“Java File I/O Operations in Java”

In Java, File I/O operations are essential for reading from and writing to files. This topic covers how to perform various file operations in Java, such as reading from a file, writing to a file, and handling exceptions.

Reading from a File

To read from a file in Java, you can use the FileInputStream and BufferedReader classes. Here's an example code snippet to read from a file named "input.txt":

try {
    BufferedReader reader = new BufferedReader(new FileReader("input.txt"));
    String line = null;
    
    while ((line = reader.readLine()) != null) {
        System.out.println(line);
    }
    
    reader.close();
} catch (IOException e) {
    e.printStackTrace();
}

Writing to a File

To write to a file in Java, you can use the FileOutputStream and BufferedWriter classes. Here's an example code snippet to write to a file named "output.txt":

try {
    BufferedWriter writer = new BufferedWriter(new FileWriter("output.txt"));
    
    writer.write("Hello, World!");
    
    writer.close();
} catch (IOException e) {
    e.printStackTrace();
}

Handling Exceptions

It's important to handle exceptions when working with files in Java. Always wrap file operations in a try-catch block to handle potential errors gracefully.

By understanding and using proper File I/O operations in Java, you can efficiently read and write data to and from files. This is an essential skill for any Java programmer.