Question

我有一个简单的应用程序可以打开网络摄像头并将实时源放在屏幕上。如果用户单击图像，则框架将在.dng中保存在硬盘驱动器中。但问题是应用程序第一次正常运行。但当我重新启动它时失败

Myron BETA 2.4

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x003744a0, pid=5688, tid=1328
#
# JRE version: 7.0_02-b13
# Java VM: Java HotSpot(TM) Client VM (22.0-b10 mixed mode, sharing windows-x86 )
# Problematic frame:
# C  [myron_ezcam.dll+0x44a0]
#
# Failed to write core dump. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# F:\javacode\libraries\webcam\JMyron0025\JMyron_SimpleCamera_Eclipse\JMyron_SimpleCamera\hs_err_pid5688.log
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.sun.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

我正在使用迈伦，这是我的代码

import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.Timer;
import javax.swing.JComponent;
import javax.swing.JFrame;
import JMyron.*;

public class SimpleCamera extends JFrame
{
    JMyron m;//a camera object
    int width = 320;
    int height = 240;
    VideoPane vp;
    int frameRate = 15; //fps

    public static void main(String[] args)
    {
        SimpleCamera sc = new SimpleCamera("0021");
        sc.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
    }

    public SimpleCamera(final String id)
    {
        setSize(width,height);
        m = new JMyron();//make a new instance of the object
        m.start(width,height);//start a capture at 320x240
        m.findGlobs(1);//disable the intelligence to speed up frame rate
        System.out.println("Myron " + m.version());

        final Timer videoTimer = new Timer(1000/frameRate, new ActionListener()
        {
            public void actionPerformed(ActionEvent evt)
            {
                vp.repaint();
            }

        });

        vp = new VideoPane();
        vp.addMouseListener(new MouseListener() {

            @Override
            public void mouseClicked(MouseEvent arg0) {
                File file = new File("E:\\"+id+".png");

                BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
                int[] img = m.image(); //get the normal image of the camera
                bi.setRGB(0,0,width,height,img,0,width);
                try {
                    ImageIO.write(bi, "png",file);
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

                System.out.println("Click");
                videoTimer.stop();
                setVisible(false);
                setEnabled(false);
                m.stop();


            }

            @Override
            public void mouseEntered(MouseEvent e) {
                // TODO Auto-generated method stub

            }

            @Override
            public void mouseExited(MouseEvent e) {
                // TODO Auto-generated method stub

            }

            @Override
            public void mousePressed(MouseEvent e) {
                // TODO Auto-generated method stub

            }

            @Override
            public void mouseReleased(MouseEvent e) {
                // TODO Auto-generated method stub

            }
        });
        getContentPane().add(vp);       

        videoTimer.start();     
        setVisible(true);
        setEnabled(true);


    }

    class VideoPane extends JComponent
    {
        BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);

        public void paint(Graphics g)
        {
            m.update();//update the camera view
            int[] img = m.image(); //get the normal image of the camera
            bi.setRGB(0,0,width,height,img,0,width);
            g.drawImage(bi, 0, 0, width, height, this);
        }
    }
}

我可以看到javaw进程在进程管理器中继续运行。这可能意味着我有一些进程在运行，因为一旦我从Windows任务管理器终止该进程，我就可以正常运行该程序。请帮助我真正陷入截止日期。

Answer 1

public SimpleCamera(final String id) {
  setSize(width,height);

  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  //add this line where above line present in your code
}

Java webcam应用程序在后台继续运行

1 个答案: