Java Program to Convert File to a Byte Array
In order to illustrate the conversion of a text file present in the local directory on a machine to the byte array, we will be considering a random file named say it be ‘gfg.txt’ which is present on the local directory. Let the content inside the file be as shown below:
Note: Keep a check that prior doing anything first create a file on the system repository to deal with our program\writing a program as we will be accessing the same directory through our programs.
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Methods:
- Using read(byte[]) method of FileInputStream class
- Using Files.readAllBytes() method
FileInputStream is useful to read data from a file in the form of a sequence of bytes. FileInputStream is meant for reading streams of raw bytes such as image data. For reading streams of characters, consider using FileReader. read(byte[]) method of FileInputStream class which reads up to the length of the file and then converts bytes of data from this input stream into the byte array.
Procedure:
- Create an instance of File Input Stream with the file path.
- Create a byte array of the same length of the file.
- Read that file content to an array
- Print the byte array
- Close the instance of file input stream as it is a good practice in order to avoid any exception or error been faced during runtime and to release the memory resources making our program optimized leading to faster execution.
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