What is the function of FileInputStream in Java?

The FileInputStream class is a class in the Java IO library used to read bytes from a file. It provides a simple way to read data from a file. The main functions of FileInputStream are: 1. Reading byte data from a file: by creating a FileInputStream object, passing the file path to it, and then using the read() method to read the content of the file byte by byte. 2. Reading binary files: FileInputStream can be used to read any type of file, including text files and binary files. For binary files, you can use the read(byte[]) method to read a certain length of byte data. 3. Reading large files: FileInputStream can effectively handle large files by only reading a small chunk of data from the file into memory, rather than loading the entire file into memory. In conclusion, FileInputStream is used to read byte data from a file and is a common tool for reading file content in the Java IO library.