scene类和platform类-javafx

scene类电脑屏幕相关

查看电脑屏幕宽高

Screen primary = Screen.getPrimary();
        double dpi = primary.getDpi();
        System.out.println("当前屏幕dpi:"+dpi);
        Rectangle2D rec1 = primary.getBounds();
        Rectangle2D rec2 = primary.getVisualBounds();
        System.out.println("----全部屏幕--------");
        System.out.println("左上角x:"+rec1.getMinX()+"左上角y"+rec1.getMinY());
        System.out.println("右下角x--"+ rec1.getMaxX()+"右下角y--"+ rec1.getMaxY());
        System.out.println("宽度："+rec1.getWidth()+"高度"+rec1.getHeight());
        System.out.println("----可以看到的屏幕--------");
        System.out.println("左上角x:"+rec2.getMinX()+"左上角y"+rec2.getMinY());
        System.out.println("右下角x--"+ rec2.getMaxX()+"右下角y--"+ rec2.getMaxY());
        System.out.println("宽度："+rec2.getWidth()+"高度"+rec2.getHeight());

给button设置图标

scene.setCursor(Cursor.HAND);//有手，箭头啥的

自定义图标

       scene.setCursor(Cursor.cursor("https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fimg95.699pic.com%2Fxsj%2F18%2Flf%2Fv8.jpg%21%2Ffw%2F700%2Fwatermark%2Furl%2FL3hzai93YXRlcl9kZXRhaWwyLnBuZw%2Falign%2Fsoutheast&refer=http%3A%2F%2Fimg95.699pic.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1656260816&t=ecf4bde3b0f1abc7f9cc10875d8bf940"));

从本地获取图片路径的方式

 URL url = getClass().getClassLoader().getResource("icon/icon.png");
        String oath = url.toExternalForm();

完整代码

    @Override
    public void start(Stage primaryStage) throws Exception{
        Button button = new Button("按钮");
        button.setPrefHeight(100);
        button.setPrefWidth(300);
        URL url = getClass().getClassLoader().getResource("icon/icon.png");
        String path = url.toExternalForm();
        Group group = new Group(button);
        Scene scene = new Scene(group);

         scene.setCursor(Cursor.cursor(path));
        primaryStage.setTitle("javafx");
        primaryStage.setHeight(800);
        primaryStage.setWidth(800);
        primaryStage.setScene(scene);
        primaryStage.show();

    }

打开网页，运行到代码就执行打开的操作

 HostServices hostServices = getHostServices();
        hostServices.showDocument("https://www.cnblogs.com/q1359720840/");

platform类的使用

Platform.runLater-队列线程按照顺序执行

   Platform.runLater(new Runnable() {
                @Override
                public void run() {
                    System.out.println("stop()"+Thread.currentThread().getName());
                }
            });

ImplicitExit(false) 后台运行

  Platform.setImplicitExit(false);// 设置这个之后呢不执行stop方法了
        Platform.exit();//关闭 

检测平台支支不支持什么效果

Platform.isSupported(ConditionalFeature.SCENE3D)//三d效果