Java全屏截图

Question

我正在开发一个游戏项目，并且编写了一些允许游戏全屏运行的基本代码。

我的问题是，当游戏处于全屏模式时，我无法按 Prnt Scrn 截屏！如果我尝试截取屏幕截图，它只会截取全屏游戏窗口后面的内容。有什么想法为什么这不起作用吗？

我在 Windows 7 上运行。这是说明我的问题的 SSCCE：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class FullscreenScreenShotSSCCE extends JFrame
{
    private JPanel screenP;

    private GraphicsDevice grDev;

    /**
    *   Constructor
    *   Preconditions: None.
    *   Postconditions: The window for the SSCCE is created.
    **/

    public FullscreenScreenShotSSCCE()
    {
        super("Fullscreen Prnt Scrn problem SSCCE");
        int screenX = 640;  
        int screenY = 480;
        this.setSize(screenX,screenY);

        // set up resolution change mode

        grDev = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice(); // obtains your graphics device

        // setup the game for full-screen if requested.

        System.out.println("Trying to start program in Fullscreen mode.");

        if(grDev.isFullScreenSupported()) // makes sure fullscreen is supported before doing anything.
        {
            System.out.println("FullScreen is supported");
            this.setUndecorated(true);
            DisplayMode resChangeMode = new DisplayMode(640,480,32,DisplayMode.REFRESH_RATE_UNKNOWN); // create new DisplayMode with different resolution.

            try
            {
                grDev.setFullScreenWindow(this); // set fullscreen mode on. Otherwise this won't work
                grDev.setDisplayMode(resChangeMode); // change DisplayMode to our new resolution.
                System.out.println("Change resolution: Success!");
            }
            catch(Exception e)
            {
                System.out.println("Change resolution: FAIL!");
            }
        }
        this.setExtendedState(MAXIMIZED_BOTH);

        // instantiate main panel

        screenP = new SSCCEPanel();
        this.add(screenP);

        // finishing touches on Game window

        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setVisible(true);

        System.out.println("Game Window successfully created!!!");
    }


    public static void main(String[] args)
    {
        FullscreenScreenShotSSCCE gui = new FullscreenScreenShotSSCCE();        
    }
}




/**
*   SSCCEPanel is the JPanel that manages the example's timer, painting, and logic. 
**/

class SSCCEPanel extends JPanel
{
    private Timer timer;
    public double prevFPS;
    boolean timerReady;

    // The SoundPlayer object is used by the example to play the sounds.

    public SSCCEPanel()
    {
        super(true);
    }

    /**
    *   repaints the SSCCE.
    *   This just shows the current FPS and the number of sounds currently playing.
    **/

    public void paintComponent(Graphics g)
    {
            super.paintComponent(g);

            Graphics2D g2D = (Graphics2D) g;
            g2D.setColor(new Color(0x000000));
            g2D.drawString("Java fullscreen!", 20,20);
            g2D.drawString("Try to take a screenshot!", 20,40);
            g.dispose();
    }
}

Answer 1

问题仍然没有解决。总之，该问题可能是我的机器的图形设备/驱动程序固有的，因为其他用户无法重现我遇到的问题。因此，这个问题在原生Java中已经不值得追求了。

Answer 2

尝试 Alt-PrintScreen（捕获当前窗口）。这可能会在全屏独占模式下发挥作用。祝你好运：-）

Answer 3

不需要任何其他课程。当按下 PRINTSCREEN 时，将游戏渲染到 BufferedImage 上，并使用 ImageIO 保存它。

如何保存图像。
http://docs.oracle.com/javase/tutorial/ 2d/images/saveimage.html

Answer 4

您可以尝试 java.awt.Robot：

    try
    {
        Robot pixelGrabber = new Robot ();
        java.awt.image.BufferedImage bi = pixelGrabber.createScreenCapture (new Rectangle (0, 0, 1024, 768));
    }
    catch (AWTException ex)
    {
        ex.printStackTrace ();
    }

您可以将 1024、768 调整为您的屏幕设置，然后寻找一种动态获取屏幕尺寸的方法。

Answer 5

如果有效，请尝试 ctrl + alt + PrtScrn。