Design a class Named CryptGram.java with the following requirements: Data Members: a Letter(it is provided) array named orderedFrequency to store frequency of the 26 alphabetic letters. Methods: createLetterFrequencyFromFile(File file) getFrequencyByChar(char letter) encode(String textToBeEncoded) decode(String textToBeDecoded) The method: createLetterFrequencyFromFile, reads a file and creates the letter frequency, the letter frequency array MUST by sorted by frequency, for example, the first three Letter elements in the array may look like: d, r, a, which means d appears in the file twice, r five time, and a six times. If the frequencies are ties, then being ordered by alphabetic order. For instance, e and c, c should be placed before e. The method: getFrequencyByChar, returns the number of times the char passed as argument appears in the file The method: encode, encodes the String and returns encoded String. The text to be encoded is encrypted as follows: each character in the text will be encrypted to the character in the letter frequency array: orderedFrequency. For example, letter a or A will be encrypted to the letter of the first element in the orderedFrequency array. The letter z or Z will be encrypted to the letter of the last element in the orderedFrequency array. The method: decode, reverse the encode process and decrypt the text (ignore cases) A demo program is provided for testing. To run the demo, click on the FrequencyEncryptDriver.class, provide file name and text to be encrypted in the argument list. For example *cryptgram.txt java Note: class name, variable name, and method names MUST be the same as specified.
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