javajavafxprogress-bar
I want to loop through a list and want to show a progressBar while looping through that list
i have two different classes into two different files One class is for ProgressBar
public class ProgressBarController implements Initializable {
@FXML
public ProgressBar progressBar;
@Override
public void initialize(URL location, ResourceBundle resources) {
}
}
and another class is where i want to loop through the list and want to update the progress on the basis of that list
public class AnotherClass {
public Envelope function(List<Invoice> invoiceList) throws IOException {
for(Invoice invoiceModel : invoiceList) {
// update the progressBar and do some work
}
}
}
I tried to create a new thread
Task<Void> task = new Task<>() {
@Override
public Void call() {
for (int i = 0; i < 100; i++) {
// do some work
updateProgress(i + 1, 100);
try {
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
return null;
}
};
progressBar.progressProperty().bind(task.progressProperty());
Thread thread = new Thread(task);
thread.start();
but this was not working either my progress bar is not updating and if it is then it is updating after complete all other task.
I want to update the progressBar on the basis of data in for loop.
Solution
Here is an example that shows how to update the ProgressBar for a list of Tasks. My guess is that What I have in the Button is similar to what you should have in for(Invoice invoiceModel : invoiceList).
Key Code
task.setOnSucceeded((event) -> {
System.out.println("finished working on url " + t.toString());
bar.setProgress(((float)counter.incrementAndGet()) / urlsList.size());
System.out.println("Counter: " + counter + "\t list size: " + urlsList.size());
});
Full Code
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.atomic.AtomicInteger;
import javafx.application.Application;
import javafx.concurrent.Task;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ProgressBar;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
/**
* Creates a FlowPane and adds some rectangles inside. A LayoutAnimator is set
* to observe the contents of the FlowPane for layout changes.
*/
public class App extends Application {
private final ExecutorService exec = Executors.newSingleThreadExecutor(r -> {
Thread t = new Thread(r);
t.setDaemon(true);
return t;
});
AtomicInteger counter = new AtomicInteger(0);
@Override
public void start(Stage primaryStage) {
List<URL> urlsList = getURLs();
ProgressBar bar = new ProgressBar(0);
Button btnProcessUrls = new Button("Process URLs");
btnProcessUrls.setOnAction((onAction) -> {
List<Task> taskList = new ArrayList();
urlsList.forEach((t) -> {
Task task = new Task<Void>() {
@Override
public Void call() {
System.out.println("I starting working on URL " + t.toString());
//Simulate long running task
for (int i = 0; i < 1000000000 ;i++) {
//System.out.print("working on url " + t.toString() + "\r");
}
return null;
}
};
task.setOnSucceeded((event) -> {
System.out.println("finished working on url " + t.toString());
bar.setProgress(((float)counter.incrementAndGet()) / urlsList.size());
System.out.println("Counter: " + counter + "\t list size: " + urlsList.size());
});
taskList.add(task);
});
taskList.forEach(exec::submit);
});
VBox root = new VBox(bar, btnProcessUrls);
Scene scene = new Scene(root, 300, 250);
primaryStage.setTitle("Flow Layout Test");
primaryStage.setScene(scene);
primaryStage.show();
}
public List<URL> getURLs() {
List<URL> urls = new ArrayList();
simulateQueringDbForUrlStrings().forEach((t) -> {
try {
urls.add(new URL(t));
} catch (MalformedURLException ex) {
System.out.println(ex.toString());
}
});
return urls;
}
public List<String> simulateQueringDbForUrlStrings() {
String dbResults = """
http://www.youtube.com
http://www.facebook.com
http://www.baidu.com
http://www.yahoo.com
http://www.amazon.com
http://www.wikipedia.org
http://www.qq.com
http://www.google.co.in
http://www.twitter.com
http://www.live.com
http://www.taobao.com
http://www.bing.com
http://www.instagram.com
http://www.weibo.com
http://www.sina.com.cn
http://www.linkedin.com
http://www.yahoo.co.jp
http://www.msn.com
http://www.vk.com
http://www.google.de
http://www.yandex.ru
http://www.hao123.com
http://www.google.co.uk
http://www.reddit.com
http://www.ebay.com
http://www.google.fr
http://www.t.co
http://www.tmall.com
http://www.google.com.br
http://www.360.cn
http://www.sohu.com
http://www.amazon.co.jp
http://www.pinterest.com
http://www.netflix.com
http://www.google.it
http://www.google.ru
http://www.microsoft.com
http://www.google.es
http://www.wordpress.com
http://www.gmw.cn
http://www.tumblr.com
http://www.paypal.com
http://www.blogspot.com
http://www.imgur.com
http://www.stackoverflow.com
http://www.aliexpress.com
http://www.naver.com
http://www.ok.ru
http://www.apple.com
http://www.github.com
http://www.chinadaily.com.cn
http://www.imdb.com
http://www.google.co.kr
http://www.fc2.com
http://www.jd.com
http://www.blogger.com
http://www.163.com
http://www.google.ca
http://www.whatsapp.com
http://www.amazon.in
http://www.office.com
http://www.tianya.cn
http://www.google.co.id
http://www.youku.com
http://www.rakuten.co.jp
http://www.craigslist.org
http://www.amazon.de
http://www.nicovideo.jp
http://www.google.pl
http://www.soso.com
http://www.bilibili.com
http://www.dropbox.com
http://www.xinhuanet.com
http://www.outbrain.com
http://www.pixnet.net
http://www.alibaba.com
http://www.alipay.com
http://www.microsoftonline.com
http://www.booking.com
http://www.googleusercontent.com
http://www.google.com.au
http://www.popads.net
http://www.cntv.cn
http://www.zhihu.com
http://www.amazon.co.uk
http://www.diply.com
http://www.coccoc.com
http://www.cnn.com
http://www.bbc.co.uk
http://www.twitch.tv
http://www.wikia.com
http://www.google.co.th
http://www.go.com
http://www.google.com.ph
http://www.doubleclick.net
http://www.onet.pl
http://www.googleadservices.com
http://www.accuweather.com
http://www.googleweblight.com
http://www.answers.yahoo.com
http://www.youtube.com
http://www.facebook.com
http://www.baidu.com
http://www.yahoo.com
http://www.amazon.com
http://www.wikipedia.org
http://www.qq.com
http://www.google.co.in
http://www.twitter.com
http://www.live.com
http://www.taobao.com
http://www.bing.com
http://www.instagram.com
http://www.weibo.com
http://www.sina.com.cn
http://www.linkedin.com
http://www.yahoo.co.jp
http://www.msn.com
http://www.vk.com
http://www.google.de
http://www.yandex.ru
http://www.hao123.com
http://www.google.co.uk
http://www.reddit.com
http://www.ebay.com
http://www.google.fr
http://www.t.co
http://www.tmall.com
http://www.google.com.br
http://www.360.cn
http://www.sohu.com
http://www.amazon.co.jp
http://www.pinterest.com
http://www.netflix.com
http://www.google.it
http://www.google.ru
http://www.microsoft.com
http://www.google.es
http://www.wordpress.com
http://www.gmw.cn
http://www.tumblr.com
http://www.paypal.com
http://www.blogspot.com
http://www.imgur.com
http://www.stackoverflow.com
http://www.aliexpress.com
http://www.naver.com
http://www.ok.ru
http://www.apple.com
http://www.github.com
http://www.chinadaily.com.cn
http://www.imdb.com
http://www.google.co.kr
http://www.fc2.com
http://www.jd.com
http://www.blogger.com
http://www.163.com
http://www.google.ca
""";
String[] urls = dbResults.split("\n");
List<String> urlsStringList = new ArrayList();
for (String url : urls) {
urlsStringList.add(url.strip());
}
return urlsStringList;
}
}
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