How to detect Web Cam is attached or not Using java

Question

How to detect whether the Web cam is attached to computer or not by using Java?

Answer 1

JMF (Java Media Framework) should be able to detect any media, including a webcam.

Potentially through CaptureDeviceManager.getDeviceList();

---

For "installing JMF on Linux", one way is simply to:

• download it.
• Change directories to the install location.
• Run the command

:

  % /bin/sh ./jmf-2_1_1e-linux-i586.bin

Answer 2

Here is a piece of code I use in a simple Webcam client with JMF:

Format format = new RGBFormat();
MediaLocator cameraLocator = null;
// get device list
Vector deviceList = CaptureDeviceManager.getDeviceList(format);
// if devices available
if(deviceList != null && deviceList.size() > 0) {
  // pick first
  CaptureDeviceInfo device = (CaptureDeviceInfo) deviceList.get(0);
  cameraLocator = device.getLocator();
}

It picks the first available webcam. Of course, after having the webcam you can store the cameraLocator and try to re-open it on the 2nd run.