A java GUI program to random pickup one individual as a lucky dog
User Guidance:
1.Load a list of names from an external plain text file, in which one name per row;
2.The image for each individual should be stored under the images directory and the name should be the same as the one in the text file, and the extension should be png;
3.Press the START/space button to start shuffling and press STOP/space button at any time as you want to stop.