javafx從其他類的關閉窗口

Question

我連接到一個小的javaFX窗口中的服務器。連接由新線程完成。但是我想在建立連接時關閉窗口。我如何做到這一點？

這是我試過的。

package se.skplay.scaenicos.subWindows.casparConnection; 

import java.io.IOException; 
import java.net.URL; 
import java.util.ResourceBundle; 

import javafx.fxml.FXML; 
import javafx.fxml.Initializable; 
import javafx.scene.control.Button; 
import javafx.scene.control.Label; 
import javafx.scene.control.TextField; 
import javafx.stage.Stage; 
import se.skplay.scaenicos.Connections; 

public class CasparConnectonController implements Initializable { 

    @FXML private TextField hostFiled = new TextField(); 
    @FXML private TextField portFiled = new TextField(); 
    @FXML private Button cancel; 
    @FXML private Button connect; 
    @FXML private Label connecting = new Label(); 

    private int port = 5250; 
    private String host = "localhost"; 
    static private Stage stage; 

    @FXML 
    protected void connect() throws IOException { 
      if (!hostFiled.getText().equals("")) { 
       host = hostFiled.getText(); 
      } 
      if (!portFiled.getText().equals("")) { 
       port = Integer.parseInt(portFiled.getText()); 
      } 
      connecting.setText("Connecting..."); 

      stage = (Stage) connect.getScene().getWindow(); 
      Connect conCasp = new Connect(host, port); 
      conCasp.start(); 

     try { 
      if (Connections.getCaspar().isConnected()) { 
       closeWindow(); 
      } 
     } catch (NullPointerException e) { 

     } 

    } 

    private void closeWindow() { 
     stage = (Stage) connect.getScene().getWindow(); 
     stage.close(); 
    } 

    @FXML 
    protected void cancel() { 
     closeWindow(); 
    } 

    public static Stage getStage() { 
     return stage; 
    } 


    @Override 
    public void initialize(URL location, ResourceBundle resources) { 

    } 

} 

連接到服務器

package se.skplay.scaenicos.subWindows.casparConnection; 

import java.io.IOException; 

import se.skplay.scaenicos.Connections; 

public class Connect extends Thread { 

    private String host; 
    private int port; 

    public Connect(String host, int port) { 
     this.host = host; 
     this.port = port; 
    } 

    public void run() { 
     try { 
      connect(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

    private void connect() throws IOException { 
     Connections.setCaspar(host, port); 
     CasparConnectonController.getStage().close(); 
    } 

} 

Answer 1

讓您Connect類的Task<Void>一個子類，而不是類：

package se.skplay.scaenicos.subWindows.casparConnection; 

import java.io.IOException; 

import javafx.concurrent.Task ; 

import se.skplay.scaenicos.Connections; 

public class Connect extends Task<Void> { 

    private String host; 
    private int port; 

    public Connect(String host, int port) { 
     this.host = host; 
     this.port = port; 
    } 

    @Override 
    public Void call() { 
     try { 
      connect(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

    private void connect() throws IOException { 
     Connections.setCaspar(host, port); 
     // You can never close a stage from a background thread 
     // CasparConnectonController.getStage().close(); 
    } 

} 

然後你可以使用onSucceeded處理程序，以關閉階段：

@FXML 
protected void connect() throws IOException { 
     if (!hostFiled.getText().equals("")) { 
      host = hostFiled.getText(); 
     } 
     if (!portFiled.getText().equals("")) { 
      port = Integer.parseInt(portFiled.getText()); 
     } 
     connecting.setText("Connecting..."); 

     stage = (Stage) connect.getScene().getWindow(); 
     Connect conCasp = new Connect(host, port); 

     conCasp.setOnSucceeded(event -> closeWindow()); 

     new Thread(conCasp).start(); 

}