You need to specify your requirements a little more. What camera, what sort of connection to PC, what OS, etc. And I wouldn't choose the language before specifying the problem properly. And, then, I probably wouldn't choose Java.
Lets say the cameras are CCTV cameras (4 cameras) and the OS is Windows XP Pro SP2. The cameras will be connected to a serial port. Can java capture these 4 images directly from the cameras and store them on the PC?