获取应用程序仍在运行的监视器的屏幕分辨率

Question

我构建了以下 java 类来获取 java swing 应用程序的正确大小。

通过这个类，我可以获得屏幕的分辨率，之后我可以正确设置 java swing 组件的高度和宽度。

如果我在计算机的第一台显示器上运行应用程序，那么这是有效的。如果我尝试在第二个显示器上启动应用程序，类将获得第一个屏幕的分辨率。

这是我计算屏幕分辨率的课程：

包 com.mcsolution.common.Componenti_Swing;

import java.awt.Dimension;
import java.awt.Toolkit;

public class Dimensione extends Dimension {
    Dimension screenSize;
    double larghezza,altezza;
    public Dimensione(){
        Toolkit t = Toolkit.getDefaultToolkit();
        screenSize = t.getScreenSize();
        double width = screenSize.getWidth();
        double height= screenSize.getHeight()*0.9;
        this.setSize(width, height);
    }
    
    

    /********PANEL******************/
    public Dimension DimensionePanel(){
        larghezza = screenSize.getWidth();
        altezza = screenSize.getHeight()*0.95;
        //   System.out.println("Pannello la larghezza � " + width + "la larghezza � " + larghezza);
        this.setSize(larghezza,altezza);
        return this;
    }
    
    public Dimension PanelArticoliScontrini(){
        larghezza = screenSize.getWidth();
        altezza = screenSize.getHeight()*0.65;
        //   System.out.println("Pannello la larghezza � " + width + "la larghezza � " + larghezza);
        this.setSize(larghezza,altezza);
        return this;
    }
    
    public Dimension PanelArticoliDaStampare(){
        larghezza = screenSize.getWidth();
        altezza = screenSize.getHeight()*0.90;
        //   System.out.println("Pannello la larghezza � " + width + "la larghezza � " + larghezza);
        this.setSize(larghezza,altezza);
        return this;
    }
    
}

有办法检测应用程序在哪个显示器上运行并获取屏幕尺寸吗？

Answer 1

使用

jframe.getGraphicsConfiguration().getDevice();

 获取设备。

然后使用

device.getDefaultConfiguration().getBounds();

 获得分辨率。

这是一个工作示例：

import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
import java.awt.BorderLayout;
import java.awt.GraphicsDevice;
import java.awt.Rectangle;

public class Demo {

    private Demo() {
        JFrame jframe = new JFrame("Test");

        // Get the current device
        GraphicsDevice device = jframe.getGraphicsConfiguration().getDevice();

        // get the resolution of the device
        Rectangle r = device.getDefaultConfiguration().getBounds();
        String s = "Device: " + device.getIDstring() +  "\nResolution: " + r.width + "x" + r.height;

        jframe.add(new JTextArea(s), BorderLayout.CENTER);
        jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        jframe.pack();
        jframe.setSize(400,300);
        jframe.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new Demo();
            }
        });
    }

}