Thread: Need some help in a timer

Hello guys!
I need some help to make a timer, a regressive timer.

I need a countdown in days and hours until the next world cup (Brazil WC 2014), and am not sure aabout how it's done.

I copied from somebody else the following code:

package timer;
 
import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JApplet;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Timer;
 
@SuppressWarnings("serial")
public class Test extends JApplet {
 
    private JLabel label1 = new JLabel("60");
    private JLabel label2 = new JLabel("Dias até a copa");
    private int count = 60;
    private Timer timer;
 
    public Test() {
        JPanel panel1 = new JPanel(new GridLayout(1, 2));
        panel1.add(label1);
        panel1.add(label2);
        label1.setHorizontalAlignment(JLabel.CENTER);
        label2.setHorizontalAlignment(JLabel.CENTER);
        JPanel panel2 = new JPanel();
 
        add(panel1, BorderLayout.CENTER);
        add(panel2, BorderLayout.SOUTH);
 
        timer = new Timer(1000, new ActionListener(){
            @Override
            public void actionPerformed(ActionEvent e) {
                count--;
                if (count == 0) timer.stop();
 
                label1.setText(String.valueOf(count));
 
            }
        });
        timer.start();
 
            }
        };

And I need something like this:
HFyYNDs.jpg
That will get the PCs time and will get the time left until a predetermined date

If anybody could put me in the right way to do it, I'd be thankfull!

It's hard to help somebody with code they've copied from somewhere else, because we don't know what you don't know. Do you know Java or programming at all? We don't know.

I suggest you start by reviewing and attempting to apply the Swing Timer Tutorial to the code you have that you can understand. When you get stuck, let us know, and we'll help if we can.

I have some experience in Java and Programming (mainly lua... It's simple, but I can understand it)
And I can understand mostly everything in Java, but I can't do it myself. Most of the times I get lots of codes from lots of people and sort of mix them up until I have some result.

But in this case, I can't go any further than saying what I want, and what I tried to understand..

@Edit
I would say that what I need are the following information:
-A calendar where I can get the information on how many days and hours are missing until the event
-A timer that will start from that equation, so I can, for instance, reset the .jar and it'll still be counting the right time
-Some sort of display that I can get the sentences in, the timer in the middle and some images on the background

I just don't actually know anyway to do what I want...:X

I did this:
Got the PC Time. CHECK
Got today's date (could have set for the date I wanted). CHECK

package timerCopa;
 
import java.util.* ;
 
public class Timer {
 
	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) +1;
	int year =today.get(GregorianCalendar.YEAR);
	System.out.println ("The day of today is: " + day + "/" + month + "/" + year);
 
	}
 
}

And am not sure on how to proceed.

It's not even executable yet (I guess)

I need it to get the difference in days and hours until the date, for example "2 days and 21 hours" and print it big on the screen. That's the hardest part, I guess
But I'm not sure how to make the interface, I would say that making an applet would be ok, but I don't know how to do it x;

package timerCopa;
 
import java.util.* ;
 
public class Timer {
 
	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) +1;
	int year =today.get(GregorianCalendar.YEAR);
	System.out.println ("The day of today is: " + day + "/" + month + "/" + year);
 
	GregorianCalendar cup = new GregorianCalendar();
	cup.set(GregorianCalendar.HOUR_OF_DAY, 0);
	cup.set(GregorianCalendar.DAY_OF_MONTH, 12);
	cup.set(GregorianCalendar.MONTH, 6);
	int dayCup = cup.get(GregorianCalendar.DAY_OF_MONTH);
	int monthCup = cup.get(GregorianCalendar.MONTH);
	int yearCup = cup.get(GregorianCalendar.YEAR);
	long timeCup = (System.currentTimeMillis() - tempoEmMs);
	System.out.println(timeCup);
 
	}
 
}

Something went wrong... We are not 26 miliseconds away from the world cup... x;
I think I checked the date wrongly...

And how to I tell the code that I want the time from that date?
In this case, the timeCup variable.

Trying to create a timer failed as I probrably failed to import the right packages, it's not recognizing ActionListener as something..

package timerCopa;
 
import java.util.GregorianCalendar;
import javax.* ;
 
public class Timer {
 
	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) ;
	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 //	
	ActionListener listener = new ActionListener(){
		  public void actionPerformed(ActionEvent event){
		    System.out.println("test1");
		  }
		};
		Timer displayTimer = new Timer(1000, listener);
		displayTimer.start();
	}
 
}

Oh, btw, i'm not sure if it's alright for me to ask all these things..

firstly, at Timer displayTimer = new Timer (1000, listener); I get the error "The constructor Timer(int, ActionListener) is undefined"
After that, I get an error at displayTimer.start(); "The method Start() is undefined for type Timer.

	ActionListener listener = new ActionListener(){
		  public void actionPerformed(ActionEvent event){
		    System.out.println("test'1");
		  }
		};
		myTimer displayTimer = new Timer(1000, listener);
		displayTimer.start();

Still won't work, at line myTimer displayTimer = new Timer(1000, listener); The constructor Timer(int, ActionListener) is undefined
and at the same line, myTimer cannot be resolved to a type

Oh, now I got it.

package timerCopa;
 
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) ;
	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 //	
	ActionListener listener = new ActionListener(){
		  public void actionPerformed(ActionEvent event){
		    System.out.println("test'1");
		  }
		};
		Timer displayTimer = new Timer(1000, listener);
		displayTimer.start();
	}
 
}

Will keep working.

I'm having problems with the timer; It won't print "Test1" in the console every second...I can't keep experimenting with other times if the basic one won't work x;