Win a copy of Svelte and Sapper in Action this week in the JavaScript forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Ron McLeod
  • Paul Clapham
  • Bear Bibeault
  • Junilu Lacar
Sheriffs:
  • Jeanne Boyarsky
  • Tim Cooke
  • Henry Wong
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Tim Holloway
  • salvin francis
  • Frits Walraven
Bartenders:
  • Scott Selikoff
  • Piet Souris
  • Carey Brown

Updating GUI properties

 
Greenhorn
Posts: 19
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hi. I'm trying to create a program for work that has a timer. I've tried it as many ways as i could think of, and the timer itself works great, but i wanted the timer to change a label on a GUI form. However, it won't change the text property of a label in the middle of a function. Is there any way around this. Here is how my code is currently laid out:

When the button is clicked:
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String label = new String("jLabel2.text");
jLabel1.setText("Taken");
SeatTimer timer1 = new SeatTimer();
jLabel2.setText("60:00");
while(jLabel2.getText().compareTo("00:00")!=0)
{
jLabel2.setText(timer1.decTime());
}
jLabel1.setText("Open");
}

The logic:
import javax.swing.Timer;
import java.awt.event.*;
import javax.swing.*;
import Logic.*;

public class SeatTimer
{
private final int DELAY = 1;
private int minF = 0;
private int minS = 0;
private int secF = 0;
private int secS = 0;
private String result = new String();


public SeatTimer() {
minF=6;
minS=0;
secF=0;
secS=0;
}

public String decTime()
{
int delay = 100;//milliseconds
result = minF+minS+":"+secF+secS;
result = dec();
StopWatch s = new StopWatch();
s.start();
while(s.getElapsedTimeSecs()<1){}
s.stop();
System.out.println(result);
return result;
}
public String dec()
{
if(secS>0)
{
secS--;
}
else
{
if(secF>0)
{
secF--;
secS=9;
}
else
{
if(minS>0)
{
minS--;
secF=5;
secS=9;
}
else
{
if(minF>0)
{
minF--;
minS=9;
secF=5;
secS=9;
}
else
{
return "Expired";
}
}
}
}
String result = minF+""+minS+":"+secF+""+secS;
return result;
}
}


StopWatch Class:
public class StopWatch
{
private long startTime = 0;
private long stopTime = 0;
private boolean running = false;

public void start() {
this.startTime = System.currentTimeMillis();
this.running = true;
}

public void stop() {
this.stopTime = System.currentTimeMillis();
this.running = false;
}

public long getElapsedTime() {
long elapsed;
if (running) {
elapsed = (System.currentTimeMillis() - startTime);
}
else {
elapsed = (stopTime - startTime);
}
return elapsed;
}

public long getElapsedTimeSecs() {
long elapsed;
if (running) {
elapsed = ((System.currentTimeMillis() - startTime) / 1000);
}
else {
elapsed = ((stopTime - startTime) / 1000);
}
return elapsed;
}
}



There it is. Any help you guys can offer would be great. Thanks in advance.
 
Ranch Hand
Posts: 442
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Have you had a look at SwingUtilities.invokeLater() & invokeAndWait yet?
 
Ranch Hand
Posts: 15304
6
Mac OS X IntelliJ IDE Chrome
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Moving to our Swing related forum...
 
Gregg Bolinger
Ranch Hand
Posts: 15304
6
Mac OS X IntelliJ IDE Chrome
 
Ranch Hand
Posts: 4632
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
use swing's timer

simple demo

 
    Bookmark Topic Watch Topic
  • New Topic