笔记记录

编写人：老王
时间：2023-04-4
地点：广州

screen获取屏幕信息

package javafx.test;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.geometry.Rectangle2D;
import javafx.stage.Screen;
import javafx.stage.Stage;
public class Main4 extends Application {
    public static void main(String[] args) {
        launch(args);
    }
    @Override
    public void start(Stage stage) throws Exception {
        Screen screen = Screen.getPrimary();
        //获取全部的屏幕的宽度和高度，看不到的也能获取
        Rectangle2D rec1 = screen.getBounds();
        //获取用户可视的屏幕的宽度和高度
        Rectangle2D rec2 = screen.getVisualBounds();
        //下面是全部屏幕宽高和坐标
        System.out.println("左上角x = "+ rec1.getMinX() + "     " +
                "左下角y = " + rec1.getMinY());
        System.out.println("右下角x = "+ rec1.getMaxX() + "     " +
                "右下角y = " + rec1.getMaxY());
        Platform.exit();
    }
}

获取屏幕的宽和高：

System.out.println("宽度 = "+ rec1.getWidth() + "     " +
                "高度 = " + rec1.getHeight());

最终的完整查看可视屏幕和完整屏幕的代码如下：

package javafx.test;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.geometry.Rectangle2D;
import javafx.stage.Screen;
import javafx.stage.Stage;
public class Main4 extends Application {
    public static void main(String[] args) {
        launch(args);
    }
    @Override
    public void start(Stage stage) throws Exception {
        Screen screen = Screen.getPrimary();
        //获取全部的屏幕的宽度和高度，看不到的也能获取
        Rectangle2D rec1 = screen.getBounds();
        //获取用户可视的屏幕的宽度和高度
        Rectangle2D rec2 = screen.getVisualBounds();
        //下面是全部屏幕宽高和坐标
        System.out.println("下面是全部屏幕的宽高和坐标");
        System.out.println("左上角x = "+ rec1.getMinX() + "     " +
                "左下角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("下面是可以看到的屏幕的宽高和坐标");
        System.out.println("左上角x = "+ rec2.getMinX() + "     " +
                "左下角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());
        Platform.exit();
    }
}

可以看到完整的和可视的 宽度和高度是不一样。

查看当前屏幕的分辨率DPI

package javafx.test;
import javafx.application.Application;
import javafx.application.Platform;
import javafx.geometry.Rectangle2D;
import javafx.stage.Screen;
import javafx.stage.Stage;
public class Main4 extends Application {
    public static void main(String[] args) {
        launch(args);
    }
    @Override
    public void start(Stage stage) throws Exception {
        Screen screen = Screen.getPrimary();
       double dpi = screen.getDpi();
        System.out.println("当前屏幕分辨率DPI为：" + dpi);
        Platform.exit();
    }
}