任意读取一幅BMP图像，可以得到图像上任意一点的像素值，读取窗口可以移动，大小可变-Any reading a BMP image, the image can be any point on the pixel value, read the window can be moved, the size variable

Java Shannon Fano Algorithm , encryption and decryption. CitireBit.java read bit by bit from text/bmp file Compara.java compares 2 bits In.txt it s the in file for the interface and algorithm Interfata.java it s the interface file Nod.java