	frame.setVisible(true);
	}
 
}

I created the JPane (in the and) and am not sure on what to do with it..

I tried
label.setText(teste);

But it won't work, I also tried label.setText (taskPerformed.getText);
But I 'knew' it wouldn't work... What's the value I need to get?

It won't get the value, it says that "teste" cannot be resolved to a variable