To reach the solution below, it was only necessary to merge the solution of this answer with the latter another answer, since the first shows how to make a Timer and display it at runtime on a JLabel, and the second shows how to calculate the time difference using the new API, showing from seconds to days:
import java.time.*;
import javax.swing.*;
import java.awt.event.*;
import java.time.temporal.ChronoUnit;
public class ProgramaExemplo extends JFrame {
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new ProgramaExemplo();;
}
});
}
public JLabel label = new JLabel();
public ProgramaExemplo() {
setExtendedState(MAXIMIZED_BOTH);
setTitle("---");
JPanel x = new JPanel();
x.setLayout(null);
label = new ClockLabel();
x.add(label);
label.setBounds(700, 500, 300, 200);
add(x);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}
class ClockLabel extends JLabel implements ActionListener {
private LocalDateTime start;
public ClockLabel() {
this.start = LocalDateTime.now();
Timer t = new Timer(1000, this);
t.start();
setText(getDateTime(start));
}
private String getDateTime(LocalDateTime segundaDate){
Duration testeDuration = Duration.between(start, segundaDate);
long dias = testeDuration.toDays();
Duration d2 = testeDuration.minus(dias, ChronoUnit.DAYS);
long horas = d2.toHours();
Duration d3 = d2.minus(horas, ChronoUnit.HOURS);
long minutos = d3.toMinutes();
Duration d4 = d3.minus(minutos, ChronoUnit.MINUTES);
long segundos = d4.getSeconds();
Duration d5 = d4.minus(segundos, ChronoUnit.SECONDS);
long nanos = d5.toNanos();
Duration d6 = d5.minus(nanos, ChronoUnit.NANOS);
if (!d6.isZero()) throw new AssertionError(d6.toString());
return "Total: " + dias + " dias, " + horas + " horas, " + minutos + " minutos, " + segundos + " segundos";
}
@Override
public void actionPerformed(ActionEvent ae) {
setText(getDateTime(LocalDateTime.now()));
}
}
}
Working:
Of course you will need to adjust the label size, since you are using AbsoluteLayout, as time passes, the string can increase its size.
How do you get this "running time"? In the example there is no time.
– user28595
By chance the time you’re trying to get is the same of this question?
– user28595
From what I understood "this question" the guy wants the time of the pc, I want to know how long the user is running the program, my doubt is if there is a way to do this, if yes, what I must research to understand how it works. I just want to display on a label or other component that time.
– user59450
What unit of time?
– user28595
@diegofm if you can do it, it would be nice to catch the Hour, minutes and seconds. Or at least Hour and minutes. (if you can do it)
– user59450
The idea is the same as the question I posted, together with this other.
– user28595