(Compress a file) Write a program that compresses a source file into a target file using the Huffman coding method

(Compress a file) Write a program that compresses a source file into a target file using the Huffman coding method. First use ObjectOutputStream to output the Huffman codes into the target file, and then use BitOutputStream in Programming Exercise 17.17 to output the encoded binary contents to the target file. Pass the files from the command line using the following command:

java Exercise25_18 sourcefile targetfile