Description:
Reading data from a file in Java involves utilizing classes from the java.io or java.nio.file packages. Commonly used classes include FileReader and BufferedReader for reading text files, where FileReader opens the file and BufferedReader reads the content line by line, improving efficiency by buffering input. The readLine method retrieves each line until the end of the file is reached. For reading binary data, FileInputStream is used, reading byte-by-byte or into a byte array. In modern approaches, Files from java.nio.file simplifies reading files with methods like readAllLines or readAllBytes, returning the content as a list of strings or a byte array. Ensuring proper resource management involves using try-with-resources to automatically close streams and handle exceptions gracefully.