Creating a Count Up timer to Break in java
I'm trying to implement a timer based scoring system for a puzzle application i am writing.
Can someone provide me with an example case of creating a JLabel or Panel in swing, containing a visibly counting timer (in seconds from 0), which stops, on a call from a method. And returns its value.
Example:
hrs:mins:seconds [00:00:00] [00:00:01] .. etc.. overwriting the previous entry.
Thanks
EDIT: this is an adaptation of the example code linked by trashgod:
ClockExample
,
which uses simple if statements to display hours 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开发者_运维知识库.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 all!
Thats a bit over-complicated. Instead of using seconds, minutes, hours, you could just use java.util.Date, and java.text.SimpleDateFormat for displaying the time passed.
start = new Date(); // time right now
sdf = new SimpleDateFormat("hh:mm:ss");
Then later 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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