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Creating a Count Up timer for a break in java

I am trying to implement a timer-based scoring system for the puzzle application that I am writing.

Can someone provide me an example of a case of creating a JLabel or Panel in a swing containing a visible counting timer (in seconds from 0) that stops when the method is called. And returns its value.

Example:

hh: seconds: [00:00:00] [00:00:01] etc., overwriting the previous record.

thanks

EDIT: This is an adaptation of the example code associated with trashgod: ClockExample , which uses simple if statements to display hours of minutes and seconds ...

 import java.awt.EventQueue; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.text.DecimalFormat; import java.text.NumberFormat; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; import javax.swing.JToggleButton; import javax.swing.Timer; /** @see https://stackoverflow.com/questions/5528939*/ class ClockExample extends JFrame { private static final int N = 60; private static final String stop = "Stop"; private static final String start = "Start"; private final ClockListener cl = new ClockListener(); private final Timer t = new Timer(1000, cl); private final JTextField tf = new JTextField(8); public ClockExample() { t.setInitialDelay(0); JPanel panel = new JPanel(); tf.setHorizontalAlignment(JTextField.RIGHT); tf.setEditable(false); panel.add(tf); final JToggleButton b = new JToggleButton(stop); b.addItemListener(new ItemListener() { @Override public void itemStateChanged(ItemEvent e) { if (b.isSelected()) { t.stop(); b.setText(start); } else { t.start(); b.setText(stop); } } }); panel.add(b); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); this.add(panel); this.setTitle("Timer"); this.pack(); this.setLocationRelativeTo(null); this.setVisible(true); } public void start() { t.start(); } private class ClockListener implements ActionListener { private int hours; private int minutes; private int seconds; private String hour; private String minute; private String second; @Override public void actionPerformed(ActionEvent e) { NumberFormat formatter = new DecimalFormat("00"); if (seconds == N) { seconds = 00; minutes++; } if (minutes == N) { minutes = 00; hours++; } hour = formatter.format(hours); minute = formatter.format(minutes); second = formatter.format(seconds); tf.setText(String.valueOf(hour + ":" + minute + ":" + second)); seconds++; } } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { ClockExample clock = new ClockExample(); clock.start(); } }); } }

Thanks again!

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1 answer

This is a little trickier. Instead of using seconds, minutes, hours, you can simply use java.util.Date and java.text.SimpleDateFormat to display elapsed time.

 start = new Date(); // time right now sdf = new SimpleDateFormat("hh:mm:ss");

Then, to show what time has passed:

 Date now = new Date(); sdf.format(new Date(now.getTime() - start.getTime()); //create a date based on time passed

This will have the same effect and be much clearer and more consise.

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