How can I build a multi instance application?

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  Hello
  How can I keep only one instance of the javafx application at the same time?
  Let not the user run the javafx application is running on your PC.

  Hello. This program does what you want. You can probably find a better solution.

  import javafx.application.Application;
  import javafx.event.ActionEvent;
  import javafx.event.EventHandler;
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  import javafx.scene.control.Button;
  import javafx.scene.layout.StackPane;
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  import java.io.FileReader;
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  import java.io.*;
  import java.nio.channels.FileLock;
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  public class Simpleapp extends Application {
  
      public static void main(String[] args) {
  
          launch(args);
      }
  
      @Override
      public void start(Stage primaryStage) throws Exception {
  
          final File file = new File("flag");
          final RandomAccessFile randomAccessFile = new RandomAccessFile(file, "rw");
          final FileLock fileLock = randomAccessFile.getChannel().tryLock();
  
          System.out.print(fileLock == null);
          if (fileLock == null) {
              Platform.exit();
          }
  
          primaryStage.setTitle("Hello World!");
          Button btn = new Button();
          btn.setText("Say 'Hello World'");
  
          StackPane root = new StackPane();
          root.getChildren().add(btn);
          primaryStage.setScene(new Scene(root, 300, 250));
  
          primaryStage.setOnCloseRequest(new EventHandler() {
  
              @Override
              public void handle(WindowEvent arg0) {
                  try {
                      fileLock.release();
                      randomAccessFile.close();
                      System.out.println("Closing");
                  } catch (Exception ex) {
                      System.out.print(ex.getMessage());
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              }
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          primaryStage.show();
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  < image edited by host to remove personal information >

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  udayjampani wrote:
  Hello
  How can I create a new instance (instance only) on UNIX and how do I mount my database with this new instance.

  (1) define the Instance in your own way!
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  Thanks for posting your question in the Microsoft Community.

  I understand that you want to remove historical uninstalled apps in "Your applications" option of "Windows store". Correct me if I'm wrong.

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  You can consult this article to stop the Photos App to launch itself:

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  If you use an Oracle 11 g server behind the scenes, consider using the SQL UNPIVOT command. Check out the blog of Tim Hall on the UNPIVOT operator control:

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