将 java 应用程序设置为在 JavaFX 浏览器 window 关闭时关闭？

Question

如何设置 java 应用程序在 JavaFX 浏览器 window 关闭时关闭？

我有一个基于控制台的应用程序，在主要内容的末尾，系统询问用户是否要查看网页。如果是，打开网页。如果没有退出应用程序。

据我了解，javaFX 应用程序会在 window 被 Xed 时关闭。我的问题是，当 window 关闭时，我的应用程序的非 FX 部分 command/text 似乎没有终止。如何在 FX window 关闭时实现应用程序完全终止。

我将包含两个 classes。一个提示用户查看页面并输入 n，然后终止。另一个 class 打开页面。

package mrArray;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.layout.VBox;
import javafx.scene.web.WebEngine;
import javafx.scene.web.WebView;
import javafx.stage.Stage;

/*
 * declare class, subclass of Application.
 * declare, instantiate, initialize vBoxOF,
 */
public class OpenSite extends Application 
{
 VBox vBoxOF = new VBox();

 /*
  * declare method.
  * invoke OpenSite.launch(OpenSite.class);,
  * launch a stand-alone application.
  */
 public static void invokeLaunch() 
 {
  OpenSite.launch(OpenSite.class);
 }
 
 /*
  * declare start(Stage primaryStage),
  * main entry point for all JavaFX applications,
  * declare primaryStageOP,
  * the top level JavaFX container.
  * invoke setId("root"),
  * assign identifier.
  * declare, instantiate, initialize webViewBrowserOL,
  * as node that manages a webEngineOL & displays its content.
  * 
  *  managing one Web page 
  */
 public void start(Stage primaryStage) 
 {
  vBoxOF.setId("root");

  WebView  webViewBrowserOL = new WebView();
  WebEngine webEngineOL = webViewBrowserOL.getEngine();
  String urlSL = "http://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html";
  webEngineOL.load(urlSL);
    
  vBoxOF.setPadding(new Insets(30, 50, 50, 50));
  vBoxOF.setSpacing(10);
  vBoxOF.setAlignment(Pos.CENTER);
  vBoxOF.getChildren().addAll(webViewBrowserOL);

  Scene sceneOL = new Scene(vBoxOF);
  primaryStage.setScene(sceneOL);
  primaryStage.show();
  
  //ViewSiteOrExit.exitApp();
 }
}

package mrArray;


public class ViewSiteOrExit 
{
 /*
  * declare fields,
  */
 private static int statePrSIF;
 private static String enterYOrNPrSSOF;
 
 /*
  * declare method,
  * initialize field,
  * while, test(field) is passing execute,
  * switch, evaluates cases with value(field),
  * matching, execute statements,
  * 0, first case, prompt, y drop to if, reset value, use app again,
  * n drop to else, increment field, 1, second case,
  * invoke method to close app, reset field value to prevent double field invocation,
  * return flow to caller to prevent use of closing Scanner,
  */
  public static void viewSitePromptPuSVM() 
  {
   statePrSIF = 0;
   while (statePrSIF < 2) 
   {
    switch (statePrSIF) 
    {
     case 0: 
      System.out.println();
      System.out.println("[:-)] One more question?");
      System.out.println("Would you like to see what Oracle has to say about me?");
      System.out.println("Enter ' y ' for yes.");
      System.out.println("Enter ' n ' for no.");
      break;
       case 1:
        goodByePuSVM();
        statePrSIF = 0;
        return;
    }
              
    enterYOrNPrSSOF = MrArray.scannerOF.next();
      
    if(enterYOrNPrSSOF.equalsIgnoreCase("y")) 
    {
     statePrSIF = 0;
     System.out.println("[:-)] Well bud, it's been fun.");
     System.out.println("Here is that Orcale thing.");
     System.out.println("See ya later!");
     OpenSite.invokeLaunch();
    }
    else if(enterYOrNPrSSOF.equalsIgnoreCase("n")) 
    {
     statePrSIF++;
    } 
   }
  }
  
  /*
   * declare method,
   * invoke methods, display output,
   * close Scanner, terminate,
   */
  public static void goodByePuSVM()
  {
      System.out.println("[:-)] Well bud, it's been fun.");
      System.out.println("See ya later!");
      
      MrArray.scannerOF.close();
      exitApp();
  }
  
  public static void exitApp()
  {
   System.exit(0); 
  }
}

Answer 1

如果您没有什么可保存的，可以在 stage.setOnCloseRequest() 请求上使用 System.exit(0)。

primaryStage.setOnCloseRequest(new EventHandler<WindowEvent>() {
        @Override
        public void handle(WindowEvent event) {
            System.exit(0);
        }
});

流线型方法

由于您是从 Java 应用程序调用 JavaFX 应用程序，一旦您关闭 JavaFX 应用程序 Window，控件将 return对于 Java 应用程序，我会推荐以下方法。

在 JavaFX 应用程序中 Class

primaryStage.setOnCloseRequest(new EventHandler<WindowEvent>() {
    @Override
    public void handle(WindowEvent event) {
        Platform.exit();
    }
});

在JavaClass

OpenSite.invokeLaunch();
...        // Complete your task
if(!Platform.isFxApplicationThread())
      exitApp(); // or System.exit(0);

Answer 2

您应该使用 Lambda 表达式：

primaryStage.setOnCloseRequest(
    (WindowEvent we) -> {
        Platform.exit();
    });

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